Biology Chapter No. 7 CELL CYCLE 2nd Year Online MCQs

Biology
CELL CYCLE
Chapter No. 7
Second Year
Multiple Choice Questions
Note : All MCQ’s selected in this test are from OLD F.Sc. board , UHS and PMC(Pakistan Medical Commission) Islamabad Papers.

Book Name : Biology
Chapter No. 07
Chapter Name : CELL CYCLE
Total MCQ from Text Book : 97
Book Version : 2020
Published By : Punjab Text Book Board Lahore
Approved By : Govt of the Punjab and Federal Ministry for Education
Test Type : MCQ
Exam conduct By : Inter Boards ofSindh, KPK, Balochistan, AJK, Gilgit Baltistan, Punjab & Federal
Class / Grade : 12th ( F.Sc. Intermediate)
Total Marks : 97
Total Time : 48.5 minutes

GRADE 12 - BIOLOGY CHAPTER NO.7 CELL CYCLE

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GRADE 12 - BIOLOGY CHAPTER NO.7 CELL CYCLE

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Question 1

In the case of human cell, average cell cycle is about

A	30 hours
B	24 hours
C	28 hours
D	26 hours

Question 2

The sequence in the cell cycle is:

A	G2, S, M, G2
B	G 1, S, G2, M
C	S, Cl, G2, M
D	S, M, G1, G2

Question 3

Which of the following is not a divisional stage?

A	Prophase
B	interphase
C	Telophase
D	Metaphase

Question 4

The phragmoplast is organized:

A	At the beginning of telophase
B	At the end of telophase
C	At the beginning of anaphase
D	At the end of anaphase

Question 5

Amitotic divisions are usually found in:

A	Eukaryotes
B	Mesokaryotes
C	Prokaryote & Eukaryotes
D	Prokaryote

Question 6

Protein sontlal for chromatin formation:

A	Tubulin
B	Actin
C	Myosin
D	I listone

Question 7

Pairing of homologous chromosomes is called as

A	synapse
B	bivalent
C	(0) tetrad
D	synapsis

Question 8

In which stage of prophase-I, crossing over occurs:

A	Leptotene
B	Diplotene
C	Zygotene
D	Paqhytene

Question 9

Cancer occurs due to error in

A	Budding
B	Binary
C	Mitosis
D	Meiosis

Question 10

Cancer is caused mainly by mutations in:

A	Sex cells
B	S-phase
C	G2 stage
D	Somatic cells

Question 11

The vesicle forming phragmoplast originate during

A	Metaphase
B	Prophase
C	Telophase
D	Interphase

Question 12

Chromatin network is visible during

A	prophase
B	Anaphase
C	metaphase
D	interphase

Question 13

Chromosomal doubling Occurs in

A	G1 phase
B	G2 phase
C	S-Phase
D	Go phase

Question 14

The main significance of mitosis is that:

A	It causes genetic variation
B	It ensures genetic homogeneity of cells
C	It reduces the number of chromosomes
D	It causes transformation of DNA to RAN

Question 15

Mental retardation is one of the most important characteristic of the human individuals affected with:

A	none of these
B	Klinefelter's syndrome
C	Down's syndrome
D	Turner's syndrome

Question 16

The pairing of homologous chromosomes is completed in:

A	Zygotene
B	Pachytene
C	Diplotene
D	Lepotene

Question 17

Cell cycle is:

A	Series of changes in cell
B	Cell division
C	Replication of DNA
D	Growth period

Question 18

Duplication of Nuclear material in the cell initiates the phase:

A	G1
B	S
C	GO
D	G2

Question 19

Pairing of homologous chromosomes for tetrad formation starts at

A	Zygotne
B	Diplotene
C	Leptotene
D	Pachytene

Question 20

Prolonged prophase is characteristic of:

A	Mitosis of cleavage
B	Amitosis
C	Meiosis
D	Mitosis

Question 21

In non-disjunction chromosomes fail to segregate during

A	lnterphase
B	Meta phase
C	Anaphase
D	Prophase

Question 22

Decision for division occurs in a cell at:

A	G, period
B	Before prophaSe
C	G2 period
D	S period

Question 23

Length of cell cycle in yeast cells is:

A	60 minutes
B	120 minutes
C	90 minutes
D	30 minutes

Question 24

The microtubule is composed of traces of RNA and protein called:

A	Actin
B	tubulin
C	Troponin
D	Myosin

Question 25

The linear arrangement of genes is evidenced in:

A	Zygotene
B	Diakinesis
C	Leptotene
D	Metaphase

Question 26

Synapsis occurs during

A	diplotene
B	Leptotene
C	Pachytene
D	Zygotene

Question 27

In which phase of mitosis the chromatids of chromosomes separates from each other

A	Prophase
B	Telophase
C	Anaphase
D	Metalphase

Question 28

It is the period of extensive metabolic activity:

A	G0
B	G2
C	G1
D	S

Question 29

One the following is not included in karyokinesis:

