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Chapter:

130+ Cell Cycle and Cell divisons Solved MCQs

in Biology

These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: All India Pre Medical Test (AIPMT) .

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Chapter: Cell Cycle and Cell divisons
51.

Which of the following statement is/are correct for prophase of mitosis ?
(i) At the end of this phase nuclear membrane and nucleolus disintegrate.
(ii) At the end of this phase two chromosome and a centromere holding them together.
(iii) This phase begins with the condensation of chromatids along their lengths.

A. (i) only
B. only (i) and (ii)
C. only (ii) and (iii)
D. (i) and (iii)
Answer» A. (i) only
discuss
52.

Which of the following statement is/are correct for Prophase-I ?
(i) During diplotene, the members of each pair of homologous chromosomes start moving away from one another.
(ii) In zygotene, bivalent chromosomes appear tetravalent.
(iii) In diakinesis, chromatids become separated even at the site of chiasmata.

A. only (i)
B. only (ii)
C. only (i) and (iii)
D. (i), (ii) and (iii)
Answer» C. only (i) and (iii)
discuss
53.

Which of the following statement is/are correct for Meiosis-II ?
(i) Chromosomes are arranged on equatorial plate in prophase-II
(ii) Nucleolus disappear during telophase-II
(iii) In anaphase-II, the chromatids with their independent centromeres are called chromosomes.
(iv) In metaphase-II, centromere of each chromosome becomes attached to filament of bipolar spindle.

A. only (i) and (ii)
B. only (iii) and (iv)
C. only (i), (ii) and (iii)
D. (i), (ii) and (iii)
Answer» B. only (iii) and (iv)
discuss
54.

Find out the incorrect pair.

A. Telophase – Chromatin is observed
B. G1 phase – New DNA is synthesized
C. Prophase – nuclear membrane disintegrates
D. Zygotene - Synapsis
Answer» B. G1 phase – New DNA is synthesized
discuss
55.

Find the incorrect pair.

A. Bipolar spindle – Cytoplasmic fibres of protein
B. Prophase – Chromosome made up of two chromatids and centromere
C. Anaphase – Equatorial plate
D. Metaphase - Kinetochore
Answer» C. Anaphase – Equatorial plate
discuss
56.

From the following which pair does not match ?

A. S – state – Synthesis of DNA
B. Meiosis – One parental cell produces two daughter cells
C. Anaphase – Each chomatid with independent centromere.
D. Zygotene - Synapsis
Answer» B. Meiosis – One parental cell produces two daughter cells
discuss
57.

“The number of chiasmata depends on chromosomes” – What is the mistake in the given statement ?

A. Width of chromosome – Word in not mentioned
B. Size of chromosome – Word is not mentioned
C. Number of chromosome – Word is not mentioned
D. Length of chromosome – Word is not mentioned
Answer» D. Length of chromosome – Word is not mentioned
discuss
58.

Which is the true statement for mitosis ?

A. Cell formed by it performs diverse functions i.e. show division of labour
B. The number of chromosomes in the new cells are half than that of the parent cell.
C. Two cells are formed as a result of this division are identical in all aspects.
D. Cells formed as a result of mitosis have different genetic characters.
Answer» C. Two cells are formed as a result of this division are identical in all aspects.
discuss
59.

Which of the following statement is true for mitosis ?

A. Cytokinesis and karyokinesis occur together
B. Cytokinesis and karyokinesis are random
C. Cytokinesis preceedes karyokinesis
D. Karyokinesis preceedes cytokinesis
Answer» D. Karyokinesis preceedes cytokinesis
discuss
60.

Indentify the correct sequence of karyokinesis stages :

A. Prophase, Anaphase, Metaphase, Telophase
B. Prophase, Metaphase, Anaphase, Telophase
C. Prophase, Telophase, Metaphase, Anaphase
D. Prophase, Metaphase, Telophase, Anaphase
Answer» B. Prophase, Metaphase, Anaphase, Telophase
discuss
61.

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

A. zygotene
B. pachytene
C. diplotene
D. diakinesis
Answer» B. pachytene
discuss
62.

Which process is indicated by given diagram ?

A. Cell division during formation of reproductive cells.
B. Cell division in somatic cells.
C. (a) and (b) both
D. Amitosis
Answer» A. Cell division during formation of reproductive cells.
discuss
63.

