Cell Cycle and Cell Division: NEET MCQ Questions [100+ Solved]

Below are the NEET MCQ questions on Class 11 Biology Chapter Biomolecules” based on the NCERT textbook. Solve the below free NEET mock test for a better understanding of the various topics. 100+ important MCQs (multiple choice questions) are given in this NEET question bank.

“Cell Cycle and Cell Division” is the 10th chapter in the unit “Cell: Structure and Functions” of class XI or class 11th Biology NCERT. Do note that NEET (which is conducted by NTA) is based on NCERT textbooks so they are a must-have. You can also download PDFs of NCERT textbooks.

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  1. Despite the absence of _______ many cells function properly and divide mitotically.
    (a) plasma membrane
    (b) cytoskeleton
    (c) mitochondria
    (d) plastids

(d) plastids

  1. What is the stage of meiosis where the centromere separates?
    (a) metaphase I
    (b) metaphase II
    (c) anaphase I
    (d) anaphase II

(d) anaphase II

  1. When do the chromosomes pair during meiosis I?
    (a) Leptotene
    (b) Zygotene
    (c) Pachytene
    (d) Diplotene

(b) Zygotene

  1. For a single cell to make 128 cells, how many mitotic divisions are needed?
    (a) 7
    (b) 14
    (c) 28
    (d) 64

(a) 7

  1. What is cell division?
    (a) a process that does not involve the co-ordination of various cellular elements
    (b) a process that can occur at any time
    (c) a highly coordinated process
    (d) never precise

(c) a highly coordinated process

  1. During mitosis, what happens to eukaryotic cells?
    (a) Expose the genes for protein synthesis
    (b) Become specialized in structure and function
    (c) Multiply
    (d) Grow

(c) Multiply

  1. During the telophase of mitosis, the mitotic spindle breaks down and nuclear membranes form. Where does the exact opposite take place?
    (a) prophase
    (b) interphase
    (c) metaphase
    (d) S phase

(a) prophase

  1. What is true about the mitotic spindle?
    (a) It is composed of actin and myosin microfilaments.
    (b) It is composed of kinetochores at the metaphase plate.
    (c) It is composed of microtubules, which help separate the chromosomes to opposite poles of the cell.
    (d) It originates only at the centrioles in the centrosomes.

(c) It is composed of microtubules, which help separate the chromosomes to opposite poles of the cell.

  1. If a cell is in mitosis prophase and another cell is in meiosis prophase-I, how can they be distinguished?
    (a) The presence of only half as many chromosomes in the meiotic cell
    (b) The formation of tetrads in the meiotic cell
    (c) The presence of twice as many chromosomes in the meiotic cell
    (d) None of the above

(b) The formation of tetrads in the meiotic cell

  1. Where does meiosis take place?
    (a) Apical meristem
    (b) Intercalary meristem
    (c) Reproductive cells
    (d) Vegetative cells

(c) Reproductive cells

  1. Where does meiosis not occur?
    (a) Ovule
    (b) Anther
    (c) Microsporangia
    (d) Shoot tip

(d) Shoot tip

  1. What number of meiosis is required to produce 100 ovules in angiosperms?
    (a) 125
    (b) 100
    (c) 25
    (d) 75

(b) 100

  1. Where does the synaptonemal complex appear?
    (a) Between homologous chromosomes
    (b) In zygotene stage
    (c) Composed of DNA + protein
    (d) All the above

(d) All the above

  1. A nucleus represents its large size in relation to the cytoplasm of a cell. What does this mean?
    (a) cell is dying
    (b) the nucleolus is in the resting phase
    (c) the nucleus has entered the S-phase of interphase
    (d) cell is about to die

(c) the nucleus has entered the S-phase of interphase

  1. There are several stages in the prophase of reduction division. What is the correct chronological order?
    (a) Leptotene – pachytene – zygotene – diplotene – diakinesis
    (b) Leptotene – diplotene – pachytene – zygotene – diakinesis
    (c) Leptotene – zygotene – diplotene -pachytene – diakinesis
    (d) Leptotene – zygotene – pachytene – diplotene – diakinesis