A	Interkinesis
B	lnterphase
C	Telophase
D	Metaphase

Question 30

Full cell cycle in yeast cells has length of:

A	120 minutes
B	60 minutes
C	30 minutes
D	90 minutes

Question 31

Prognmmed and organized process of cell death is also called

A	Apoptosis
B	Cancer
C	Necrosis
D	Metastasis

Question 32

Which tumor is delocalized or has branches other than site of origin

A	Benign
B	Apoptos's
C	Benign & Malignant
D	Malignant

Question 33

During cell division the nuclear division is called

A	Karyotype
B	Karyokinesis
C	Plasmolysis
D	Cytokinesis

Question 34

The sex chromosomes of the person affected with Klinefelter syndrome is:

A	XY
B	XXY
C	XYY
D	XXX

Question 35

Karyokinesis involves division of

A	cell membrane
B	nucleus
C	Cells
D	cytoplasm

Question 36

Cell grows about twice its size during the phase:

A	Anaphase
B	G1
C	G2
D	S

Question 37

The pairing of homologous chromosomes is completed in

A	leptotene
B	diplotene
C	pachytene
D	zygotene

Question 38

Unequal separation of chromosomes is called

A	Separation
B	Non-disjunction
C	Disjunction
D	Metastasis

Question 39

Synapsis takes place in

A	. Zygotene
B	Pachytene
C	Anaphase
D	Leptotene

Question 40

The period of life cycle of cell between two consecutive divisions is termed as

A	Inter Phase
B	G2 Phase
C	G1 Phase
D	Resting Phase

Question 41

Chromosomes can be counted at:

A	Prophase
B	Telophase
C	Metaphase
D	Anaphase

Question 42

The microtubules which originate from the centrioles during mitosis in animal cell give rise to:

A	aster & spindle
B	aster
C	None
D	spindle

Question 43

Cancer is caused mainly by mutation in

A	Sex cells
B	Malignant cells
C	Reproductive cells
D	Somatic cells

Question 44

The spindle fibers are composed of traces of RNA 8, a protein called:

A	None
B	spindilin & tubulin
C	spindilin
D	tubulin

Question 45

Meiosis generally takes place in plants during formation of

A	Spores
B	Gametes
C	Zygote
D	Embryo

Question 46

The tumor which is localized and not transferred to other body parts

A	Necrosis
B	Apoptosis
C	Malignant
D	Benign

Question 47

The cell death due to tissue damage is called

A	Necrosis
B	Fatigue
C	Apoptosis
D	Cramp

Question 48

In human cell, average cell cycle is about:

A	18 hours .
B	6 hours
C	12 hours
D	24 hours

Question 49

The kinetochore fibres of spindle attach to chromosome at region

A	Kinetic
B	Centriole
C	Kinetochore
D	Chore

Question 50

When chromosomes reach to the poles, the phase starts is:

A	Telophase
B	Anaphase
C	Metaphase
D	Prophase

Question 51

The syndrome having trisomy of chromosome number 18 is

A	Jacob
B	Edwards
C	Down
D	Patau

Question 52

The microtubules of mitotic apparatus are composed of protein tubulin and traces of:

A	RNA
B	DNA
C	Glycerol
D	Fats

Question 53

Nerve cells and eye lens cells remaining stage for life time

A	G0
B	G2
C	G1
D	S

Question 54

The period of cell cycle between two consecutive divisions is termed as:

A	Telephase
B	Interphase
C	Metaphase
D	prov-ase

Question 55

Mongolism is also known as

A	Down's syndrome
B	Klinefelters syndrome
C	Turner's syndrome
D	Jacob's syndrome

Question 56

Which of the following Is the longest phase In cell division?

A	Zygotenei
B	Leptotene
C	Diplotene
D	liachytene

Question 57

The chromosomes became visible, shorter and thick in

A	Diplotene
B	Zygotene
C	Pachytene
D	Leptotene

Question 58

The significance of mitosis is that it can:

A	Occur under adverse conditions
B	Produce idential cells
C	Take place in all parts
D	Be completed very rapidly

Question 59

How many times mitotic divisions will take place to produce 512 cells from a single parent cell

A	9
B	510
C	158
D	256

Question 60

Which of the following is true?

A	Karyokinesis precedes cyt
B	Cytokinesis precedes karyokinesis
C	Cytokinesis and karyokinesis are random
D	Cytokinesis and karyokinesis occur together

Question 61

For the formation of fragmoplast, the vesicles originate from:

A	Golgi complex
B	Chloroplast
C	Mitochondria
D	Endoplasmic reticulums

Question 62

The Turner syndrome is due to:

A	a missing sex chromosome
B	an extra sex chromosome
C	an extra autosome
D	a missing autosome

Question 63

The Syndrome in which individual has short stature, webbed neck, with out ovaries and complete absence of germ cells is

A	Turner's syndrome
B	Kline fetter syndrome
C	Down's syndrome
D	Mongolism

Question 64

Meiosis & Mitosis are found in:

