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Biology 2 > Cell Biology - Mixed Extras > Flashcards

Cell Biology - Mixed Extras Flashcards

1
Q

How many chromosomes shall be present in a diploid cell at mitotic anaphase if its eg cell has 10 chromosomes .

A

40
n=10
There are 4 cells formed rom 1 in meiosis . Therefore , if parent 2n cell has 40 , 4 daughter cells will have 10 each .

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2
Q

At anaphase 2 , of meiosis , each chromosome contains _____ DNA .

A

1

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3
Q

At anaphase 1 , each chromosome is composed of _______ chromatids .

A

2

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4
Q

Separation of homologous chromosomes during anaphase 1 is called -

A

Disjunction

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5
Q

During which stage ,a diploid cell becomes tetraploid in mitosis .

A

Anaphase

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6
Q

Which is called as HETEROTYPIC division ?

A

Meiosis - 1

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7
Q

Pairing of homologous chromosomes is called -

A

Synapsis

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8
Q

Number of DNA in chromosome at G 2 stage is -

A

2

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9
Q

When synapsis is completed al along the chromosome , the cell is said to have entered a stage called -

A

Pachytene

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10
Q

If n=16 , in plant cell then ______ bivalents are found in metaphase 1 .

A

16

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11
Q

Number of bivalents = haploid n number of chromosomes . T/F

A

T

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12
Q

At anaphase 2 , sister chromatids move towards. Opposite poles by -

A

Shortening of MICROTUBULES attached to KINETOCHORES

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13
Q

In which phase of cell cycle , the amount of DNA in a diploid cell becomes 4 times as compared to a haploid cell ?

A

S

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14
Q

During which phases of the cell cycle , the amount of DNA remains at 4C level if the initial amount is 2C ?

A

G2 and M (mitosis )

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15
Q

During cell cycle , in which phase normal components of the cell are synthesised and assembled ?

A

G1

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16
Q

When the cell has stalled DNA replication fork , which checkpoint should be predominantly activated ?

A

G2/ M

Because his checkpoint occurs after S ( in which DNA replication occurs )

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17
Q

The stage during which separation of the paired homologous chromosomes begins -

A

Diplotene

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18
Q

Diploid cells in human , where cell division does not occur -

A

Heart cell
Muscle cell
Nerve cell

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19
Q

In a diploid cell , before S -phase quantity of DNA is 20 pico gram , after meiosis 1 what ill be the quantity of DNA in each daughter cell ?

A

20

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20
Q

Stage of mitosis in which the chromosomes are most condensed -

A

Prophase

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21
Q

Number of chromosome pairs at equator in metaphase 1 of a diploid cell shall be ? ( n=25 )

A

25

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22
Q

The outer membrane of mitochondria is permeable to all kinds of molecules .T/F

A

T

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23
Q

The electrons of the electron transfer chain are embedded in the outer membrane of mitochondria .T/F

A

F

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24
Q

MICROTUBULES of cilia are composed of tubulin . T/F

A

T

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25
Q

The organised beating of cilia is controlled by fluxes of Ca across the membrane .T/F

A

F

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26
Q

In germinating seeds , fatty acids are degraded exclusively in the -

A

Glyoxysomes

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27
Q

In eubacteria , a cellular component that resembles eukaryotic cell is -

A

Plasma membrane

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28
Q

The solid linear cytoskeletal elements having a diameter of 6nm and made up of a single type of monomer are known as -

A

MICROFILAMENTS

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29
Q

_______ shortening during cell division signifies -
Cellular aging
Loss of base pairs from chromosomal ends
Decrease replication potential of cells .

A

Telomere

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30
Q

Water soluble pigments found in plant cell vacuoles are -

A

Anthocyanins

Carotenoids - fat soluble

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31
Q

Polytene chromosomes are found in oocytes of amphibians . T/F

A

F

32
Q

Protein synthesis and secretion occurs in - RER or ribosomes ?

