NEET Biology Cell Cycle and Cell Division MCQs Set B

Question: How many generations are required by a cell of meristem to produce 128 cells?

• a) 7
• b) 32
• c) 64
• d) 127

Answer: 7

Question: Select the correct match

• a) Reformation of ER and golgi complex – Telophase
• b) Polar movement of chromatids – S-phase
• c) Invisible phase of cell cycle – Metaphase
• d) Recombination nodules formation – Zygotene

Answer: Reformation of ER and golgi complex – Telophase

Question: Phragmoplast is formed by golgi complex and grows

• a) Centrifugally to form cell plate
• b) Centrifugally to form a cleavage furrow
• c) Centripetally to form cell plate
• d) Centripetally to produce a cleavage furrow

Answer: Centrifugally to form cell plate

Question: Spireme stage of chromosomes is associated with

• a) Early prophase
• b) Late prophase
• c) Metaphase
• d) Telophase

Answer: Early prophase

Question: Which one of the following is correct for mitosis in most of the plants member?

• a) Anastral, acentric and eumitosis
• b) Amphiastral, anastral and eumitosis
• c) Anastral, acentric and premitosis
• d) Astral, centric and eumitosis

Answer:  Anastral, acentric and eumitosis

Question: Spindle fibres are made up of

• a) Alpha & beta tubulin
• b) Flagellin
• c) Myosin
• d) Actin

Answer: Alpha & beta tubulin

Question: Cytokinesis in a plant cell is achieved by the formation of cell plate instead of a cleavage furrow, which is formed in

• a) Centrifugal manner
• b) Equational manner
• c) Centripetal manner
• d) Both centripetal and centrifugal manner

Answer: Centrifugal manner

Question: Select an incorrect statement w.r.t. metaphase

• a) The plane of alignment of the homologous pair of chromosomes at metaphase is referred to as the metaphasic plate
• b) Spindle fibres are attached to small disc shaped structures at the surface of centromeres called kinetochores
• c) Chromosome appears to be made up of two sister chromatids
• d)  The size of chromosomes can be studied in this phase

Answer: The plane of alignment of the homologous pair of chromosomes at metaphase is referred to as the metaphasic plate

Question: All are the essential stages that take place during meiosis, except

• a) Number of chromosomes in daughter cells after meiosis II is reduced to half but the amount of DNA remains the same
• b) Segregation of homologous chromosomes
• c) Formation of chiasmata and crossing over
• d) Two successive divisions without any DNA replication occuring between them

Answer: Number of chromosomes in daughter cells after meiosis II is reduced to half but the amount of DNA remains the same

Question: Two successive divisions without any DNA replication occuring between them

• a) First division is reductional, and second is equational
• b) First division is equational, second is reductional
• c) Both divisions are reductional
• d) Both divisions are equational

Answer: First division is reductional, and second is equational

Question: If egg of an organism has 10 Pg of DNA in its nucleus. How much DNA would a diploid cell of same organism have in G₂ phase of meiosis?

• a) 40 Pg
• b) 20 Pg
• c) 5 Pg
• d) 10 Pg

Answer: 40 Pg

Question: To produce 102 pollen grains, how many meiotic divisions are required?

• a) 26
• b) 27
• c) 25.5
• d) 25

Answer:  26

Question: Find out the wrong statement

• a) Synaptonemal complex and nuclear membrane completely disappear in diplotene
• b) Interkinesis is generally short lived
• c) Each metaphasic plate in heterotypic division of meiosis contains half the number of diploid set of chromosomes
• d) Homologous chromosomes move to respective poles in anaphase-I

Answer: Synaptonemal complex and nuclear membrane completely disappear in diplotene

Question: What will be the content of DNA in a somatic cell at G₂ if its meiotic products have 20 picogram of DNA?

