Cell Cycle and Cell Division

Question 1

Ability to grow and _________ is the fundamental property of all living organisms.

Answer 1

Reproduce

Question 2

Cell cycle consists of two phased namely :

Answer 2

Interphase
M or mitotic phase

Question 3

Interphase is a phasr between the two successive M phase, where the cell ______ ________ ___ ____ ___________ .

Answer 3

Prepares itself for cell division

Question 4

Where does the actual cell divsion take place?

Answer 4

M or mitotic phase

Question 5

_______ of cell cycle varies from organism to organism and also frok cell to cell.

Answer 5

Period

Question 6

A yeast cell divides once in __ mins

Answer 6

90

Question 7

A human cell divides approximately every __ hours

Answer 7

24

Question 8

What is the most active stage of cell cycle?

Answer 8

Interphase

Question 9

Is cell cycle, which stage is also called the resting phase.

Answer 9

Interphase

Question 10

Interphase is further divided into three parts namely :

Answer 10

G¹ phase
S phase
G² phase

Question 11

G¹ is also called _____ _________ phase or _____ ________ phase

Answer 11

Pre-DNA synthesis
Post mitotic

Question 12

S phase is also called as ____ _________ phase.

Answer 12

DNA synthesis

Question 13

G² phase is also called as ____ ___ _________ phase or ___ ________ phase.

Answer 13

Post DNA synthesis
Pre-mitotic

Question 14

Which phase is the interval between mitosis and initiation of DNA replication?

(1) G¹ phase
(2) S phase
(3) G² phase

Answer 14

G¹ phase

Question 15

During cell cycle, RNA and proteins are synthesised in

(1) G¹ phase
(2) G² phase
(3) S phase

Answer 15

G¹ phase

Question 16

If a cell divides frequently, then it has a ________ G¹ phase and if a cell does not divide frequently, then it ha a ________ G¹ phase.

Answer 16

Shorter
Longer

Question 17

Which cell in animal does not divide?

Answer 17

Nerve cell

Question 18

Cells of which stage remains metabolically active but there is no longer proliferation?

(1) G¹ phase
(2) S phase
(3) G² phase
(4) G⁰ phase

Answer 18

G⁰ phase

Question 19

In which phase does replication of DNA occurs?

Answer 19

S phase

Question 20

In S phase the amount of nucleic acid ie DNA doubles but the ___________ _________ remains the same.

Answer 20

Chromosome number

Question 21

What holds the two sister chromatids together?

Answer 21

Centromere

Question 22

In animal cell, during the S phase, DNA replication begins in the _________, and the centrioles duplicate in the __________. Centrioles are required during the M phase. The centrioles are absent in the plant cell.

Answer 22

Nucleas
Cytoplasm

Question 23

G² phase occurs between

Answer 23

S and M phase

Question 24

In G² phase _______ protein synthesis take place and Mitochondria, ___________ and _____ ________ duplicate in this phase.

Answer 24

Tubulin
Chloroplast
Golgi bodies

Question 25

The DNA synthesis stops at this phase but cell synthesizes ____, ________ etc. required during the next phase.

Answer 25

RNA Proteins

Question 26

In animals, mitotic division is only seen in a _______ somatic cells, whereas in plant cells, mitotic divison occurs in both ________ and _______ cells.

Answer 26

Diploid Haploid Diploid

Question 27

What is the most dramatic period of the cell cycle?

Answer 27

M-phase

Question 28

Distribution of the already duplicated compounds occurs in an orderly manner. It consists of two processes-

Answer 28

Karyokinesis Cytokinesis

Question 29

Cytokinesis is the division of _________ Karyokinesis is the division of ________

Answer 29

Cytoplasm Nucleus

Question 30

Mitosis is called __________ division because the two daughter cells have the same number of chromosomes as that present in the parent cell.

Answer 30

Equational

Question 31

Mitosis was first observed by ____________ in plant cell and by _______ ___________ in animal cell.

Answer 31

Starsburger Walter Flemming

Question 32

The term mitosis was given by _______ __________ in 1882

Answer 32

Walter Flemming

Question 33

Mitosis is also called ________ cell division because it occurs in __________ cells (body cells) of the animals.

Answer 33

Somatic

Question 34

The best phase to observe shape, size and number of chromosomes is

Answer 34

Prophase

Question 35

Cells at the end of prophase, when viewed under the microscope do not show ______ _________, __, ________ ___________ and ________.

Answer 35

Golgi bodies ER Nuclear membrane Nucleolus

Question 36

In prophase the condensation of _________ material takes place.

Answer 36

Chromatin

Question 37

In metaphase the disintegration of the ______ ________ marks the beginning of the metaphase.

Answer 37

Nuclear envelope

Question 38

Chromosome during which stage are called the thickest and shortest?

Answer 38

Metaphase

Question 39

Best stage to study their morphology

Answer 39

Metaphase