A

RER

33
Q

Lamp brush chromosomes are Diplotene bivalents . T/F

A

T

34
Q

Organelle involved in glycosylation of proteins .

A

ER

35
Q

Carbohydrates which are present int he cell membrane take part in -

A

Cell recognition

36
Q

Ingestion of solid food by plasma membrane is called -

A

Phagocytosis

37
Q

Which cell organelle synthesises steroids ?

A

ER

38
Q

Maximum enzymes are present in which cell organelle ?

A

Mitochondria

39
Q

The smooth ER is generally made of -

A

Tubules

40
Q

The cell organelle having abundance of oxidising enzymes -

A

Mitochondria

41
Q

Which cell organelle takes part in the formation of lysosomes ?

A

ER

Golgi bodies

42
Q

Peroxysomes contain ______ enzyme .

A

Oxisiding

43
Q

Arrangement of MICROTUBULES in centriole -

A

9+0

44
Q

Smallest cell organelle : centrosome , ribosome ?

A

Ribosome - smallest

45
Q

Cell organelle which is called cell engine -

A

Ribosome

46
Q

Functional unit of chloroplast -

A

Quantosome

47
Q

Highest arm ratio occur in which chromosome ?

A

Acrocentric

48
Q

Part of chromosome concerned with aging of organism and cancer -

A

Telomere

49
Q

________ is made up of Nucleoprotein .

A

Chromatin

50
Q

Protein synthesis in animal cell occurs on ribosomes present in______ and ______ .

A

Cytoplasm

Mitochondria

51
Q

Name a few therapeutic PROTEINS -

A

Interferons
Monoclonal antibodies
Insulin
Erythropoietin

52
Q

Name 2 basic amino acids-

A

Lysine

Arginine

53
Q

Name a neutral aa-

A

Valine

54
Q

Pectin is a protein . T/F

A

F

55
Q

Maltose is a -

A

Disaccharide

56
Q

Glycogen is a -

A

Polysaccharide

57
Q

Give 3 examples of polysaccharides-

A

Glycogen
Starch
Cellulose

58
Q

Sucrose is a -

A

Disaccharide

59
Q

Name a non -essential aa-

A

Glycine

60
Q

Name 3 essential aa-

A

Arginine
Methionine
Phenylalanine
Tryptophan

61
Q

Monosaccharide is a pentose sugar /hexose sugar / glucose ?

A

All

62
Q

essential component of all living organisms -

A

Proteins

63
Q

Which sugar is found in ATP ?

A

Ribose ( not deoxyribose)

64
Q

Linkage present in cellulose molecule -

A

B-1’-4”linkage . Unbranched

65
Q

Cellulose is branched or not ?

A

Unbranched

66
Q

Amylose and amylopectin chains occur in -

A

Starch

67
Q

Histones is a basic protein due to -

A

Lysine

Arginine

68
Q

Which sugar does not give Benedict’s test ?

A

Sucrose -nonreducing

69
Q 
Which monosaccharide does not show OPTICAL isomerism ?
1 Dihydroxy acetone
2 glyceraldehyde
3 erythrose 
4 ribose
A

1

70
Q

Lactose is mage up of _____ and ____ .

A

B-glucose and b-galactose

71
Q

Macromolecules chitin is -

A

N2 containing polysaccharide

72
Q

Which bond is least likely to be involved in stabilising the 3 -D folding of most proteins ?

A

Ester

73
Q

_______ contains more than _____ aa and CARBOHYDRATE as its side chain .

A

Glycoprotein

200

74
Q

Glycine aa is coded by -

A

GGG , GGC , GGU

75
Q

Monosaccharides are present in acid ————- pool .

A

Soluble

76
Q

How many total carbons are present in Valine ?

A

16

77
Q

Lipid is biomacromolecule . T/F

A

F

Biology 2 (10 decks)

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