(d) Leptotene – zygotene – pachytene – diplotene – diakinesis

  1. Ignoring the effect of crossing over, how many different haploid cells arise in a diploid cell having 2n = 12 by meiosis?
    (a) 8
    (b) 16
    (c) 32
    (d) 64

(d) 64

  1. What results in the formation of chiasmata?
    (a) Exchange of parts of paired homologous chromosome
    (b) Exchange of part of unpaired non-homologous chromosome
    (c) Duplication of parts of paired homologous chromosome
    (d) Loss of parts of unpaired non-homologous chromosome

(a) Exchange of parts of paired homologous chromosome

  1. How can we determine number of chromosomes in a zygote?
    (a) 4x
    (b) x
    (c) 3x
    (d) 2x

(d) 2x

  1. What type of chromosomes are present in drosophila larval salivary gland cells?
    (a) polytene
    (b) lampbrush type
    (c) b-type
    (d) normal type

(a) polytene

  1. Which of the following has a short duration?
    (a) Prophase
    (b) Metaphase
    (c) Anaphase
    (d) S-phase

(c) Anaphase

  1. What is the least likely human cell to divide?
    (a) Nerve cell
    (b) Skin cell
    (c) Cancer cell
    (d) Cell from an embryo

(a) Nerve cell

  1. Human ________ are diploid, and human _________ are haploid.
    (a) sex chromosomes …… autosomes
    (b) autosomes ……. sex chromosomes
    (c) somatic cells ……. gametes
    (d) gametes ……. somatic cells

(c) somatic cells ………. gametes

  1. When do RNA and protein synthesis take place during the cell cycle?
    (a) G1 and G2 – phase
    (b) S – phase
    (c) M – phase
    (d) Cytokinesis

(a) G1 and G2 – phase

  1. What is true about the somatic cell cycle?
    (a) DNA replication takes place in S-phase
    (b) A short interphase is followed by a long mitotic phase
    (c) G2 phase follows mitotic phase
    (d) In G1 phase DNA content is double the amount of DNA present in the original cell

(a) DNA replication takes place in S-phase

  1. The entry of the cell to which phase makes it very difficult to stop cell division?
    (a) G1-phase
    (b) G2-phase
    (c) S-phase
    (d) prophase

(c) S-phase

  1. Which of the following statement is true?
    (a) DNA is synthesized throughout the cell cycle
    (b) Cell division is inhibited by cytokinin
    (c) Chromosomes are condensed at S – stage
    (d) Only extrachromosomal DNA is replicated at any stage of the cell cycle

(d) Only extrachromosomal DNA is replicated at any stage of the cell cycle

  1. In the G2 stage of the cell cycle, how much DNA is present in chromosomes?
    (a) One
    (b) Two
    (c) Four
    (d) Eight

(c) Four

  1. Reduction in the duration of what results in increased the rate of mitosis by Kinetin (Cytokinin)?
    (a) Interphase
    (b) Metaphase
    (c) Anaphase
    (d) Telophase

(a) Interphase

  1. The process of mitosis is divided into 4 phases. Determine the correct order in which these phases occur during mitosis.
    (a) Anaphase, metaphase, telophase and prophase
    (b) Telophase, anaphase, metaphase and prophase
    (c) Metaphase, prophase, anaphase and telophase
    (d) Prophase, metaphase, anaphase and telophase

(d) Prophase, metaphase, anaphase and telophase

  1. During which phase of mitosis are the chromosomes arranged around the spindle’s equator?
    (a) Prophase
    (b) Metaphase
    (c) Anaphase
    (d) Telophase

(b) Metaphase

  1. During the M-phase of the cell cycle, which of the following occurs before the reformation of the nuclear envelope?
    (a) Decondensation from chromosomes and reassembly of the nuclear lamina.
    (b) Transcription from chromosomes and reassembly 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.

