CBSE Class 11 Biology Cell Cycle and Cell Division MCQs Set F

Question: Crossing over occurs between
a) sister chromatids of homologous chromosomes
b) non-sister chromatids of homologous chromosomes
c) sister chromatids of non-homologous chromosomes
d) non-sister chromatids of non-homologous chromosomes
Answer: b

Question: In mitosis, nucleolus and nuclear membrane disappear at
a) interphase
b) prophase
c) metaphase
d) telophase
Answer: b

Question: Recombination involves
a) crossing over
b) chromosome duplication
c) spindle formation
d) cytokinesis
Answer: a

Question: Which of the following cellular structures always disappears during mitosis and meiosis?
a) Plastid and nuclear membrane
b) Nucleolus and nuclear membrane
c) Endoplasmic reticulum and mitochondria
d) Endoplasmic reticulum and plasma membrane
Answer: b

Question: Which of the following phase follows S and G2 phases of interphase?
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase
Answer: a

Question: Best stage to observe shape, size and number of chromosomes is
a) interphase
b) metaphase
c) prophase
d) telophase
Answer: b

Question: Interphase includes all of the following except
a) G1 phase
b) Anaphase
c) S phase
d) G2 phase
Answer: b

Question: Chromosome synapsis or bivalent formation occurs in
a) leptotene
b) zygotene
c) pachytene
d) diplotene
Answer: b

Question: Significance of mitosis involves
a) the growth of multicellular organism
b) cell repair
c) production of diploid daughter cells with identical genetic complement
d) all of the above
Answer: d

Question: The synaptonemal complex appears
a) between homologous chromosomes
b) in zygotene stage
c) composed of DNA + protein
d) All of the above
Answer: d

Question: Synapsis occurs between
a) spindle fibres and centromeres
b) mRNA and ribosomes
c) a male and female gamete
d) two homologous chromosomes
Answer: d

Question: Chiasmata are first seen in
a) leptotene
b) zygotene
c) pachytene
d) diplotene
Answer: d

Question: Interkinesis is a
a) stage between meiosis I and meiosis II
b) stage between two mitotic divisions
c) interphase
d) both (b) and (c)
Answer: a

Question: During mitosis, nuclear envelope, nucleolus begin to form and ER to reappear at
a) prophase
b) late metaphase
c) anaphase
d) telophase
Answer: d

Question: In anaphase of mitosis,
a) chromosomes get arranged in middle of cell
b) nuclear envelope disappears
c) chromosome fibres become clear
d) chromosomes aggregate at opposite poles to form daughter nuclei
Answer: d

Question: In meiosis, division is
a) Ist reductional and IInd equational
b) Ist equational and IInd reductional
c) both reductional
d) both equational
Answer: a

Question: Crossing over occurs during
a) leptotene
b) pachytene
c) diplotene
d) diakinesis
Answer: b

Question: Which of the following statement is not true for homologous chromosome pairs?
a) They come from only one of the individual’s parents
b) They usually contain slightly different versions of the same genetic information
c) They segregate from each other during meiosis I
d) They synapse during meiosis I
Answer: a

Question: Which of the following phase is called the resting phase during which cell is preparing for division by undergoing both cell growth and replication of DNA?
a) M-phase
b) Prophase
c) Go phase
d) Interphase
Answer: d

Question: What is the stage of mitosis in which chromosomes are arranged on the equator of spindle?
a) Anaphase
b) Prophase
c) Metaphase
d) Telophase
Answer: c

Question: Cell plate grows from
a) Wall to centre
b) Centre to walls
c) One wall to another
d) Simultaneously
Answer: b

Question: Find out the wrongly matched pair of the stage of prophase I with their feature.
a) Zygotene – Synaptonemal complex
b) Pachytene – Mutation
c) Diplotene – Chiasmata
d) Diakinesis – Terminalization
Answer: b

Question: Which of the following statement(s) is/are true?
a) Cell plate represents the middle lamella between the walls of two adjacents cells.
b) At the time of cytokinesis, organelles like mitochondria and plastids get distributed between the daughter cells.
c) Cytokinesis in plant cell is centrifugal and takes place by cell-plate formation while animal cells by furrowing/cleavage and is centripetal.
d) All of the above
Answer: d

Question: Electron micrographs of which stage indicate that chromosomes accompanied by the formation of complex structure called synaptonemal complex?
a) Zygotene
b) Pachytene
c) Diplotene
d) Diakinesis
Answer: a

