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

Biology
CELL CYCLE
Chapter No. 7
Second Year
Multiple Choice Questions

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

Inter phase period can be divided into

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

Question 2

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

A	chiasmata
B	tatrad
C	cross over
D	chromatid

Question 3

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	Down's syndrome
C	Mongolism
D	Kline fetter syndrome

Question 4

The linear arrangement of genes is evidenced in:

A	Zygotene
B	Diakinesis
C	Metaphase
D	Leptotene

Question 5

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

A	Telephase
B	Interphase
C	Metaphase
D	prov-ase

Question 6

The cell death due to tissue damage is called

A	Death
B	Autophagy
C	Apoptosis
D	Necrosis

Question 7

Cancer occurs due to error in

A	Meiosis
B	Mitosis
C	Binary
D	Budding

Question 8

Cytoplasm becomes more viscous during:

A	Anaphase
B	Metaphase
C	Telophase
D	Prophase

Question 9

The chromosomes became visible, shorter and thick in

A	Diplotene
B	Leptotene
C	Pachytene
D	Zygotene

Question 10

Cell Death due to tissue damage is called

A	Apoptosis
B	Suicide
C	Necrosis
D	Metastasis

Question 11

Crossing over indicates that chromosomes are:

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

Question 12

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

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

Question 13

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

A	Benign
B	Apoptosis
C	Necrosis
D	Malignant

Question 14

Karyokinesis involves division of Nucleus and Cytokinesis refers to:

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

Question 15

Molosls is a:

A	Equatorial division
B	None
C	Homotypic division
D	Reduction division

Question 16

Karyokinesis involves division of

A	Cells
B	nucleus
C	cytoplasm
D	cell membrane

Question 17

Prolonged prophase is characteristic of:

A	Meiosis
B	Amitosis
C	Mitosis of cleavage
D	Mitosis

Question 18

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

A	4
B	5
C	3
D	6

Question 19

Mongolism is also known as

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

Question 20

Phragmoplast is formed by vesicles originated from

A	Mitochondria
B	Endoplasmic reticulum
C	Golgi complex
D	Chloroplast

Question 21

Synapsis takes place in

A	Anaphase
B	. Zygotene
C	Pachytene
D	Leptotene

Question 22

Crossing over occurs during

A	Diplotene
B	Leptotene
C	Zygotene
D	Pachytene

Question 23

Unequal separation of chromosomes is called

A	Disjunction
B	Separation
C	Metastasis
D	Non-disjunction

Question 24

Pairing of homologous chromosomes for tetrad formation starts at

A	Zygotne
B	Pachytene
C	Diplotene
D	Leptotene

Question 25

Chromatin network is visible during

A	Anaphase
B	prophase
C	metaphase
D	interphase

Question 26

The pairing of homologous chromosomes is completed in:

A	Diplotene
B	Lepotene
C	Zygotene
D	Pachytene

Question 27

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

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

Question 28

Cell grows about twice its size during the phase:

A	Anaphase
B	G1
C	G2
D	S

Question 29

Apoptosis is

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

Question 30

A female lacking ovaries and germ cells is probably affected with

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

Question 31

Prognmmed and organized process of cell death is also called

A	Necrosis
B	Metastasis
C	Apoptosis
D	Cancer

Question 32

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

A	Prophase
B	Telophase
C	Anaphase
D	Metaphase

Question 33

Duplication of Nuclear material in the cell initiates the phase:

A	G2
B	S
C	G1
D	GO

Question 34

The kinetochore fibres of spindle attach to chromosome at region

A	Kinetochore
B	Kinetic
C	Chore
D	Centriole

Question 35

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

A	spindilin & tubulin
B	None
C	tubulin
D	spindilin

Question 36

The Turner syndrome is due to:

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

Question 37

The syndrome having trisomy of chromosome number 18 is

A	Edwards
B	Down
C	Jacob
D	Patau

Question 38

Down's syndrome in human beings is due to:

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

Question 39

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

A	Epigenesis
B	Apoptosis
C	Metastasis
D	Necrosis

Question 40

Chromosomal doubling Occurs in

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

Question 41

G1 (Gap I) is the period of:

A	Metabolic Activity
B	Rest
C	Movement
D	Synthesis

Question 42

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

A	Microfilaments
B	ER
C	Microtubules
D	Golgi apparatus

Question 43

The centrioles lie within the:

A	nucleosome
B	centrosome
C	nucleus
D	chromosome

Question 44

The vesicle forming phragmoplast originate during

A	Telophase
B	Metaphase
C	Interphase
D	Prophase

Question 45

Meiosis generally takes place in plants during formation of

A	Embryo
B	Zygote
C	Gametes
D	Spores

Question 46

Protein sontlal for chromatin formation:

A	Actin
B	Myosin
C	I listone
D	Tubulin

Question 47

The sequence in the cell cycle is:

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

Question 48

Length of cell cycle in yeast cells is:

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

Question 49

Which of the following is not a divisional stage?