Which of the following cell can complete one cell cycle in 90 minutes ?

A. Plant cell
B. Animal Cell
C. Angal cel
D. Yeast Cell
Answer» D. Yeast Cell
discuss
64.

Which plant material is best suited for studying mitosis in class room ?

A. Root tip
B. Anther
C. Pieces of bark
D. Shoot apex
Answer» A. Root tip
discuss
65.

Mitosis can occur in

A. Haploid and diploid cells both
B. Pollen mother cells
C. Haploid cell only
D. Diploid cell only
Answer» A. Haploid and diploid cells both
discuss
66.

Genetic homogeneity and exact similarity between chromosomes of various cell within the same type of issue of plant is due to :

A. Cytokinesi
B. Meiosis
C. Mitosis
D. Fertilization
Answer» C. Mitosis
discuss
67.

Spindle fibres are composed of :

A. Lipid
B. Pectins
C. Proteins
D. Cellulose
Answer» C. Proteins
discuss
68.

In the plant cell, cytokinesis occurs by

A. Separation of the cytoplasm from the periphery to central region.
B. Separation of the cytoplasm throughout the equatorial plane simultaneously
C. Separation of the cytoplasm from cell centre to its periphery
D. Following of cytoplasm from two side at right angles to the plane of spindle pole
Answer» C. Separation of the cytoplasm from cell centre to its periphery
discuss
69.

Cytokinesis is generally, but not always, seen in mitosis. If cells undergo mitosis and do not follow cytokinesis then it would result in :

A. Cells with abnormal small nuclei
B. Ensuring genetic homogeneity of cell
C. A cell with a single large nucleus
D. A cell with two or more nuclei
Answer» D. A cell with two or more nuclei
discuss
70.

How many time is the genetic material replicated during meiosis ?

A. Twice
B. Once
C. Four times
D. None of the above
Answer» B. Once
discuss
71.

How does the pairs of homologous chromosomes appear during zygotene phase ?

A. Univalent
B. Trivalent
C. Tetravalent
D. Bivalent
Answer» D. Bivalent
discuss
72.

In which of the following stages chromosomes are not seen clearly ?

A. Leptotene
B. Prophase-II
C. Diplotene
D. Metaphase-III
Answer» B. Prophase-II
discuss
73.

Crossing over involves.......

A. Duplication of chromosome
B. Deletion of chromosomes
C. Exchange of genetic matetial
D. Addition of chromosome
Answer» C. Exchange of genetic matetial
discuss
74.

Crossing over occurs between.......

A. Non – homologous chromatids of non homologous chromosomes
B. Non – sister chromatids of homologous chromosomes
C. Sister chromatids of homologous chromosomes
D. Sister chromatids of non homologous chromosome
Answer» B. Non – sister chromatids of homologous chromosomes
discuss
75.

During meiosis centromere divides :

A. Only one at anaphase - II
B. Only once at anaphase – I
C. Twice in meiosis – I & II
D. Twice in each cell at the end of anaphase – I & II
Answer» A. Only one at anaphase - II
discuss
76.

Which of the following occurs only during meiosis ?

A. Pairing of homologous chromosome
B. Separation of duplicated stands
C. Cytokinesis
D. Disappearance of nucleolus
Answer» A. Pairing of homologous chromosome
discuss
77.

Select the correct option from Column-I and Column-II.
Column-I Column-II
(A) Leptotene (p) Synapsis
(B) Zygotene (q) Formation of bipolar spindle
(C) Pachytene (r) Condensation of chromosomes
(D) Diakinesis (s) Crossing over

A. (A - s) (B - s) (C - p) (D - q)
B. (A - r) (B - r) (C - s) (D - p)
C. (A - r) (B - r) (C - s) (D - q)
D. (A - q) (B - q) (C - s) (D - r)
Answer» C. (A - r) (B - r) (C - s) (D - q)
discuss
78.

Select the correct option from Column-I and Column-II.
Column-I Column-II
(A) G1 phase (p) Synthesis of new DNA
(B) G2 phase (q) Synthesis of DNA does not occur
(C) S phase (r) DNA synthesis stops

A. (A - r) (B - p) (C - q)
B. (A - p) (B - r) (C - q)
C. (A - r) (B - q) (C - p)
D. (A - q) (B - r) (C - p)
Answer» D. (A - q) (B - r) (C - p)
discuss
79.