(a) Decondensation from chromosomes and reassembly of the nuclear lamina.

  1. In which stages (or prophase I substages) of meiosis should bivalents and DNA replication be observed respectively?
    (a) Pachytene and interphase (between two meiotic divisions)
    (b) Pachytene and interphase (just before prophase I)
    (c) Pachytene and S phase (of interphase just before prophase I)
    (d) Zygotene and S phase (of interphase before prophase I)

(d) Zygotene and S phase (of interphase before prophase I)

  1. To form 200 grains of wheat, what is the number of reduction divisions required?
    (a) 250
    (b) 150
    (c) 200
    (d) 360

(a) 250

  1. A yeast cell divides approximately once every?
    (a) 90 minutes
    (b) 9 minutes
    (c) 24 hours
    (d) 24 days

(a) 90 minutes

  1. How can a cell in the prophase of mitosis be distinguished from a cell in prophase-I of meiosis?
    (a) The presence of only half as many chromosomes in the meiotic cell
    (b) The formation of tetrads in the meiotic cell
    (c) The presence of twice as many chromosomes in the meiotic cell
    (d) None of the above

(b) The formation of tetrads in the meiotic cell

  1. At which stage do histone proteins become synthesized in a eukaryotic cell?
    (a) During the G-2 stage of prophase
    (b) During S-phase
    (c) During the entire prophase
    (d) During telophase

(b) During S-phase

  1. Between what two do synapsis occur?
    (a) mRNA and ribosomes
    (b) spindle fibres and centromere
    (c) two homologous chromosomes
    (d) a male and a female gamete

(c) two homologous chromosomes

  1. At what stage during mitosis do ER and nucleolus begin to disappear?
    (a) late prophase
    (b) early metaphase
    (c) late metaphase
    (d) early prophase

(d) early prophase

  1. What is true about kinetochores?
    (a) They are localized at the centromere of each chromosome.
    (b) They are the sites where microtubules attach to separate the chromosomes.
    (c) They are organized so that there is one per sister chromatid in meiosis.
    (d) All of the above

(d) All of the above

  1. When a cell enters _________ it is bound to divide.
    (a) G2 – phase
    (b) G1 – phase
    (c) Prophase
    (d) S – phase

(d) S – phase

  1. At mitotic anaphase, how many chromosomes shall be present in a diploid cell if its egg cell has ten chromosomes?
    (a) 10
    (b) 20
    (c) 30
    (d) 40

(d) 40

  1. During which phase of karyokinesis do chromosomes exhibit a high degree of coiling?
    (a) Prophase
    (b) Metaphase
    (c) Telophase
    (d) Interphase

(b) Metaphase

  1. All body cells receive genetic information from the zygote by?
    (a) Meiosis
    (b) Amitosis
    (c) Endomitosis
    (d) Mitosis

(d) Mitosis

  1. Where does active mitosis occur in plants?
    (a) Cambium
    (b) Leaf tip
    (c) Root base
    (d) Mid vein

(a) Cambium

  1. What is the gap between meiosis – I and II called?
    (a) Interphase
    (b) Interkinesis
    (c) Diakinesis
    (d) Metakinesis

(b) Interkinesis

  1. What is centromere required for?
    (a) Movement of chromosomes towards poles
    (b) Cytoplasmic cleavage
    (c) Crossing over
    (d) Transcription

(a) Movement of chromosomes towards poles

  1. A chromosome has how many chromatids at anaphase?
    (a) 2 in mitosis and 1 in meiosis
    (b) 1 in mitosis and 2 in meiosis
    (c) 2 each in mitosis and meiosis
    (d) 2 in mitosis and 4 in meiosis

(b) 1 in mitosis and 2 in meiosis

  1. In your class, if you are asked to count the chromosomes of a root tip onion, which stage is most convenient to look at?
    (a) Telophase
    (b) Anaphase
    (c) Prophase
    (d) Metaphase