• a) 80 Pg
• b) 160 Pg
• c)  20 Pg
• d) 40 Pg

Answer: 80 Pg

Question: All chromosomes of a cell are directed towards one side and are attached to the nuclear membrane, can be observed in

• a) Leptotene
• b) Zygotene
• c) Pachytene
• d) Diplotene

Answer: Leptotene

Question:  Diplotene phase of meiosis is also characterised by

a. Desynapsis
b. Complete terminalisation of chiasmata
c. Dictyotene stage
d. Complete disappearance of nuclear membrane and nucleoli
e. Complete development of astral rays and aster
f. Longest phase of prophase-I

• a) a, c and f
• b) b, d and f
• c) b, d, e and f
• d) a, b, c and e

Answer: a, c and f

Question: The recombination nodules which mediate for chromosome recombination appear at intervals on the synaptonemal complex during

• a) Pachytene stage
• b) Diplotene stage
• c) Meiosis
• d) Zygotene stage

Answer: Pachytene stage

Question: In oocytes, which stage can last for months or years, since at this stage the chromosomes decondense and are engaged in RNA synthesis

• a) Diplotene
• b) Intrameiotic interphase
• c) Telophase-I
• d) Diakinesis

Answer:  Diplotene

Question: When synapsis is complete all along the chromosome, the cells are said to have entered a stage of prophase I, where exchange of genetic material takes place between homologous chromosomes. The stage is called as

• a) Pachytene
• b) Zygotene
• c) Diplotene
• d) Diakinesis

Answer: Pachytene

Question: The beginning of which stage of prophase is marked by complete terminalisation of chiasmata and inhibition of RNA synthesis?

• a) Diakinesis
• b) Zygotene
• c) Diplotene
• d) Pachytene

Answer: Diakinesis 

Question: What will be the amount of DNA in a pollen grain if its mother cell has 32 picogram DNA in G₂ phase?

• a) 8 Pg
• b) 4 Pg
• c) 32 Pg
• d) 16 Pg

Answer: 8 Pg

Question: The paradox of meiosis is

• a) Conservation of specific chromosome number from generation to generation
• b) Produces four haploid cells after meiosis II
• c) It is a double division
• d) Does not involve DNA replication

Answer: Conservation of specific chromosome number from generation to generation

Question: Most organelles show duplication in cell cycle during

• a) G₁-phase
• b) G₀-phase
• c) S-phase
• d) G₂-phase

Answer: G₁-phase

Question:  Best stages to study morphology and shape of chromosome are respectively

• a) Metaphase, Anaphase
• b) Prophase, Anaphase
• c) Metaphase, Telophase
• d) Teophase, Anaphase

Answer:  Metaphase, Anaphase

Question: Temporarily suspended stage of diplotene during meiosis-I is

• a) Dictyotene
• b) Pachytene
• c) Diakinesis
• d) Leptotene

Answer:  Dictyotene

Question:

• a) a(ii), b(iii), c(v), d(iv)
• b) a(i), b(ii), c(v), d(iv)
• c) a(ii), b(i), c(iii), d(iv)
• d) a(ii), b(iii), c(iv), d(v)

Answer: a(ii), b(iii), c(v), d(iv)

Question: In 'S' phase of the cell cycle

• a) Amount of DNA doubles in each cell
• b) Chromosome number is increased
• c) Amount of DNA remains same in each cell
• d) Amount of DNA is reduced to half in each cell

Answer: Amount of DNA doubles in each cell

Question: The enzyme recombinase is required at which stage of meiosis

• a) Pachytene
• b) Zygotene
• c) Diplotene
• d) Diakinesis

Answer:  Pachytene

Question:  A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics

• a)

  

• b)

  

• c)

  

• d) None of these

Answer:

Question: The complex formed by a pair of synapsed homologous chromosomes is called

• a) Bivalent
• b) Kinetochore
• c) Axoneme
• d) Equatorial plate

Answer: Bivalent

Question: Meiosis takes place in

• a) Meiocyte
• b) Megaspore
• c) Gemmule
• d) Conidia

Answer: Meiocyte

Question: During gamete formation, the enzyme recombinase participates during

• a) Prophase – I
• b) Prophase – II
• c) Metaphase – I
• d) Anaphase – II

Answer: Prophase – I

Question:

• a) Prophase I during meiosis
• b) Prophase of Mitosis
• c) Both prophase and metaphase of mitosis
• d) Prophase II during meiosis