Due to crossing over, an opportunity for the exchange of genes becomes possible.

A. S - phase
B. Cell Cycle
C. Significance of meiosis
D. G2 phase
Answer» C. Significance of meiosis
discuss
80.

Which of the following statement is true for prophase ?

A. At the end of this phase chromosomes disappear.
B. In this phase condensation of chromosome takes place along their lengths.
C. At the end of this phase nuclear membrane is formed
D. Centriole divides and arranged on opposite pole.
Answer» B. In this phase condensation of chromosome takes place along their lengths.
discuss
81.

Syncytium means........

A. small disc shaped structures at the surface of the centromeres.
B. a condition arises when karyokinesis is not followed by cytokinesis.
C. process of constriction of cytoplasm from peripheral region of cell that extends towards the centre.
D. a multinucleate condition arises when karyokinesis and cytokinesis is over.
Answer» B. a condition arises when karyokinesis is not followed by cytokinesis.
discuss
82.

In animal cell........

A. constriction of cytoplasm begins from the peripheral region of the cell.
B. middle lamella made up of pectin develops.
C. constriction of cytoplasm begins from the centre of the cell.
D. (a) and (b) both
Answer» C. constriction of cytoplasm begins from the centre of the cell.
discuss
83.

Given below is a schematic break-up of the phases/stage of cell cycle :

A. C Karyokinesis
B. D Synthetic phase
C. A Cytokinesis Metaphase
D. B Metaphase
Answer» B. D Synthetic phase
discuss
84.

Spindle fibre shorten.

A. Prophase
B. Telophase
C. Metaphase
D. Anaphase
Answer» D. Anaphase
discuss
85.

Nucleus is reformed

A. Telophase-I
B. Prophase-II
C. Anaphase-II
D. Metaphase-II
Answer» A. Telophase-I
discuss
86.

Pair of homologous chromosomes become arranged at the equatorial plane of the cell.

A. Metaphase-II
B. Metaphae-I
C. Metaphase
D. Zygotene
Answer» B. Metaphae-I
discuss
87.

The period between two successive divisions is called......

A. Cell division
B. Cellcycle
C. Interphase
D. G1 phase
Answer» B. Cellcycle
discuss
88.

The chromosomes are distributed in two cells in half thir number is called.

A. Mitosi
B. Cytokineis
C. Heterotypic division
D. Cellcycle
Answer» C. Heterotypic division
discuss
89.

What is the average cell cycle span of a human cell ?

A. 17 Hrs.
B. 20 Hrs.
C. 24 Hrs.
D. 30 Hrs.
Answer» C. 24 Hrs.
discuss
90.

During cell cycle DNA replication takes place in.......

A. G1 - phase
B. S - phase
C. G2 - phase
D. M - phase
Answer» B. S - phase
discuss
91.

During which of the following phase of mitosis asters appear round the centrioles ?

A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Answer» A. Prophase
discuss
92.

At Which sub stage of meiosis crossing over takes place ?

A. Leptotene
B. Zygotene
C. Pachytene
D. Diplotene
Answer» C. Pachytene
discuss
93.

During which of the following stage of division nuclear membrane and nucleolus reappear ?

A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Answer» D. Telophase
discuss
94.

What is average cell cycle span of a Yeast cell ?

A. 70 min.
B. 85 min.
C. 90 min.
D. 120 min.
Answer» C. 90 min.
discuss
95.

Interphase can be divided into how many sub phases ?

A. 2
B. 3
C. 8
D. 5
Answer» B. 3
discuss
96.

In how many phase the mitosis can be divided ?

A. 4
B. 8
C. 3
D. 5
Answer» A. 4
discuss
97.

The result of meiosis is the formation of.......

A. 4 cell
B. 2 cells
C. 8 cells
D. 6 cells
Answer» C. 8 cells
discuss
98.

The locations at which crossing over occurs are known as......

A. Centromere
B. Kinetochore
C. Chiasmata
D. Centriole
Answer» C. Chiasmata
discuss
99.

Complete disintegration of nuclear membrane and nucleolus take place during which stage of mitosis ?

A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Answer» A. Prophase
discuss
100.

Which of the following structure will not be common to mitotic cell of a higher plant ?

A. Cell plate
B. Centromere
C. Centriole
D. Spindle fibre
Answer» C. Centriole
discuss

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