(d) Metaphase

  1. A bivalent is an association of what in meiosis I?
    (a) Four chromatids and four centromeres
    (b) Two chromatids and two centromeres
    (c) Two chromatids and four centromeres
    (d) Four chromatids and two centromeres

(d) Four chromatids and two centromeres

  1. What is the complex formed by a pair of synapsed homologous chromosomes called?
    (a) Kinetochore
    (b) Bivalent
    (c) Axoneme
    (d) Equatorial plate

(b) Bivalent

  1. Where do spindle fibres attach to chromosomes during the metaphase stage of mitosis?
    (a) Centromere
    (b) Kinetochore
    (c) Both centromere and kinetochore
    (d) Centromere, kinetochore and areas adjoining centromere

(b) Kinetochore

  1. When do chromosomes start pairing during meiosis I?
    (a) Leptotene
    (b) Zygotene
    (c) Pachytene
    (d) Diplotene

(b) Zygotene

  1. What is not a part of Anaphase-I?
    (a) Segregation of homologous chromosomes
    (b) Contraction in spindle
    (c) Poleward movement of chromosomes
    (d) Division of centromere

(d) Division of centromere

  1. When do homologous chromosomes show maximum attraction?
    (a) Leptotene
    (b) Zygotene
    (c) Pachytene
    (d) Diplotene

(c) Pachytene

  1. What happens in meiosis?
    (a) Division of nucleus twice but replication of DNA only once
    (b) Division of nucleus twice and replication of DNA twice
    (c) Division of nucleus once and replication of DNA is also once
    (d) Division of nucleus once and DNA – replication is twice

(a) Division of nucleus twice but replication of DNA only once

  1. The two chromatids of a chromosome after meiosis – I are
    (a) Genetically similar
    (b) Genetically different
    (c) There occurs only one chromatid in each chromosome
    (d) None of the above

(b) Genetically different

  1. At what stage of meiosis does the number of chromosomes reduce to half?
    (a) Anaphase-I
    (b) Anaphase-II
    (c) Telophase-I
    (d) Telophase-II

(a) Anaphase-I

  1. When does the recombination of genes occur?
    (a) prophase in mitosis
    (b) prophase I in meiosis
    (c) prophase II in meiosis
    (d) metaphase II in meiosis

(b) prophase I in meiosis

  1. The cell enters a stage called _________ when synapsis is complete along both chromosomes.
    (a) Zygotene
    (b) Pachytene
    (c) Diplotene
    (d) Diakinesis

(b) Pachytene

  1. If n =16 in a plant cell then what is possible in metaphase – I of meiosis?
    (a) 32 bivalents
    (b) 16 tetravalents
    (c) 16 bivalents
    (d) 32 bivalents

(c) 16 bivalents

  1. In anaphase – II of meiosis, how much DNA is present on each chromosome?
    (a) 4 DNA
    (b) 3 – DNA
    (c) 2 – DNA
    (d) 1 – DNA

(d) 1 – DNA

  1. In which stage is each chromosome composed of one chromatid?
    (a) Anaphase – I
    (b) Anaphase – II
    (c) Metaphase – I
    (d) Metaphase – II

(b) Anaphase – II

  1. During which phase are recombinant nodules found?
    (a) Anaphase
    (b) Prophase
    (c) Telophase
    (d) Metaphase

(b) Prophase

  1. Four daughter cells are formed after meiosis. They are
    (a) Genetically similar
    (b) Genetically different
    (c) Anucleate
    (d) Multinucleate

(b) Genetically different

  1. Animal mitotic cell division does not perform which of the following functions?
    (a) Asexual reproduction
    (b) Growth
    (c) Repair of damaged organs
    (d) Production of gametes

(d) Production of gametes

  1. How do the chromosomes appear in the pachytene stage of meiosis?
    (a) Single-stranded
    (b) Double-stranded
    (c) Three stranded
    (d) Four stranded

(d) Four stranded

  1. At what stage of meiosis are sister chromatids aligned at the spindle equator in two cells?
    (a) Anaphase II
    (b) Metaphase II
    (c) Metaphase I
    (d) Anaphase I

