Ch3 Botany Flashcards
What phase is between two successive M-phase?
(1) S-phase
(2) G1-phase
(3) G2-phase
(4) Interphase
(4) Interphase
Interphase
(I) Is a biosynthetic phase in which the
cell duplicates its organelles
(II) Constituted more than 95% duration of cell
cycle
(III) Is the phase between two successive M-phases
(1) Only (I) is correct
(2) Only (II) and (III) are correct
(3) All are correct
(4) None
(3) All are correct
Interphase involves all except–
(1) M-phase
(2) S-phase
(3) G1 phase
(4) G2 phase
(1) M-phase
How much time does cell cycle of yeast takes?
(1) 2 hrs
(2) 60 min.
(3) 30 min.
(4) 90 min
(4) 90 min
The correct sequence of phases of cell cycle is:
(1) G1→ G2→ S → M
(2) M → G1 → G2→ S
(3) G1→ S → G2→ M
(4) S → G1→ G2→ M
(3) G1→ S → G2→ M
A cell cycle includes
(1) Interphase and M phase
(2) prophase, metaphase, anaphase and telophase
(3) G1, S and G2 phases
(4) karyokinesis and cytokinesis
(1) Interphase and M phase
DNA replication occurs in which phase of cell cycle-
(1) M-phase
(2) S-phase
(3) G1 phase
(4) G2 phase
(2) S-phase
Histone proteins are synthesised in
(1) S-phase
(2) G1-phase
(3) G2-phase
(4) M-phase
(1) S-phase
The amount of DNA gets doubled in
(1) M-phase
(2) S-phase
(3) G1 phase
(4) G2 phase
(2) S-phase
Select the incorrect statement regarding S phase of
interphase
(1) It occurs between G1 and G2
(2) DNA replicates in the nucleus in this phase
(3) Centrioles duplicate in the cytoplasm
(4) As DNA is doubled, number of chromosomes
also get doubled
(4) As DNA is doubled, number of chromosomes
also get doubled
Which one is false about G1-phase (Gap-1)?
(1) It occurs between M and S phase
(2) In it cells are metabolically active and
continuously grow
(3) It is pre-synthetic or post mitotic phase
(4) In this phase DNA replicates
(4) In this phase DNA replicates
In a cell with 8 chromosome, number of Centromere is –
(1) 16
(2) 8
(3) 4
(4) 32
(2) 8
Starting of Prophase is marked by
(1) Complete disintegration of nuclear membrane
(2) Disappearance of ER, GB, nucleolus and
nuclear envelope
(3) Initiation of condensation of chromosomal
material
(4) Chromosomes aligns at the equatorial plate
(3) Initiation of condensation of chromosomal
material
Mark the incorrectly matched –
(1) Untangling of DNA - Prophase
(2) Chromosome with two sister chromatid first
appear - Prophase
(3) Aster present – Animal cell
(4) Centriole present – plant cell
(4) Centriole present – plant cell
End of prophase is marked by
(1) Complete disintegration of nuclear membrane
(2) Disappearance of ER, GB, nucleolus and
nuclear envelope
(3) Initiation of condensation of chromosomal
material
(4) Chromosomes align at the equatorial Plate
(2) Disappearance of ER, GB, nucleolus and
nuclear envelope
The centrosome, which had undergone duplication
during S phase of interphase, now begins to move
towards opposite poles of the cell. This feature is of–
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(3) Prophase
Complete disappearance of nuclear membrane marks the beginning of
(1) Metaphase
(2) Anaphase
(3) Telophase
(4) Prophase
(1) Metaphase
In which phase are chromosomes are clearly visible-
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(2) Metaphase
Initiation and complete condensation of chromosome occur respectively in
(1) Prophase and anaphase
(2) Prophase and metaphase
(3) Interphase and prophase
(4) Interphase and metaphase
(2) Prophase and metaphase
In metaphase …….. is first event–
(1) Disintegration of nuclear envelope
(2) Chromosomal condensation start
(3) Chromosomes come at metaphasic plate
(4) Spindle fibre attach on chromosome
(1) Disintegration of nuclear envelope
In ………… phase of mitosis chromosome is in
cytoplasm with two chromatids attach on centromere
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(2) Metaphase
In which phase Spindle fibre attach to Chromosome
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(2) Metaphase
In mitosis, which is the longest phase-
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(3) Prophase
If a cell has 2n number of chromosomes in G1 phase, what is the number of chromosomes in cell after S phase?
(1) n
(2) 2n
(3) 4n
(4) 6n
(2) 2n
In which phase of cell cycle, tubulin protein synthesis occurs for spindle-
(1) G1
(2) G2
(3) S
(4) M
(2) G2
Consider the following statement –
S-I-Amount of DNA in haploid cell is c
S-II-Amount of DNA in Diploid cell in G1 is 2c
S-II-Amount of DNA in Diploid cell in G2 is 4c
Mark the correct option –
(1) Only I correct
(2) Both I and II correct
(3) I, II and III is correct
(4) All wrong
(3) I, II and III is correct
In which phase, ER and golgi body disappear?
