Cell Biology - Mixed Extras

Question 1

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

Answer 1

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 .

Question 2

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

Answer 2

1

Question 3

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

Answer 3

2

Question 4

Separation of homologous chromosomes during anaphase 1 is called -

Answer 4

Disjunction

Question 5

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

Answer 5

Anaphase

Question 6

Which is called as HETEROTYPIC division ?

Answer 6

Meiosis - 1

Question 7

Pairing of homologous chromosomes is called -

Answer 7

Synapsis

Question 8

Number of DNA in chromosome at G 2 stage is -

Answer 8

2

Question 9

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

Answer 9

Pachytene

Question 10

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

Answer 10

16

Question 11

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

Answer 11

T

Question 12

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

Answer 12

Shortening of MICROTUBULES attached to KINETOCHORES

Question 13

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

Answer 13

S

Question 14

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

Answer 14

G2 and M (mitosis )

Question 15

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

Answer 15

G1

Question 16

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

Answer 16

G2/ M

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

Question 17

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

Answer 17

Diplotene

Question 18

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

Answer 18

Heart cell
Muscle cell
Nerve cell

Question 19

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 ?

Answer 19

20

Question 20

Stage of mitosis in which the chromosomes are most condensed -

Answer 20

Prophase

Question 21

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

Answer 21

25

Question 22

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

Answer 22

T

Question 23

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

Answer 23

F

Question 24

MICROTUBULES of cilia are composed of tubulin . T/F

Answer 24

T

Question 25

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

Answer 25

F

Question 26

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

Answer 26

Glyoxysomes

Question 27

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

Answer 27

Plasma membrane

Question 28

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

Answer 28

MICROFILAMENTS

Question 29

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

Answer 29

Telomere

Question 30

Water soluble pigments found in plant cell vacuoles are -

Answer 30

Anthocyanins | Carotenoids - fat soluble

Question 31

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

Answer 31

F

Question 32

Protein synthesis and secretion occurs in - RER or ribosomes ?

Answer 32

RER

Question 33

Lamp brush chromosomes are Diplotene bivalents . T/F

Answer 33

T

Question 34

Organelle involved in glycosylation of proteins .

Answer 34

ER

Question 35

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

Answer 35

Cell recognition

Question 36

Ingestion of solid food by plasma membrane is called -

Answer 36

Phagocytosis

Question 37

Which cell organelle synthesises steroids ?

Answer 37

ER

Question 38

Maximum enzymes are present in which cell organelle ?

Answer 38

Mitochondria

Question 39

The smooth ER is generally made of -

Answer 39

Tubules

Question 40

The cell organelle having abundance of oxidising enzymes -

Answer 40

Mitochondria

Question 41

Which cell organelle takes part in the formation of lysosomes ?

Answer 41

ER | Golgi bodies

Question 42

Peroxysomes contain ______ enzyme .

Answer 42

Oxisiding

Question 43

Arrangement of MICROTUBULES in centriole -

Answer 43

9+0

Question 44

Smallest cell organelle : centrosome , ribosome ?

Answer 44

Ribosome - smallest

Question 45

Cell organelle which is called cell engine -

Answer 45

Ribosome

Question 46

Functional unit of chloroplast -

Answer 46

Quantosome

Question 47

Highest arm ratio occur in which chromosome ?

Answer 47

Acrocentric

Question 48

Part of chromosome concerned with aging of organism and cancer -

Answer 48

Telomere

Question 49

________ is made up of Nucleoprotein .

Answer 49

Chromatin

Question 50

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

Answer 50

Cytoplasm | Mitochondria

Question 51

Name a few therapeutic PROTEINS -

Answer 51

Interferons Monoclonal antibodies Insulin Erythropoietin

Question 52

Name 2 basic amino acids-

Answer 52

Lysine | Arginine

Question 53

Name a neutral aa-

Answer 53

Valine

Question 54

Pectin is a protein . T/F

Answer 54

F

Question 55

Maltose is a -

Answer 55

Disaccharide

Question 56

Glycogen is a -

Answer 56

Polysaccharide

Question 57

Give 3 examples of polysaccharides-

Answer 57

Glycogen Starch Cellulose

Question 58

Sucrose is a -

Answer 58

Disaccharide

Question 59

Name a non -essential aa-

Answer 59

Glycine

Question 60

Name 3 essential aa-

Answer 60

Arginine Methionine Phenylalanine Tryptophan

Question 61

Monosaccharide is a pentose sugar /hexose sugar / glucose ?

Answer 61

All

Question 62

essential component of all living organisms -

Answer 62

Proteins

Question 63

Which sugar is found in ATP ?

Answer 63

Ribose ( not deoxyribose)

Question 64

Linkage present in cellulose molecule -

Answer 64

B-1’-4”linkage . Unbranched

Question 65

Cellulose is branched or not ?

Answer 65

Unbranched

Question 66

Amylose and amylopectin chains occur in -

Answer 66

Starch

Question 67

Histones is a basic protein due to -

Answer 67

Lysine | Arginine

Question 68

Which sugar does not give Benedict’s test ?

Answer 68

Sucrose -nonreducing

Question 69

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

Answer 69

1

Question 70

Lactose is mage up of _____ and ____ .

Answer 70

B-glucose and b-galactose

Question 71

Macromolecules chitin is -

Answer 71

N2 containing polysaccharide

Question 72

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

Answer 72

Ester

Question 73

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

Answer 73

Glycoprotein | 200

Question 74

Glycine aa is coded by -

Answer 74

GGG , GGC , GGU

Question 75

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

Answer 75

Soluble

Question 76

How many total carbons are present in Valine ?

Answer 76

16

Question 77

Lipid is biomacromolecule . T/F

Answer 77

F