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
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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