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(3) Prophase
Which of the following change does not occur in
metaphase?
(1) Condensation of chromosomes gets completed
(2) Clearly visible chromosome in microscope
(3) Sister chromatids separate
(4) Kinetochores attach to spindle fibres
(3) Sister chromatids separate
The stage at which morphology of chromosomes is
most easily studied is –
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(2) Metaphase
In which phase two sister chromatid separate-
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(1) Anaphase
Centromeres split and chromatids separate in ………
phase of mitosis –
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(1) Anaphase
Mark the incorrectly matched -
(1) Anaphase – Separation of sister chromatids
(2) Metaphase – Centromeres split
(3) Telophase – Nuclear membrane reappear
(4) Metaphase – Chromosome condensation
complete
(2) Metaphase – Centromeres split
In Anaphase, each chromosome moves away from
the equatorial plate, the centromere of each
chromosome remains directed towards the pole and hence at the leading edge, with the arms of the
chromosome –
(1) Move together with centromere
(2) Arms trailing behind
(3) Arms ahead of centromere
(4) Arms remain at equator
(2) Arms trailing behind
Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements. This feature is visible in –
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(4) Telophase
In which phase do chromosomes lose their identity
and convert into chromatin-
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(4) Telophase
Nuclear membrane and nucleolus which disappear at prophase, reappear back during which phase?
(1) Anaphase
(2) Telophase
(3) Metaphase
(4) During cytokinesis
(2) Telophase
In …….. phase of mitosis ER and golgi appear again–
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase
(4) Telophase
Chromosomes move to spindle equator in….……..
phase of mitosis -
(1) Telophase
(2) Prophase
(3) Metaphase
(4) Anaphase
(3) Metaphase
At which stage of mitosis, the two daughter
chromatids separate from each other, migrate towards the opposite poles and are now referred to as chromosomes of the future daughter nuclei?
(1) Prophase
(2) Metaphase
(3) Anaphase
(4) Telophase
(3) Anaphase
Mark the correctly matched –
(1) S-phase – histone synthesis
(2) Kinetochore – on telomere
(3) Sister chromatid separate - Telophase
(4) Nucleolus appear – Prophase
(1) S-phase – histone synthesis
Consider the following statements w.r.t cytokinesis
S-I: In an animal cell, this is achieved by the
appearance of a furrow in the cell wall
S-II: In plant- cell plate formation occurs
(1) Only S-I is correct
(2) Only S-II is correct
(3) Both S-I and S-II are correct
(4) Both S-I and S-II are wrong
(2) Only S-II is correct
Which of the following is not a significance of Mitosis?
(1) Repair
(2) Growth
(3) Maintenance of nucleocytoplasmic ratio
(4) Maintenance of chromosome number generation after generation
(4) Maintenance of chromosome number generation after generation
Mitosis often results in the
(1) Production of diploid daughter cells
(2) Growth of multicellular organisms
(3) Cell repair
(4) All of the above
(4) All of the above
Following events represent which stage of mitosis?
(i) Spindle fibres attach to kinetochores of
chromosomes
(ii) All the chromosomes coming to lie at the
equator
(1) Prophase
(2) Metaphase
(3) Anaphase
(4) Telophase
(2) Metaphase
Consider the following statement –
S-I: Kinetochore is disc shape proteinaceous
structure
S-II: Chromosome clustered at opposite poles
convert into chromatin in anaphase
Mark the correct option
(1) Only S-I is correct
(2) Only S-II is correct
(3) Both S-I and S-II are correct
(4) Both S-I and S-II are wrong
(1) Only S-I is correct
Mark the incorrect w.r.t meiosis
(1) Reductional division
(2) Maintain constant chromosome number
generation after generation
(3) Reduction of chromosome number by half
(4) None of these
(4) None of these
Mark the incorrectly matched –
(1) Plant cytokinesis – Cell plate method
(2) Animal Cytokinesis – Furrow method
(3) Plant cytokinesis-Centripetal order
(4) Both (1) and (2)
(3) Plant cytokinesis-Centripetal order
If the number of chromosomes in G1 phase are 32,
then the number of chromosomes in G2 phase are ___
(1) 16
(2) 32
(3) 64
(4) 8
(2) 32
Compaction of chromosome occur throughout in
……….. phase of meiosis–
(1) Leptotene
(2) Zygotene
(3) Pachytene
(4) Diplotene
(1) Leptotene
During _____ stage the chromosomes become
gradually visible under the light microscope.
(1) Zygotene (2) Pachytene
(3) Leptotene (4) Diplotene
(3) Leptotene
Which of the following event takes place in
zygotene?
(1) Crossing over
(2) Formation of bivalents
(3) Synapsis
(4) More than one
(4) More than one
Synaptonemal complex is formed during which
phase of meiosis I?
(1) Leptotene of prophase I
(2) Zygotene of prophase I
(3) Pachytene of prophase I
(4) Diplotene of prophase I
(2) Zygotene of prophase I
In which of the following phase recombination
nodule appears?