(b) Metaphase II

  1. Select the correct option for 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 the equatorial plate in metaphase

(d) Chromosomes move to the spindle equator and get aligned along the equatorial plate in metaphase

  1. What attaches chromosomes to the spindle fibres during metaphase?
    (a) satellites
    (b) secondary constrictions
    (c) kinetochores
    (d) centromere

(c) kinetochores

  1. Lack of centrioles in higher plant cells means that during somatic cell division, there is?
    (a) no apparent organiser of mitotic spindles.
    (b) no equatorial arrangement of chromosomes at metaphase.
    (c) no new cell wall is laid down at telophase.
    (d) no spindle formed

(a) no apparent organiser of mitotic spindles.

  1. During the G1 phase of cell division, what happens?
    (a) RNA and proteins are synthesized
    (b) DNA and proteins are synthesized
    (c) Cell prepares for M-phase
    (d) Cell undergoes duplication

(a) RNA and proteins are synthesized

  1. When does chiasmata formation occur?
    (a) Diplotene
    (b) Leptotene
    (c) Pachytene
    (d) Diakinesis

(a) Diplotene

  1. What is unique to mitosis and not a part of meiosis?
    (a) Homologous chromosomes behave independently
    (b) Chromatids are separated during anaphase
    (c) Homologous chromosomes pair and form bivalents
    (d) Homologous chromosomes crossover

(a) Homologous chromosomes behave independently

  1. Sister chromatids
    (a) cross over during prophase I of meiosis.
    (b) separate during the first meiotic division.
    (c) are produced during the S phase between cell divisions.
    (d) cross over during prophase II of meiosis.

(a) cross over during prophase I of meiosis.

  1. During mitosis, what is not seen in somatic cells?
    (a) Spindle fibres
    (b) Chromosome movement
    (c) Disappearance of the nucleolus
    (d) Synapsis

(d) Synapsis

  1. In a eukaryotic cell cycle, what does the “G0” state of cells mean?
    (a) Checkpoint before entering the next phase
    (b) Pausing in the middle of a cycle to cope with a temporary delay
    (c) Death of a cell
    (d) Exit of cells from the cell cycle

(b) Pausing in the middle of a cycle to cope with a temporary delay

  1. In vertebrates, what phase of cell division is arrested in the oogonia?
    (a) Anaphase II
    (b) Interphase
    (c) Diplotene
    (d) Both prophase I and II

(c) Diplotene

  1. Which of the following is a correct match between a phase of the cell cycle and its description?
    (a) M – duplication of DNA
    (b) S – immediately precedes cell division
    (c) G2 – cell division
    (d) G1 – immediately follows cell division

(d) G1 – immediately follows cell division

  1. When anaphase occurs, which type of chromosome appears ‘L’-shaped?
    (a) Telocentric
    (b) Acrocentric
    (c) Metacentric
    (d) Submetacentric

(d) Submetacentric

  1. During cytokinesis, a contractile mid-body is formed in which of the following?
    (a) Animals
    (b) Higher plants
    (c) Fungi
    (d) Algae

(a) Animals

  1. In the life cycle, which two events restore the normal number of chromosomes?
    (a) Mitosis and Meiosis
    (b) Meiosis and fertilisation
    (c) Fertilisation and mitosis
    (d) Only meiosis

(b) Meiosis and fertilisation

  1. What causes the constancy of chromosome numbers in sexually producing generations?
    (a) Meiosis
    (b) Mitosis
    (c) Amitosis
    (d) None of these

(b) Mitosis

  1. When does the centromere divide during meiosis?
    (a) Prophase-I
    (b) Metaphase-I
    (c) Anaphase-I
    (d) Anaphase-II

(d) Anaphase-II

  1. Where do four chromatids and two homologous centromeres occur?
    (a) Zygotene
    (b) Diplotene
    (c) Diakinesis
    (d) Pachytene