Answer: Prophase I during meiosis

Question: Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres

• a) Anaphase I
• b) Anaphase II
• c) Metaphase II
• d) Metaphase I

Answer: Anaphase I

Question: Select the correct option with respect to mitosis

• a) Chromosomes move to the spindle equator and get aligned along euatorial plate in metaphase
• b) Chromatids separate but remain in the centre of the cell in anaphase
• c) Choromatids start moving towards opposite poles in telophase
• d) Golgi complex and endoplasmic reticulum are still visible at the end of prophase

Answer:  Chromosomes move to the spindle equator and get aligned along euatorial plate in metaphase

Question: At metaphase, chromosomes are attached to the spindle fibres by their

• a) Kinetochores
• b) Satellites
• c) Centromere
• d) Secondary constrictions

Answer: Kinetochores

Question: During mitosis ER and nucleolus begin to disappear at

• a) Late prophase
• b) Early metaphase
• c) Late metaphase
• d) Early prophase

Answer:  Late prophase

Question:

• a) Late Anaphase — Prophase
• b) Metaphase — Telophase
• c) Prophase — Anaphase
• d) Telophase — Metaphase

Answer: Late Anaphase — Prophase

Question:

• a) D-Synthetic phase
• b) A-Cytokinesis
• c) B-Metaphase
• d) C-Karyokinesis

Answer: D-Synthetic phase

Question: Synapsis occurs between

• a) Two homologous chromosomes
• b) mRNA and ribosomes
• c) Spindle fibres and centromere
• d) A male and a female gamete

Answer: Two homologous chromosomes

Question: At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell ?

• a) During S-phase
• b) During entire prophase
• c) During telophase
• d) During G₂ stage of prophase

Answer: During S-phase

Question: Centromere is required for

• a) Movement of chromosomes towards poles
• b) Crossing over
• c) Transcription
• d) Cytoplasmic cleavage

Answer: Movement of chromosomes towards poles

Question: Comparing small and large cells, which statement is correct?

• a) Small cells have a large surface area per volume ratio
• b) Exchange rate of nutrients is fast with large cells
• c) Small cells have a small surface area per volume ratio
• d) Exchange rate of nutrients is slow with small cells

Answer: Small cells have a large surface area per volume ratio

Question: In a somatic cell cycle, DNA synthesis takes place in

• a) S-phase
• b) Prophase of mitosis
• c) G₁ phase
• d) G₂ phase

Answer:  S-phase

Question: In the somatic cell cycle

• a) DNA replication takes place in S-phase
• b) In G₁ phase, DNA content is double the amount of DNA present in the original cell
• c) A short interphase is followed by a long mitotic phase
• d) G₂ phase followed by mitotic phase

Answer:  DNA replication takes place in S-phase

Question:

• a) Metaphase – chromosomes moved to spindle equator chromosomes made up of two sister chromatids
• b) Metaphase – spindle fibres attached to kinetochores, centromeres split and chromatids separate
• c) Late prophase – chromosomes move to spindle equator
• d) Anaphase – centromeres split and chromatids separate and start moving away

Answer: Metaphase – chromosomes moved to spindle equator chromosomes made up of two sister chromatids

Question: How many chromosomes will the cell have at G₁, after S and after M phase respectively, if it has 14 chromosomes at interphase?

• a) 14, 14, 14
• b) 7, 7, 7
• c) 7, 14, 14
• d) 14, 14, 7

Answer: 14, 14, 14

Question: Which of the following represents the best stage to view the shape, size and number of chromosomes?

• a) Metaphase
• b) Interphase
• c) Prophase
• d) Telophase

Answer: Metaphase

Question: Each chromosome at the anaphase stage of a bone marrow cell in our body has

• a) Only one chromatid
• b) Several chromatids
• c) No chromatids
• d) Two chromatids

Answer:  Only one chromatid

Question: Colchicine is an inhibitory chemical, which

• a) Prevents the spindle formation in mitosis
• b) Stops the functioning of centriole
• c) Prevents attaching of centromeres with rays
• d) Prevents the formation of equatorial plane

Answer: Prevents the spindle formation in mitosis

Question: During cell division in apical meristem, the nuclear membrane appears in

• a) Telophase
• b)  Cytokinesis
• c) Metaphase
• d) Anaphase

Answer: Telophase

Question: How many mitotic divisions are needed for a single cell to make 128 cells?