(1) Zygotene
(2) Leptotene
(3) Pachytene
(4) Diplotene
(3) Pachytene
The enzyme recombinase is required at which state
of meiosis?
(1) Pachytene
(2) Zygotene
(3) Diplotene
(4) Diakinesis
(1) Pachytene
Crossing over takes place between which chromatids
and in which stage of the cell cycle?
(1) Non-sister chromatids of non-homologous
chromosomes at Zygotene stage of prophase I.
(2) Non-sister chromatids of homologous
chromosomes at Pachytene stage of prophase I.
(3) Non-sister chromatids of homologous
chromosomes at Zygotene stage of prophase I.
(4) Non-sister chromatids of non-homologous
chromosomes at Pachytene stage of prophase I
(2) Non-sister chromatids of homologous
chromosomes at Pachytene stage of prophase I.
Dissolution of synaptonemal complex start in
(1) Diakinesis (2) Zygotene
(3) Pachytene (4) Diplotene
(4) Diplotene
Diplotene stage of prophase-I is characterized by
(1) Dissolution of synaptonemal complex
(2) Separation of synapsed homologous
chromosomes except at the site of crossovers
(3) Formation of X-shaped structures called chiasmata
(4) All of these
(4) All of these
Terminilisation of chiasmata occur in–
(1) Diakinesis (2) Zygotene
(3) Pachytene (4) Diplotene
(1) Diakinesis
Identify the meiotic stage in which
(1) The chromosome becomes gradually visible
with compaction of chromatin
(2) The complex formed by a pair of synapsed
homologous chromosomes
(3) The four chromatin of each bivalent
chromosome distinct and clearly appear as
tetrad
A B C
(1) Leptotene Pachytene Diplotene
(2) Leptotene Zygotene Pachytene
(3) Zygotene Pachytene Diplotene
(4) Zygotene Diplotene Pachytene
(2) Leptotene Zygotene Pachytene
A bivalent contains
(1) Two homologous chromosomes
(2) 4 chromatids
(3) 2 centromeres
(4) All of the above
(4) All of the above
Which of the following is true about cell cycle?
(1) Coordinated event
(2) Growth and reproduction occur
(3) Under genetic control
(4) All of the above
(4) All of the above
Which of the following is morphologically and
genetically same?
(1) Sister chromatid of homologous pair
(2) Non-sister chromatid of homologous pair
(3) Chromatid of different chromosome
(4) All of the above
(1) Sister chromatid of homologous pair
Structure which are attach at common centromere-
(1) Sister chromatid of homologous pair
(2) Non-sister chromatid of homologous pair
(3) Chromatid of different chromosome
(4) All of the above
(1) Sister chromatid of homologous pair
Which of the following event occur in S-phase?
(1) DNA damage repair
(2) Tubulin synthesis
(3) Centriole synthesis
(4) DNA amount become half
(3) Centriole synthesis
Amount of DNA decrease to normal level in-
(1) M-phase
(2) S-phase
(3) G1 phase
(4) G2 phase
(1) M-phase
Decision to continue cell division is taken in which
phase-
(1) M-phase (2) S-phase
(3) G1 phase (4) G2 phase
(3) G1 phase
In a Diploid cell (2n= 32) number of chromosome
on metaphasic plate is–
(1) 32
(2) 16
(3) 64
(4) 8
(1) 32
In which phase of cell cycle haploid cell undergoing
mitosis have 2c DNA-
(1) G1 (2) G2
(3) S (4) M
(2) G2
In which phase chromosome with two chromatids
first appear-
(1) Anaphase
(2) Metaphase
(3) Prophase
(4) Telophase,
(3) Prophase
In which phase chromosomes are clearly visible
change occur-
(1) Anaphase (2) Metaphase
(3) Prophase (4) Telophase
(2) Metaphase
In which phase spindle fibre attach to chromosome-
(1) Anaphase (2) Metaphase
(3) Prophase (4) Telophase
(2) Metaphase
This phase of cell cycle is a period of intense
synthesis and growth. It constitutes 95% of the
duration of cell cycle. It is
(1) Interphase (2) Telophase
(3) Prophase (4) Anaphase
(1) Interphase
In which phase of cell cycle chromatin starts to get
condensed?
(1) Prophase (2) Metaphase
(3) Anaphase (4) Telophase
(1) Prophase
Identify the correct statement with regard to G1
phase (Gap1) of interphase.
(1) Amount of DNA get double
(2) Cell show growth
(3) Nuclear division takes place.