(a) Zygotene

  1. Sometimes, sister chromatids fail to separate during cell division. What is this event called?
    (a) Interference
    (b) Complementation
    (c) Coincidence
    (d) Non-disjunction

(d) Non-disjunction

  1. What happens to the centromeres during the first metaphase of meiosis?
    (a) Undergo division
    (b) Do not divide
    (c) Divide but do not separate
    (d) Are not identical

(b) Do not divide

  1. If a cell receives the correct signal at a checkpoint during the __ phase of the cell cycle, it will divide.
    (a) M
    (b) G1
    (c) S
    (d) G2

(b) G1

  1. There is a difference between meiosis and mitosis differ because in meiosis
    (a) The four nuclei formed are not similar to the parental ones
    (b) Homologous chromosomes pair are exchange parts
    (c) Number of chromosomes gets halved
    (d) All of the above

(d) All of the above

  1. Where is prophase longer?
    (a) Mitosis
    (b) Meiosis
    (c) Equal in both
    (d) Amitosis

(b) Meiosis

  1. At which stage does colchicine prevent mitosis of cells?
    (a) Anaphase
    (b) Metaphase
    (c) Prophase
    (d) Interphase

(c) Prophase

  1. What is the composition of the spindle fibres of mitotic cells?
    (a) tubulin
    (b) actin
    (c) myosin
    (d) collagen

(a) tubulin

  1. In the case of complete synapsis throughout the chromosome, the cell is said to have entered a stage known as?
    (a) zygotene
    (b) pachytene
    (c) diplotene
    (d) diakinesis

(b) pachytene

  1. Where does the condensation of chromosomes happen?
    (a) Prophase I
    (b) Prophase II
    (c) Anaphase
    (d) Metaphase

(c) Anaphase

  1. During which phase do the microtubules from opposite poles of the spindle attach to the kinetochores of sister chromatids?
    (a) Prophase II
    (b) Metaphase II
    (c) Anaphase II
    (d) None of these

(b) Metaphase II

  1. During meiosis, crossing over occurs at four strand stages. Which observation proves this?
    (a) rarely all four gametes resulting from a meiotic division could be recombinants
    (b) usually, only two gametes resulting from meiotic division could be recombinants
    (c) chiasmata are seen only at the four-strand stage.
    (d) occasionally none of the four gametes resulting from meiosis could be recombinant.

(b) usually, only two gametes resulting from meiotic division could be recombinants

  1. The karyotype of all cells in a multicellular body is the same because the body evolved from a zygote by what division?
    (a) meiotic and mitotic divisions
    (b) only mitotic divisions
    (c) only meiotic divisions
    (d) mitotic and amitotic divisions

(b) only mitotic divisions

  1. In which phase is cell division arrested by colchicine, a mitotic poison?
    (a) G1 – phase
    (b) G2 – phase
    (c) Anaphase
    (d) Metaphase

(d) Metaphase

  1. When a cell undergoes meiosis, what type of chromosomes segregate?
    (a) Homologous chromosomes
    (b) Non-homologous chromosomes
    (c) Both (a) and (b)
    (d) centric and acentric chromosomes

(a) Homologous chromosomes

  1. In Anaphase, what is the reason for chromosomal movement?
    (a) Astral rays
    (b) Centrioles
    (c) Kinetochore
    (d) Kinetochore and spindle fibres

(d) Kinetochore and spindle fibres

  1. In which sub-stages of prophase I do “Bouquet-stage” occur?
    (a) Leptotene
    (b) Zygotene
    (c) Pachytene
    (d) Diplotene

(a) Leptotene

  1. When chromosomes are duplicated without the nucleus being divided, what is it called?
    (a) Cytokinesis
    (b) Plasmotomy
    (c) Endomitosis
    (d) Dino-mitosis

(c) Endomitosis

  1. Genetic similarity is maintained by which division?
    (a) Mitosis
    (b) Meiosis
    (c) Amitosis
    (d) Reduction division