A	Haploid or diploid & haploid cells
B	Diploid and haploid or diploid cells
C	Diploid and haploid cells
D	Diploid cells

Question 65

Tumors non transferable to other parts are:

A	Beingn
B	Malignant
C	Cancer
D	Tumors

Question 66

The difference in the division of a plant cell and animal cell is:

A	Coiling of the chromosomes
B	Spindle formation
C	Movement of chromosomes from the equatorial plane
D	Cell plate formation

Question 67

The spread of tumor cells and establishment of secondary area of growth is known as

A	Necrosis
B	Apoptosis
C	Epigenesis
D	Metastasis

Question 68

Crossing over occurs during

A	Pachytene
B	Zygotene
C	Leptotene
D	Diplotene

Question 69

Crossing over indicates that chromosomes are:

A	Nucleoprotein
B	Disjunction
C	Hertones & Histones
D	Sticky in nature

Question 70

Post mitotic cell can exis the cell cycle during phase

A	G -1
B	G - 0
C	G-2
D	S

Question 71

Special type of cell division in which the number of chromosomes in daughter cells is reduced to half as compared to parent cell is called as:

A	mitosis
B	parthenogenesis
C	budding
D	meiosis

Question 72

Cytoplasm becomes more viscous during:

A	Anaphase
B	Metaphase
C	Prophase
D	Telophase

Question 73

The paired chromosomes repel each other and begin to separate in

A	Pachytene
B	Zygotene
C	Diplotene
D	Leptotene

Question 74

Microtubules are composed of

A	Adrenaline
B	haemoglobin
C	insulin
D	tubulin

Question 75

The cell death due to tissue damage is called

A	Apoptosis
B	Necrosis
C	Autophagy
D	Death

Question 76

The reduction division is also called:

A	Amitosis
B	Meiosis I & Meiosis 11
C	Meiosis I
D	Meiosis 11

Question 77

The death of cell due to tissue damage is called

A	Phagocytosis
B	apoptosis
C	necrosis
D	metastsis

Question 78

Apoptosis is

A	Division of cells
B	Death of cells by tissue damage
C	Suicide of cells
D	Weakness of cells

Question 79

A female lacking ovaries and germ cells is probably affected with

A	Down's syndrome
B	Turner's syndrome
C	Klinefelter's syndrome
D	Haemophilia

Question 80

Inter phase period can be divided into

A	Gl, G2, F1
B	Gl, G2, G3
C	G,, S. G2
D	S1. G. S

Question 81

Down's syndrome in human beings is due to:

A	an extra sex chromosome
B	a missing sex chromosome
C	a missing autosome
D	an extra autosome

Question 82

Chromosomes appear inside the nucleus at the time of

A	Cell differentiation
B	Cell elongation
C	Cell maturation
D	Cell division

Question 83

The centrioles lie within the:

A	nucleus
B	centrosome
C	nucleosome
D	chromosome

Question 84

Which one sub-stage of prophase-I of meioses-I lasts for days, weeks or even years?

A	Leptotene
B	Diplotene
C	Pachytene
D	Zygotene

Question 85

Karyokinesis involves division of Nucleus and Cytokinesis refers to:

A	Division of Whole Cell
B	Division of Cell Wall
C	Division of Centromere
D	Division of Cytoplasm

Question 86

In prophase, the chromosomes condense & become shorter & thicker:

A	Increased coiling of proteins
B	Microtubules pulling chromosomes closer
C	Disintegration of nuclear membrane
D	Increased coiling of chromatids

Question 87

Cell Death due to tissue damage is called

A	Apoptosis
B	Metastasis
C	Necrosis
D	Suicide

Question 88

The plane of new wall formation in a dividing cell is determined by:

A	Microtubules
B	Microfilaments
C	ER
D	Golgi apparatus

Question 89

G1 (Gap I) is the period of:

A	Rest
B	Metabolic Activity
C	Movement
D	Synthesis

Question 90

Post Mitotic Cell can exit the Cell Cycle during

A	S - Phase
B	Go - Phase
C	G2 - Phase
D	G1 - Phase

Question 91

Each chromosome when visible consists of two unseparated replicas known as:

A	tatrad
B	cross over
C	chromatid
D	chiasmata

Question 92

Chiasma are most appropriately observed in meiosis during:

A	Metaphase II
B	Pachytene
C	Diplotene
D	Diakinesis

Question 93

Bivalents or Tetrads are formed in

A	Zygotene
B	Diakinesis
C	Pachytene
D	Leptotene

Question 94

The number of sets of microtubules originate from each pair of centriole is

A	4
B	6
C	3
D	5

Question 95

Phragmoplast is formed by vesicles originated from

A	Chloroplast
B	Endoplasmic reticulum
C	Mitochondria
D	Golgi complex

Question 96

What are the significant happenings of meiosis

A	Random assortment of chromosomes
B	Linkage
C	Crossing over
D	Crossing over and random assortment of chromosomes

Question 97

Molosls is a:

A	None
B	Reduction division
C	Equatorial division
D	Homotypic division

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