(4) Centriole duplication
(2) Cell show growth
Nucleus upon cytoplasm ratio increase in:
(1) G1 phase (2) S phase
(3) G2 phase (4) M phase
(4) M phase
Column I Column II
1 G1 phase i Cell grows and organelle
duplication
2 S phase ii Centriole duplication
3 G2 phase iii Cell prepare for division
4 Metaphase in M-phase iv Kinetochore appear
(1) 1-(iii), 2-(iv), 3-(i), 4-(ii)
(2) 1-(iv), 2(i), 3-ii), 4-(iii)
(3) 1-(i), 2(ii), 3-iii), 4-(iv)
(4) 1-(i), 2-(ii), 3(iv), 4-(iii)
(3) 1-(i), 2(ii), 3-iii), 4-(iv)
In the last phase of mitosis
(1) Chromosomes starts to condense
(2) Spindle fibres attach to kinetochore
(3) Nuclear membrane reassembles
(4) Centromeres split to form two chromatids
(3) Nuclear membrane reassembles
The correct sequence of phases of M-phase
(1) Metaphase→ G1 → G2 → Prophase
(2) Prophase→ Metaphase→ Telophase → Anaphase
(3) Prophase→ Metaphase → Telophase → Cytokinesis
(4) Prophase→ Metaphase → Anaphase → Telophase
(4) Prophase→ Metaphase → Anaphase → Telophase
In M phase, the division of nucleus is called as
(1) Cytokinesis (2) Karyokinesis
(3) Nucleokinesis (4) Diakinesis
(2) Karyokinesis
In meiosis, compaction of chromatin is initiated at:
(1) Pachytene
(2) Leptotene
(3) Zygotene
(4) Diplotene
(2) Leptotene
A diploid plant cell with 20 chromosome that has
just completed the S phase of its cell cycle than it has:
(1) 20 chromosome and DNA amount 2c
(2) 40 chromosome and 4c
(3) 10 chromosome and 2c DNA
(4) 20 chromosome and 4c DNA
(4) 20 chromosome and 4c DNA
In plant cells, cytokinesis occurs by
(1) Cell plate (2) Invagination
(3) Furrowing (4) All of the above
(1) Cell plate
The enzyme recombinase is required at which stage
of meiosis?
(1) Metaphase -I (2) Meiosis -II
(3) Prophase-I (4) Metaphase -II
(3) Prophase-I
Which of the following phases of cell cycle is also
known as the resting phase?
(1) G1 phase (2) M-phase
(3) S phase (4) Interphase
(4) Interphase
Mark the incorrect statement–
(1) In leptotene chromosomes become gradually visible under the light microscope
(2) Bivalent clearly visible in Zygotene
(3) Prophase I is typically longer and more complex when compared to prophase of mitosis
(4) Number of tetrads is equal to bivalents
(2) Bivalent clearly visible in Zygotene
In meiosis, synapsis occurs during
(1) Pachytene (2) Zygotene
(3) Leptotene (4) Diplotene
(2) Zygotene
During Meiosis I, in which stage synaptonemal
complex appear?
(1) Zygotene (2) Diplotene
(3) Leptotene (4) Pachytene
(1) Zygotene
Which of the following occur in zygotene.
(1) Synapsis occurs
(2) Bivalent form
(3) Pairing of homologous chromosomes occur
(4) All of the above
(4) All of the above
Crossing over occur between–
(1) Sister chromatids
(2) Non-sister chromatids of non-homologous pair
(3) Non-sister chromatids of homologous pair
(4) Sister chromatids of homologous pair
(3) Non-sister chromatids of homologous pair
The four chromatids of each bivalent chromosomes
become distinct and clearly appears as tetrads in–
(1) Zygotene (2) Pachytene
(3) Diplotene (4) Diakinesis
(2) Pachytene
In__________ phase of meiosis some time oocyte
arrest in mammals–
(1) Leptotene (2) Zygotene
(3) Diakinesis (4) Diplotene
(4) Diplotene
Nucleolus disappear and spindle assembly occur in
………… phase of meiosis I
(1) Leptotene (2) Zygotene
(3) Diakinesis (4) Diplotene
(3) Diakinesis
Identify the meiotic stage in which the homologous
chromosomes separate while the sister chromatids
remain associated at their centromeres.
(1) Anaphase-II (2) Metaphase-I
(3) Prophase I (4) Anaphase -I
(4) Anaphase -I
The microtubules from the opposite poles of the
spindle attach to the kinetochore of homologous
chromosomes
(1) Anaphase I (2) Anaphase II
(3) Anaphase (4) Metaphase I
(4) Metaphase I
Arrange the following events of meiosis in correct
sequence:
(A) Activity of recombinase
(B) Bivalent visible
(C) Terminalisation of chiasmata
(D) Disappearance of nucleolus
(1) (B), (A), (C), (D)
(2) (A), (B), (C), (D)
(3) (B), (C), (D), (A)
(4) (B), (A), (D), (C)
(1) (B), (A), (C), (D)
The stage between two meiosis is–
(1) M-phase (2) Interphase
(3) S-phase (4) Interkinesis
(4) Interkinesis
Which of the following not correct for interkinesis?
(1) DNA Duplication occur
(2) Stage between two meiotic division
(3) Short lived
(4) Both (1) and (3)
(1) DNA Duplication occur
The longest phase of meiosis I is–
(1) Metaphase I (2) Prophase I
(3) Anaphase I (4) Telophase I
(2) Prophase I
The stage during which chromosome completely
condense
(1) Pachytene (2) Diplotene
(3) Diakinesis (4) Zygotene
(3) Diakinesis
Which of the following statement is incorrect?