(a) Mitosis

  1. In prophase, which does not occur?
    (a) Hydration of chromatin
    (b) Dehydration of chromatin
    (c) Appearance of chromosome
    (d) Disappearance of nuclear membrane and nucleolus

(a) Hydration of chromatin

  1. Number of chromosomes is best counted in which stage of cell division?
    (a) Prophase
    (b) Metaphase
    (c) Telophase
    (d) Interphase

(b) Metaphase

  1. Why is the second meiotic division necessary when the number of chromosomes has already been reduced to half in the first reductional division of meiosis?
    (a) The division is required for the formation of four gametes
    (b) Division ensures equal distribution of haploid chromosomes
    (c) Division ensures equal distribution of genes on chromosomes
    (d) Division is required for the segregation of replicated chromosomes

(d) Division is required for the segregation of replicated chromosomes

  1. During mitosis, what cellular structure disappears?
    (a) Plasma membrane
    (b) Nuclear membrane
    (c) Mitochondria
    (d) Nuclear membrane and nucleolus

(d) Nuclear membrane and nucleolus

  1. Blue-green algae’s cell division is similar to that of?
    (a) Bacteria
    (b) Brown algae
    (c) Green algae
    (d) Higher plants

(a) Bacteria

  1. Which phase of gamete formation involves the enzyme recombinase?
    (a) Metaphase – I
    (b) Anaphase – II
    (c) Prophase – I
    (d) Prophase – II

(c) Prophase – I

  1. When do homologous chromosomes separate during meiosis?
    (a) Metaphase I
    (b) Metaphase II
    (c) Anaphase I
    (d) Anaphase II

(c) Anaphase I

  1. During the M phase of the cell cycle, what occurs before the re-formation of the nuclear envelope?
    (a) Formation of the contractile ring, and formation of the phragmoplast.
    (b) Formation of the contractile ring, and transcription from chromosomes.
    (c) Decondensation of chromosomes, and reassembly of the nuclear lamina.
    (d) Transcription from chromosomes, and reassembly of the nuclear lamina.

(c) Decondensation of chromosomes, and reassembly of the nuclear lamina.

  1. What is the most significant difference between mitosis and meiosis?
    (a) Chromosomes are duplicated before mitosis.
    (b) Meiosis is not followed by cytokinesis.
    (c) Homologous pairs of chromosomes are split up in meiosis.
    (d) A spindle formed of microtubules moves the chromosomes in mitosis.

(c) Homologous pairs of chromosomes are split up in meiosis.

  1. Which meiotic stage is associated with the separation of homologous chromosomes and the association of sister chromatids at their centromeres?
    (a) Metaphase I
    (b) Metaphase II
    (c) Anaphase I
    (d) Anaphase II

(c) Anaphase I

  1. How does a diploid living organism develop from a zygote by repeated cell divisions?
    (a) Meiosis
    (b) Amitosis
    (c) Mitosis
    (d) Segmentation

(c) Mitosis

  1. The difference between cytokinesis and karyokinesis is that karyokinesis involves?
    (a) Division of cytoplasm
    (b) Division of the nucleus and cytoplasm
    (c) Division of the nucleus
    (d) Division of the cell

(c) Division of the nucleus

  1. What gametes will be produced in the meiosis of AaBb?
    (a) AB, aB, Ab, ab
    (b) AB, ab
    (c) Aa, bb
    (d) Aa, Bb

(a) AB, aB, Ab, ab

  1. In culture, the cell cycle in human cells is complete in approximately?
    (a) 42 hours
    (b) 24 hours
    (c) 24 minutes
    (d) 24 seconds

(b) 24 hours

  1. How many mitotic divisions are required to form 256 cells within a root tip cell?
    (a) 256
    (b) 8
    (c) 128
    (d) 64

(b) 8

  1. What causes the nucleolus to disappear at the end of prophase?
    (a) its enzymatic dissolution into its macromolecules
    (b) its dispersion into the cytoplasm
    (c) its dispersion into the nucleoplasm
    (d) its poor stainability

(b) its dispersion into the cytoplasm

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