Question: Significance of meiosis lies in
a) Reduction of chromosome number to one half
b) Maintaining consistancy of chromosome number during sexual reproduction
c) Production of genetic variability
d) All of the above
Answer: d

Question: Which phase of cell cycle is known as quiescent stage?
a) M phase
b) G0 phase
c) G1 phase
d) S phase
Answer: b

Question: Mitosis and meiosis take place respectively in
a) Meristem and gametangia
b) Gametangia and meristem
c) Permanent tissues and secretory tissues
d) Secretory tissues and permanent tissues
Answer: a

Question: In which stage, the chromosomes appear thin and long thread-like?
a) Zygotene
b) Leptotene
c) Pachytene
d) Prophase
Answer: b

Question: The microtubules of the mitotic spindle attach to a specialized structure in the centromere region of each chromosome called the __________.
a) Telomere
b) Centriole
c) Chromatin
d) Kinetochore
Answer: d

Question: How many mitotic divisions are needed for a single cell to make 128 cells?
a) 7
b) 14
c) 28
d) 64
Answer: a

Question: Which one of the following precedes re-formation of the nuclear envelope during M phase of the cell cycle?
a) Decondensation from chromosomes, and reassembly of the nuclear lamina
b) Transcription from chromosomes, and re-assembly of the nuclear lamina
c) Formation of the contractile ring, and formation of the phragmoplast
d) Formation of the contractile ring, and transcription from chromosomes
Answer: b

Question: Choose the mismatch pair.
a) Karyokinesis – Division of centromere
b) Cytokinesis – Division of cytoplasm
c) S-phase – DNA synthesis
d) Synapsis – Pairing of homologous chromosomes
Answer: a

Question: During which stages (or prophase I substages) of meiosis do you expect to find the bivalents and DNA replication respectively?
a) Pachytene and interphase (between two meiotic divisions)
b) Pachytene and interphase (just prior to prophase I)
c) Pachytene and S phase (of interphase just prior to prophase I)
d) Zygotene and S phase (of interphase prior to prophase I)
Answer: d

Question: How many meiotic divisions are required to produce 100 pollen grains?
a) 25
b) 50
c) 100
d) 125
Answer: a

Question: Select the correct statement with respect to mitosis.
a) Chromatids separate but remain in the centre of the cell in anaphase.
b) Chromatids start moving towards opposite poles in telophase.
c) Golgi complex and endoplasmic reticulum are still visible at the end of prophase.
d) Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase.
Answer: d

Question: Terminalization occurs during ______
a) Mitosis
b) Diakinesis
c) Meiosis II
d) Cytokinesis
Answer: b

Question: In cell cycle, DNA replication takes place in ______
a) G1 phase
b) G2 phase
c) Mitotic metaphase
d) S phase
Answer: d

Question: Which of the following pair is correctly matched?
a) Anaphase I – Homologous chromosomes are separated
b) Metaphase I – Pairing of maternal and paternal chromosomes
c) Interphase – A nuclear envelope encloses each haploid set of chromosomes
d) Prophase I – Non-homologous chromosomes are separated
Answer: a

Question: Mark the incorrect pair.
a) Interphase – S-phase
b) M phase – Metaphase
c) Meiosis I – Diplotene
d) Meiosis II – Diakinesis
Answer: d

Question: Which of the following pair is correctly matched?
a) G1 – Second growth phase
b) S – Duplication phase
c) G2 – Synthesis phase
d) G0 – Quiescent stage
Answer: d

Question: In which stage of the cell cycle, histone proteins are synthesized in a eukaryotic cell?
a) During G2 stage of prophase
b) During S-phase
c) During entire prophase
d) During telophase
Answer: b

Question: If you are provided with root-tips of onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into?
a) Metaphase
b) Telophase
c) Anaphase
d) Prophase
Answer: a

Question: Match the description (given in column I) with correct stage of prophase I (given column II) and choose the correct option.
Column I                                                     Column II
A. Chromosomes are moved                      I. Pachytene
to spindle equator
B. Centromere splits and                            II. Zygotene
chromatids apart
C. Pairing between homologous                III. Anaphase
chromosomes takes place
D. Crossing between homologous             IV. Metaphase
chromosomes
(a) A – I; B – II; C – III; D – IV
(b) A – II; B – III; C – IV; D – I
(c) A – IV; B – III; C – II; D – I
(d) A – III; B – I; C – IV; D – II
Answer: c