• a) 127
• b) 14
• c) 32
• d) 28

Answer: 127

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

• a) Centriole
• b) Spindle fibre
• c) Cell plate
• d) Cell plate

Answer: Centriole

Question: A bacterium divides every 35 minutes. If a culture containing 105 cells per ml is grown for 175 minutes, what will be the cell concentration per ml after 175 minutes?

• a) 32 × 10⁵ cells
• b) 175 × 10⁵ cells
• c) 85 × 10⁵ cells
• d) 35 × 10⁵ cells

Answer: 32 × 10⁵ cells

Question: Spindle fibre unite with which structure of chromosomes?

• a) Kinetochore
• b) Centriole
• c) Chromomere
• d) Chromocentre

Answer: Kinetochore

Question: Best material for the study of mitosis in laboratory is

• a) Root tip
• b) Leaf tip
• c) Ovary
• d) Anther

Answer: Root tip

Question: If a diploid cell is treated with colchicine then it becomes

• a) Tetraploid
• b) Diploid
• c) Monoploid
• d) Triploid

Answer: Tetraploid

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: Metaphase

Question: Which one of the following precedes re-formation of the nuclear envelope during M phase of the cell cycle?

• a) Formation of the contractile ring, and formation of the phragmoplast
• b) Transcription from chromosomes, and reassembly of the nuclear lamina
• c) Decondensation from chromosomes, and reassembly of the nuclear lamina
• d) Formation of the contractile ring, and transcription from chromosomes

Answer: Formation of the contractile ring, and formation of the phragmoplast

Question: In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains?

• a) 25
• b) 50
• c) 100
• d) 75

Answer: 25

Question: If there are 4 pollen mother cells in anthers, what will be the number of pollen grains?

• a) 16
• b) 12
• c) 8
• d) 4

Answer:  16

Question:  A gymnospermic leaf carries 16 chromosomes. The number of chromosomes in its endosperm will be

• a) 8
• b) 16
• c) 24
• d)  12

Answer: 8

Question: The term “Meiosis” was given by

• a) Farmer and Moore
• b) Johansen
• c) Knoll and Ruska
• d) A. Flemming

Answer: Farmer and Moore

Question: What will be DNA amount in Meiotic II products if DNA is 20 picogram in meiocyte at G₂-stage?

• a) 5 Pg
• b) 10 Pg
• c) 20 Pg
• d) 40 Pg

Answer:  5 Pg

Question: Crossing over in diploid organism is responsible for

• a) Recombination of linked alleles
• b) Linkage between genes
• c) Segregation of alleles
• d) Dominance of genes

Answer: Recombination of linked alleles

Question: In ferns, meiosis takes place at the time of

• a) Spore formation
• b) Spore germination
• c) Antheridia and archegonia formation
• d) Gamete formation

Answer: Spore formation

Question: In grasses what happens in microspore mother cell for the formation of mature pollen grains?

• a) One meiotic and two mitotic divisions
• b) One meiotic division
• c) One meiotic and one mitotic divisions
• d) One mitotic division

Answer: One meiotic and two mitotic divisions

Question: Mitotic spindle is mainly composed of which protein?

• a) Tubulin
• b) Myoglobin
• c) Myosin
• d) Actin

Answer: Tubulin

Question: Crossing over that results in genetic recombination in higher organisms occurs between

• a) Non-sister chromatids of a bivalent
• b) Two different bivalents
• c) Sister chromatids of a bivalent
• d) Two daughter nuclei

Answer: Non-sister chromatids of a bivalent

Question: During mitosis ER and nucleolus begin to disappear at

• a) Late prophase
• b) Early metaphase
• c) Late metaphase
• d) Early prophase

Answer: Late prophase