(1) Prophase II is simpler than prophase I.
(2) Prophase I is longer and complex than prophase
of mitosis.
(3) Nuclear membrane reappears in telophase I.
(4) Anaphase II is not characterized by the splitting
of centromere.
(4) Anaphase II is not characterized by the splitting
of centromere
Meiosis I is reductional division and meiosis II is
equational division because of
(1) Separation of chromatids
(2) Crossing over
(3) The disjunction of homologous chromosomes
(4) The pairing of homologous chromosomes
(1) Separation of chromatids
The number of chromosomes is reduced to half during –
(1) Anaphase of mitosis and meiosis
(2) Meiosis II
(3) Meiosis I
(4) Anaphase
(3) Meiosis I
Chaismata appear in phase–
(1) Diakinesis (2) Diplotene
(3) Pachytene (4) Zygotene
(2) Diplotene
Amount of DNA and ploidy of all four cell after meiosis II is
(1) 2c and n (2) c and n
(3) c and 2n (4) 2c and 2n
(2) c and n
Column I Column II
1 Zygotene i Meiosis arrest in mammalian
oocyte
2 Pachytene ii Nuclear membrane disappears
3 Diplotene iii Recombination nodule
4 Diakinesis iv Synaptonemal complex
Select the correct option from the following:
(1) 1-(iv), 2-(iii), 3-(ii), 4-(i)
(2) 1-(i), 2-(ii), 3-(iv), 4-(iii)
(3) 1-(iv), 2-(iii), 3-(i), 4-(ii)
(4) 1-(iii), 2(iv), 3-(i), 4-(ii)
(3) 1-(iv), 2-(iii), 3-(i), 4-(ii)
The type of division that ensures the production of
haploid phase in the life cycle of sexually reproducing organisms is
(1) Mitosis
(2) Meiosis
(3) Cytokinesis
(4) Interphase
(2) Meiosis
Longest phase of meiosis is
(1) Prophase-I
(2) Prophase-II
(3) Anaphase-I
(4) Metaphase-II
(1) Prophase-I
Nucleolus and golgi bodies may be disappear in
which of the phase-
(1) M-phase (2) S- phase
(3) G1 phase (4) G2 phase
(1) M-phase
Assertion: In mitotic metaphase, morphology of
chromosomes can most easily study.
Reason: Condensation of chromosomes is completed
in metaphase
(1) Both Assertion & Reason are true and the reason
is the correct explanation of the assertion.
(2) Both Assertion & Reason are true but the reason
is not the correct explanation of the assertion.
(3) Assertion is true statement but Reason is false.
(4) Both Assertion and Reason are false statements
(1) Both Assertion & Reason are true and the reason
is the correct explanation of the assertion
During ………… phase the chromosomes are fully
condensed and the meiotic spindle is assembled to
prepare the homologous chromosomes for
separation–
(1) Metaphase I
(2) Anaphase I
(3) Diakinesis
(4) Diplotene
(3) Diakinesis
In ………. Phase of meiosis I, chromosome pair is
connected to opposite pole by spindle fibre -
(1) Prophase I
(2) Metaphase I
(3) Metaphase
(4) Both (1) and (2)
(2) Metaphase I
Recombination between homologous chromosomes
is completed by the end of pachytene, leaving the
chromosomes linked at the sites of …………
(1) Synapsis
(2) Crossing over
(3) Centromere
(4) All
(2) Crossing over
The stage of mitosis by which condensation of
chromosomes is completed, also shows all the
following features, except
(1) Chromosomes can be observed clearly under the microscope
(2) Spindle fibres attach to kinetochores of chromosomes
(3) Nucleolus, Golgi complex and ER reform
(4) Chromosomes come to lie at the equator
(3) Nucleolus, Golgi complex and ER reform
In a maize plant number of chromosome are
(2n=20) than number of bivalent and tetrad are in
zygotene are respectively –
(1) 20 and 20 (2) 20 and 10
(3) 10 and 10 (4) 10 an 20
(3) 10 and 10
The last stage of meiotic prophase I is marked by
(1) Splitting of bivalents
(2) Disappearance of recombination nodules
(3) Dissolution of synaptonemal complex
(4) Terminalisation of chiasmata
(4) Terminalisation of chiasmata
Stages in proper sequence of Prophase I are
(1) Zygotene, Leptotene, Pachytene, Diakinesis and Diplotene
(2) Leptotene, Zygotene, Pachytene, Diplotene and
Diakinesis
(3) Leptotene, Pachytene, Zygotene, Diakinesis and Diplotene
(4) Diplotene, Diakinesis, Pachytene, Zygotene and Leptotene
(2) Leptotene, Zygotene, Pachytene, Diplotene and
Diakinesis
Segregation of homologus chromosome occur in-
(1) Anaphase I
(2) Anaphase II
(3) Anaphase
(4) Both (1) and (3)
(1) Anaphase I
Choose the correct option for the following statements
Statement I: In a plant cell, cytoplasmic division is achieved by the appearance of a furrow in the plasma membrane.