A	Telophase
B	Prophase
C	Metaphase
D	interphase

Question 50

In human cell, average cell cycle is about:

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

Question 51

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

A	tubulin
B	Myosin
C	Actin
D	Troponin

Question 52

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	parthenogenesis
B	mitosis
C	budding
D	meiosis

Question 53

Chromosomes can be counted at:

A	Prophase
B	Metaphase
C	Telophase
D	Anaphase

Question 54

The pairing of homologous chromosomes is completed in

A	leptotene
B	diplotene
C	pachytene
D	zygotene

Question 55

Decision for division occurs in a cell at:

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

Question 56

For the formation of fragmoplast, the vesicles originate from:

A	Chloroplast
B	Golgi complex
C	Mitochondria
D	Endoplasmic reticulums

Question 57

Tumors non transferable to other parts are:

A	Malignant
B	Tumors
C	Beingn
D	Cancer

Question 58

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

A	Metalphase
B	Prophase
C	Telophase
D	Anaphase

Question 59

The death of cell due to tissue damage is called

A	apoptosis
B	necrosis
C	Phagocytosis
D	metastsis

Question 60

Microtubules are composed of

A	insulin
B	tubulin
C	haemoglobin
D	Adrenaline

Question 61

Chiasma are most appropriately observed in meiosis during:

A	Diakinesis
B	Diplotene
C	Metaphase II
D	Pachytene

Question 62

One the following is not included in karyokinesis:

A	Metaphase
B	lnterphase
C	Interkinesis
D	Telophase

Question 63

Chromosomes appear inside the nucleus at the time of

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

Question 64

Meiosis & Mitosis are found in:

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

Question 65

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

A	Glycerol
B	Fats
C	RNA
D	DNA

Question 66

The phragmoplast is organized:

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

Question 67

Which of the following is true?

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

Question 68

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

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

Question 69

Cancer is caused mainly by mutations in:

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

Question 70

Nerve cells and eye lens cells remaining stage for life time

A	S
B	G0
C	G1
D	G2

Question 71

The main significance of mitosis is that:

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

Question 72

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

A	Diplotene
B	Leptotene
C	Zygotenei
D	liachytene

Question 73

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

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

Question 74

Synapsis occurs during

A	Leptotene
B	Pachytene
C	diplotene
D	Zygotene

Question 75

Cell cycle is:

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

Question 76

The paired chromosomes repel each other and begin to separate in

A	Pachytene
B	Diplotene
C	Leptotene
D	Zygotene

Question 77

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

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

Question 78

The reduction division is also called:

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

Question 79

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

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

Question 80

Cancer is caused mainly by mutation in

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

Question 81

Bivalents or Tetrads are formed in

A	Diakinesis
B	Pachytene
C	Leptotene
D	Zygotene

Question 82

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

A	Diplotene
B	Pachytene
C	Leptotene
D	Zygotene

Question 83

It is the period of extensive metabolic activity:

A	S
B	G2
C	G1
D	G0

Question 84

The significance of mitosis is that it can:

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

Question 85

The cell death due to tissue damage is called

A	Cramp
B	Apoptosis
C	Fatigue
D	Necrosis

Question 86

During cell division the nuclear division is called

A	Cytokinesis
B	Karyotype
C	Plasmolysis
D	Karyokinesis

Question 87

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

A	None
B	spindle
C	aster
D	aster & spindle

Question 88

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

A	XXX
B	XXY
C	XY
D	XYY

Question 89

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

A	Paqhytene
B	Diplotene
C	Leptotene
D	Zygotene

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

Amitotic divisions are usually found in:

A	Eukaryotes
B	Prokaryote & Eukaryotes
C	Mesokaryotes
D	Prokaryote

Question 92

What are the significant happenings of meiosis

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

Question 93

In non-disjunction chromosomes fail to segregate during

A	Prophase
B	Anaphase
C	Meta phase
D	lnterphase

Question 94

Full cell cycle in yeast cells has length of:

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

Question 95

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

A	9
B	510
C	256
D	158

Question 96

Post mitotic cell can exis the cell cycle during phase

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

Question 97

Pairing of homologous chromosomes is called as

A	synapsis
B	(0) tetrad
C	bivalent
D	synapse

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