Question: Which one is correct about crossing over/genetic recombination?
(i) It occurs in tetrad stage which occurs in pachytene of prophase I of meiosis I.
(ii) It occurs between non-sister chromatids of homologous chromosomes.
(iii) It is recombinase enzyme mediated process.
(iv) It is also the reciprocal transfer of genes between the non-homologous chromosomes
(a) All of the above
(b) All except (iv)
(c) (ii), (iii) and (iv)
(d) (iii) and (iv)
Answer: b

Question: Match the terms (given in column I) with their explanation (given in column II) and choose the correct combination from the options given below.
Column I                                     Column II
(Terms)                                     (Explanation)
A. Terminalization             I. Pairing of homologous chromosomes.
B. Synapsis                      II. Point of attachment between homologous chromosomes.
C. Chiasmata                   III. Nuclear protein complex that helps in adherence of sister chromatids and then
                                                  homologous chromosomes.
D. Synaptonemal             IV. Shifting of chiasmata outwards complex towards the ends of a bivalent.
(a) A – IV; B – I; C – II; D – III
(b) A – II; B – III; C – IV; D – I
(c) A – II; B – IV; C – III; D – I
(d) A – IV; B – I; C – III; D – II
Answer: a

Question: Which of the following statement(s) is/are correct about S-phase (synthetic phase) ?
(i) It occurs between G1 and G2 phase.
(ii) It marks the period during which DNA replicates.
(iii) At the end of this phase, DNA is doubled but the number of chromosomes remains unchanged.
(iv) As the DNA is doubled in this phase number of chromosomes is also doubled.
(v) Centrioles replicate in this phase.
(vi) Amount of DNA changes from 2C to 4C.
(a) (i), (ii), (iv), (v), (vi)
(b) (i), (ii), (iii), (v), (vi)
(c) All of the above
(d) Only (iv)
Answer: b

Question: Select the correctly matched pair.
A. S phase – DNA replication
B. Zygotene – Synapsis
C. Diplotene – Crossing over
D. Meiosis – Both haploid and diploid cells
(a) A and B
(b) C and D
(c) B and D
(d) A and C
Answer: a

Question: Read the following statements about cell division and select the correct statements.
(i) M phase represents the phase when actual cell division occurs and I phase represents the phase between two successive M phase.
(ii) In the 24 hours, average duration of cell cycle of a human cell, cell division proper lasts for only about an hour.
(iii) M phase constitutes more than 95% of the duration of cell cycle.
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (i), (ii) and (iii)
Answer: a

Question: Which one is correct about bivalent ?
(i) Bivalent are tetrads.
(ii) A bivalent means 4 chromatids and 2 centromere.
(iii) One bivalent consists of 2 homologous chromosomes each and sister chromatids.
(iv) Bivalents formation occurs in zygotene.
(a) All of these
(b) Only (iii)
(c) (iii) and (iv)
(d) Only (iv)
Answer: a

Question: Which of the following statements related to G0 stage of the cell cycle are correct?
(i) It is a quiescent stage.
(ii) In this phase, cell cycle is stopped.
(iii) G0 cells do not grow or proliferate but metabolically active.
(iv) G0 cells can divide in response to some stimulus.
(a) (i), and (ii)
(b) (i), (ii) and (iii)
(c) Only (i) and (iv)
(d) All of the above
Answer d

Question: Match the description given in column-I with their stapes given in column-II and identify the correct answer.
Column-I                                                Column-II
A. Initiation of the assembly                  I. Anaphase
of mitotic spindle
B. Proteins are synthesized in             II. Prophase
 preparation for mitosis while cell
 growth continues.
C. Spindle fibres attach to                  III. Interphase
 kinetochores of chromosomes.
D. Movement of chromatids               IV. Metaphase
 towards opposite poles
The correct match is
(a) A – II; B – III; C – IV; D – I
(b) A – III; B – II; C – I; D – IV
(c) A – I; B – III; C – II; D – IV
(d) A – IV; B – III; C – I; D – II
Answer: a

Question: Find the correctly matched pairs and choose the correct option.
A. Zygotene – Pairing of homologous chromosomes
B. Pachytene – Dissolution of the complexsynaptonemal takes place
C. Diplotene – Bivalent chromosomes appear as tetrads
D. Diakinesis – Terminalization of chiasmata takes place
(a) A and C
(b) A and D
(c) A and B
(d) B and C
Answer: b