Statement II: The cell furrow grows towards the centre of a cell during cytokinesis.
(1) Statement I & II both are correct
(2) Statement I is correct while statement II is incorrect
(3) Statement I is incorrect while statement II is correct
(4) Statement I & II both are incorrect
(3) Statement I is incorrect while statement II is correct
Consider the following and mark the incorrectly
matched –
(1) Time taken for yeast cell to divide – 90min
(2) G2 phase -Gap between DNA replication &
Cell Division
(3) S-phase – Centriole duplication in plants cells
(4) Anaphase -Shortest phase of mitosis
(3) S-phase – Centriole duplication in plants cells
Marks the incorrect Match
(1) Karyokinesis is not followed by cytokinesis – Syncytium
(2) Syncytium – Multinucleated condition
(3) Animal cell – Formation of cell plate
(4) Mitosis – Equational division
(3) Animal cell – Formation of cell plate
Which of the following change occurs in
interkinesis?
(1) DNA duplication
(2) Chromosomes undergo complete dispersion
(3) Very long phase
(4) Centriole duplication
(4) Centriole duplication
The mitotic spindle is composed of -
(1) Chromosomes (2) Chromatids
(3) Microtubules (4) Chromatin
(3) Microtubules
Which of the following is known as quiescent
phase?
(1) G1 (2) S
(3) G2 (4) G0
(4) G0
Splitting of centromere and hence separation of chromatids occur during
(1) Anaphase of mitosis
(2) Anaphase I of meiosis I
(3) Anaphase II of meiosis II
(4) Both (1) and (3)
(4) Both (1) and (3)
A bivalent of meiosis I consists of
(1) Two chromatids and one centromere
(2) Two chromatids and two centromeres
(3) Four chromatids and two centromeres
(4) Four chromatids and four centromeres
(3) Four chromatids and two centromeres
Choose the incorrect pair.
(1) Kinetochores - Serve as the site of attachment of
spindle fibres to the chromosomes
(2) Meiosis I - Reductional division
(3) Synthesis phase – Number of chromosomes doubles
(4) Meiosis II – Resembles a normal Mitosis
(3) Synthesis phase – Number of chromosomes doubles
The amount of DNA in a somatic cell in G2 stage is
10 pg. The amount of DNA in its G1 stage would be
(1) 5 pg
(2) 10 pg
(3) 20 pg
(4) 15 pg
(1) 5 pg
Mark the correct for mitosis
(1) Maintain same number of chromosomes indaughter cell
(2) Produce identical copies
(3) Can occur in both diploid and haploid cell
(4) All of these
(4) All of these
Consider the following statements
(a) One cycle of DNA replication
(b) Two nuclear division
(c) Formation of four haploid cell in the end
(d) Genetically identical daughter cell
How many are correct for meiosis?
(1) (a), (b) and (c)
(2) (b), (c) and (d)
(3) Only (c) and (d)
(4) All of these
(1) (a), (b) and (c)
Two basic stages of cell cycle are
(1) Interphase and M-phase / divisional phase
(2) Karyokinesis and cytokinesis
(3) Prophase, metaphase, anaphase and telophase
(4) G1, S and G2-phases
(1) Interphase and M-phase / divisional phase
Interphase.
(1) Includes karyokinesis and cytokinesis
(2) Sometime called resting phase, is the
preparatory phase for division in which cell
undergoes growth and DNA replication in an order
(3) Is the shortest phase in which biomolecules are
synthesised very fast
(4) Includes 5% duration of the cell cycle
(2) Sometime called resting phase, is the
preparatory phase for division in which cell
undergoes growth and DNA replication in an order
Cells in G0-stage –
(1) Are metabolically more active
(2) Are metabolically inactive
(3) Remain metabolically active but no longer
proliferate in normal condition
(4) None
(3) Remain metabolically active but no longer
proliferate in normal condition
What happens in S-phase?
(1) DNA replication
(2) In animal cell replication of centriole
(3) Both (1) and (2)
(4) Separation of replicated DNA
(3) Both (1) and (2)
In which of the following phase number of
chromosomes remain same but amount of DNA doubles?
(1) G1
(2) Quiescent stage
(3) G0
(4) S
(4) S
Find out the odd one w.r.t interphase
(1) Karyokinesis
(2) Cytokinesis
(3) Prophase
(4) All of the above
(4) All of the above
Which phase occupies the maximum part of cell cycle?
(1) Mitotic phase
(2) Meiotic phase
(3) Interphase
(4) S phase
(3) Interphase
Read the following statements about cell division and
select the correct ones.
(i) M phase represents the phase when actual cell
division occurs and I phase represents the phase
between two successive M phases.
(ii) In the 24 hours average duration of cell cycle of
a human cell, cell division proper lasts for only about an hour.
(iii) M phase constitutes more than 95% of the duration of cell cycle
(1) (i) and (ii)
(2) (ii) and (iii)
(3) (i) and (iii)
(4) (i), (ii) and (iii)
(1) (i) and (ii)
Read the following statement w.r.t. cell cycle:
(a) M-phase is also called the resting phase because
replication does not occur during this phase.
(b) Interphase is the phase during which the cell is
preparing for division.
(c) The interphase is divided into four prominent
phases, i.e., G0, G1, S and G2 phases.
(d) Interphase represents the phase between the two
successive M phases.
The option with incorrect statement is
(1) (a) and (b)
(2) (a) and (c)
(3) (b) and (d)
(4) (c) and (d)
(2) (a) and (c)
Column-I Column-II
(A) G1-phase (i) Cell quiescence
(B) M-phase (ii) Longest phase of the cell cycle
(C) S-phase (iii) Less than 5% of total duration of
cell cycle
(D) G0-phase (iv) DNA content doubles
(1) A (ii), B (iii), C (iv), D (i)
(2) A (ii), B (iii), C (i), D (iv)
(3) A (iii), B (ii), C (iv), D (i)
(4) A (iii), B (i), C (iv), D (ii)
(1) A (ii), B (iii), C (iv), D (i)
Centrioles get doubled in
(1) M-phase
(2) S-phase
(3) G1 phase
(4) G2 phase
(2) S-phase
Disc shape structures at the surface of the centromeres are made up of
(1) Lipid
(2) Protein
(3) Lipoprotein
(4) Carbohydrate
(2) Protein
G2-phase is also called
(1) Post-mitotic gap phase
(2) Synthetic phase
(3) Pre-mitotic gap phase
(4) Only division
(3) Pre-mitotic gap phase
During which phase of cell cycle, the amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C?
(1) G1
(2) G2
(3) S
(4) M
(2) G2
If number of chromatids in G1 phase are 10, then the
number of chromosomes are ________ in G1
(1) 10
(2) 20
(3) 5
(4) 30
(1) 10
Which of the following is the shortest phase of entire cell cycle?
(1) Metaphase (2) Anaphase
(3) Telophase (4) Interphase
(2) Anaphase
The best phase to study chromosomes is
(1) Prophase (2) Metaphase
(3) Anaphase (4) Telophase
(2) Metaphase
Chromosomes decondense into diffuse chromatin
(1) At the end of telophase
(2) At the beginning of prophase
(3) At the end of interphase
(4) At the end of metaphase
(1) At the end of telophase
Complete disappearance of nuclear membrane marks the beginning of
(1) Metaphase
(2) Anaphase
(3) Telophase
(4) Prophase
(1) Metaphase
How many rounds of mitotic generation are required
to produce 64 cell from a single cell?
(1) 63
(2) 32
(3) 6
(4) 64
(3) 6
The products of mitosis are
(1) One nucleus containing twice as much DNA as the parent nucleus
(2) Two genetically identical cells
(3) Four nuclei containing half as much DNA as the parent nucleus
(4) Two genetically identical nuclei
(2) Two genetically identical cells
In which phase of cell cycle, proteins required for DNA packing are synthesized?
(1) G1
(2) G2
(3) S
(4) M
(3) S
In which phase of karyokinesis, the sister chromatids
separate?
(1) Prophase
(2) Metaphase
(3) Anaphase
(4) Telophase
(3) Anaphase
Which of the following statements is correct?
(1) Animals show only mitotic division in haploid and diploid cells
(2) After S phase the number of chromosomes becomes double i.e., 2n to 4n.
(3) During the G2 phase, proteins are synthesised in
preparation for mitosis while cell growth continues.
(4) S or synthesis phase marks the period during which RNA synthesis takes place
(3) During the G2 phase, proteins are synthesised in
preparation for mitosis while cell growth continues
Select the incorrect match regarding mitotic cell division
(i) Prophase – Chromosomes begin uncoil
(ii) Metaphase – Chromatids move apart
(iii) Telophase – The nuclear membrane reappears
(iv) Late anaphase – Each chromosome consists of
two chromatids
(v) Interphase – Chromosomes are not distinct
(1) (i), (ii) and (iv) only
(2) (i) and (iii) only
(3) (ii), (iv) and (v) only
(4) (i) and (v) only
(1) (i), (ii) and (iv) only
(i) In mitotic cell division, chromosome number is halved.
(ii) Centromere is the point where two sister chromatids are held together.
(iii) The period between two successive mitotic divisions is known as telophase.
(iv) In G1 phase of cell cycle, proteins and RNA are synthesized.
Which of the above given statements are correct?
(1) (i) and (iii) only
(2) (ii) and (iii) only
(3) (i) and (iv) only
(4) (ii) and (iv) only
(4) (ii) and (iv) only
Which of the following process is responsible for
producing genetic recombination?
(1) Synapsis
(2) Chiasmata
(3) Crossing over
(4) Exchange of segments between sister chromatids of homologous chromosome
(3) Crossing over
If a gamete has 10 chromosomes, then how many
bivalents will be produced in its corresponding
meiocyte during meiosis?
(1) 10 (2) 20
(3) 30 (4) 40
(1) 10
X shape structures between homologous
chromosomes appear in
(1) Leptotene (2) Zygotene
(3) Diplotene (4) Diakinesis
(3) Diplotene
A bivalent contains
(1) Two homologous chromosomes
(2) 4 chromatids
(3) 2 centromeres
(4) All of the above
(4) All of the above
What is the number of chromosomes in the end
products of meiosis if meiocyte is 4n?
(1) n (2) 2n
(3) 3n (4) 4n
(2) 2n
If amount of DNA in endosperm cell of an angiosperm is 30 picogram, then what would be the amount of DNA in G2 phase of a mitocyte of meristem in picogram?
(1) 15 (2) 30
(3) 40 (4) 60
(3) 40
Prophase I is relatively ……. as compared to prophase
of mitosis
(1) Simple (2) Shorter
(3) Longer (4) Longer and complex
(4) Longer and complex
In which of the following phase chromosomes
separate without any splitting of their centromeres?
(1) Anaphase
(2) Anaphase I
(3) Anaphase II
(4) metaphase
(2) Anaphase I
Meiosis consists of
(1) Two cell divisions with only one round of DNA
replication
(2) Two cell division in which number of
chromosome will remain same in each daughter cell.
(3) Two cell divisions with only two rounds of chromosome replication
(4) A single cell division with chromosome replication
(2) Two cell division in which number of
chromosome will remain same in each daughter cell
Column I Column II
A Synaptonemal complex (i) Pachytene
B Recombination nodule (ii) Zygotene
C Terminalizationof chiasmata (iii) Telophase I
D Formation of dyad cell (iv) Diakinesis
(1) A-(ii); B-(i); C-(iv); D-(iii)
(2) A-(i); B-(ii); C-(iv); D-(iii)
(3) A-(iii); B-(i); C-(iv); D-(ii)
(4) A-(ii); B-(i); C-(iii); D-(iv)
(1) A-(ii); B-(i); C-(iv); D-(iii)
Column I Column II
A Chromosomes move to equator (i) Pachytene
B Centromere splits and (ii) Zygotene
chromatids move apart
C Pairing homologous chromosomes (iii) Anaphase
D Crossing over homologous between (iv) Metaphase
chromosomes
(1) A-(i), B-(ii), C-(iii), D-(iv)
(2) A-(ii), B-(iii), C-(iv), D-(i)
(3) A-(iv), B-(iii), C-(ii), D-(i)
(4) A-(iii), B-(i), C-(iv), D-(ii)
(3) A-(iv), B-(iii), C-(ii), D-(i)
Four different steps that occur during meiosis are given in the following list:
(i) Complete separation of chromatids
(ii) Pairing of homologous chromosomes
(iii) Lining up of paired chromosomes on equator
(iv) Crossing over between chromatids
Select the correct sequential arrangement of the steps.
(1) (ii), (iii), (iv), (i)
(2) (iii), (ii), (iv), (i)
(3) (ii), (iv), (iii), (i)
(4) (iii), (i), (ii), (iv)
(3) (ii), (iv), (iii), (i)
Identify the wrong statement about meiosis.
(1) Pairing of homologous chromosomes.
(2) Four haploid cells are formed.
(3) At the end of meiosis number of chromosomes
reduced to half.
(4) Two cycles of DNA replication occur
(4) Two cycles of DNA replication occur
Anaphase of the mitosis is different from anaphase I, as it shows
(1) Alignment of chromosomes at the equator
(2) Separation of homologous chromosomes towards the opposite poles
(3) Splitting of centromere and separation of sister chromatid towards the opposite poles
(4) Attachment of spindle fiber from opposite poles to the Kinetochores of sister chromatids
(3) Splitting of centromere and separation of sister chromatid towards the opposite poles
Consider the following statement –
S-I Chromosome is fully condensed in Metaphase
S-II Chromosome is visible in Prophase
Mark the correct option
(1) Only S-I is correct
(2) Only S-II is correct
(3) Both S-I and S-II are correct
(4) Both S-I and S-II are wrong
(3) Both S-I and S-II are correct
Which of the following separate in Anaphase II?
(1) Sister chromatids
(2) Homologous chromosomes
(3) Non-sister chromatids
(4) Non-homologous chromosomes
(1) Sister chromatids
In a diploid cell, number of chromosomes is 36 and
after colchicine application number of chromosome is
(1) 72 (2) 36
(3) 18 (4) 42
(1) 72
Maximum number of meiosis require to produce
40 seeds are –
(1) 50 (2) 100
(3) 40 (4) 20
(1) 50
Number of meiosis require to give 100 pollen –
(1) 25
(2) 50
(3) 100
(4) 20
(1) 25
Which of the following cell division contributes towards evolution?
(1) Amitosis (2) Mitosis
(3) Meiosis (4) All of the above
(3) Meiosis
