NEET Biology Cell Cycle and Cell Division MCQs Set A

Question: The sequence of events by which cells duplicate their genome, synthesize the other components of cell which eventually distribute into two daughter cells is called

• a) Cell cycle
• b) Kinetochore
• c) Generation time
• d) Quiescent stage

Answer: Cell cycle

Question: DNA replication occurs in

• a) S phase
• b) M phase
• c) G₂ phase
• d) G₁ phase

Answer: S phase

Question: The phase between the two successive M phase is called as

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

Answer: Interphase

Question: A biosynthetic phase where cell organelle duplicate itself is

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

Answer: Interphase

Question: Yeast can progress through the cell cycle in about

• a) 90 min
• b) 90 hrs
• c) 90 yrs
• d) 90 sec

Answer:  90 min

Question:  _________ represents the most active stage of the cell cycle

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

Answer: Interphase

Question: Interphase is called the resting phase because

• a) It does not involve any activity related to cell division
• b) It does not prepare cell for cell division
• c) It is the phase where cell rests before entering into mitosis
• d) It is the most active phase of the cell cycle

Answer: It does not involve any activity related to cell division

Question: _________ phase synthesizes enzymes required during S phase

• a) G₁
• b) S
• c) M
• d) G₂

Answer: G₁

Question:  Non-dividing cells enter the

• a) G₀ phase
• b) S phase
• c) M phase
• d) G₂ phase

Answer: G₀ phase

Question: The cells which enter _________ phase start differentiating into specific types of cell

• a) G₀
• b) S
• c) G₂
• d) G₁

Answer: G₀

Question: If the initial amount of DNA is 8 C, then after S phase the amount of DNA would be

• a) 16 C
• b) 64 C
• c) 8 C
• d) 4 C

Answer: 16 C

Question: The number of chromosomes in G₁ phase is 36, the number of chromosomes in S phase is

• a) 36
• b) 18
• c) 22
• d) 37

Answer: 36

Question:  A phase of the cell cycle which lasts more than 95% of the total duration is

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

Answer: Interphase

Question: Most dramatic period of cell cycle is

• a) M phase
• b) S phase
• c) G₂ phase
• d) G₁ phase

Answer: M phase

Question: Two daughter cells formed after mitosis are

• a) Identical to each other
• b) Irregular in size
• c) Non-identical to each other
• d) Non-identical to parents

Answer: Identical to each other

Question: A cell division in which a diploid somatic cell divides into two identical daughter cells is called

• a) Mitosis
• b) Cytokinesis
• c) Meiosis II
• d) Meiosis I

Answer: Mitosis

Question: Which type of cell division is called somatic cell division?

• a) Mitosis
• b) Reduction division
• c) Meiosis II
• d) Meiosis I

Answer: Mitosis

Question: Mitosis occurs in

• a) More than one option is correct
• b) Undifferentiated germ cells
• c) Meristematic cells
• d) Somatic cells

Answer: More than one option is correct

Question: The first phase of mitosis which follows interphase is

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

Answer:  Prophase

Question: Initiation of condensation of chromatin material occurs in

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

Answer: Prophase

More Questions.......................................

Question: Mitotic spindle initiates during

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

Answer: Prophase

Question: Nucleolus and nuclear membrane disappear during

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

Answer: Prophase

Question: The chromosomes are shortest and thickest during

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

Answer: Metaphase

Question: The chromosomes align at the equator during

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

Answer: Metaphase

Question: Read the following statements

(a) Complete disintegration of the nuclear envelope marks the start of the second phase of mitosis.
(b) Metaphase chromosome is made up of one sister chromatid.

• a) Only (a) is correct
• b) Only (b) is correct
• c) Both (a) & (b) are correct
• d) Both (a) & (b) are incorrect

Answer: Only (a) is correct

Question: The morphology of the chromosomes is studied during

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

Answer: Metaphase

Question: The point of attachment of microtubules on the chromosome is called as

• a) Kinetochore
• b) Chromatid
• c) Spindle
• d) Centromere

Answer: Kinetochore

Question: Chromosomes move towards the pole during

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

Answer: Anaphase

Question: The centromere splits during

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

Answer: Anaphase

Question: The chromosomes cluster at opposite poles and their identity is lost as discrete elements during

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

Answer: Telophase

Question: The mitotic spindle disappears in

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

Answer: Telophase

Question:  Decondensation of chromosomes occurs during

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

Answer: Telophase

Question: The nuclear envelope reassembles during

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

Answer: Telophase

Question: _________ phase marks the end of M-phase

• a) Cytokinesis
• b) Telophase
• c) Prophase
• d) Karyokinesis

Answer:  Cytokinesis

Question: If karyokinesis is not followed by cytokinesis, then gives rise to

• a) Multinucleate condition
• b) Embryo
• c) Fertilised egg
• d) Zygote

Answer: Multinucleate condition

Question: A single cell containing large number of nuclei is called

• a) Syncytium
• b) Cell plate
• c) Monad
• d) Bivalent

Answer: Syncytium

Question: A type of cell division which reduces chromosome number to half is

• a) Meiosis
• b) Fragmentation
• c) Multiple fission
• d) Mitosis

Answer: Meiosis

Question: In meiosis-I, condensation and coiling of chromatin fibres started during

• a) Leptotene
• b) Metaphase
• c) Diakinesis
• d) Diplotene

Answer: Leptotene

Question: In pachytene, each tetrad contains

• a) Four chromatids
• b) Three chromatids
• c) One chromatid
• d) Two chromatids

Answer: Four chromatids

Question: Crossing over occurs during

• a) Pachytene
• b) Diplotene
• c) Leptotene
• d) Anaphase I

Answer:  Pachytene

Question: The homologous chromosomes move towards the opposite poles during

• a) Anaphase I
• b) Anaphase II
• c) Leptotene
• d) Pachytene

Answer: Anaphase I

Question: _________ marks the site where crossing over had occurred

• a) Chiasmata
• b) Leptotene
• c) Synapsis
• d) Diakinesis

Answer: Chiasmata

Question: Terminalisation of chiasmata occurs during

• a) Prophase-I
• b) Metaphase-I
• c) Anaphase-I
• d) Telophase-I

Answer:  Prophase-I

Question: Bivalent chromosomes align themselves at the equator during

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

Answer: Metaphase I

Question: What will be the total number of mitotic divisions in the formation of 64 daughter cells?

• a) 63
• b) 16
• c) 32
• d) 6

Answer: 63

Question: If there are 30 chromosomes in G₁ phase then what will be number of bivalents in zygotene stage?

• a) 15
• b) 45
• c) 60
• d) 30

Answer: 15

Question: What will be the amount of DNA in meiosis II products if meiocyte contains 30 Pg DNA in G₁ phase?

• a) 15 Pg
• b) 120 Pg
• c) 60 Pg
• d) 30 Pg

Answer: 15 Pg

Question: Agglutination of chromosomes is caused by a mitotic poison called

• a) Mustard gas
• b) Ribonuclease
• c) Azide
• d) Chalones

Answer: Mustard gas

Question: Select an incorrect statement w.r.t. cell cycle

• a) Duplication of genes occurs twice in meiosis
• b) Karyokinesis occurs twice during meiotic division
• c) Cyclins are proteins that activate protein kinases to regulate the cell cycle
• d) After telophase-I, chromosome number is reduced to half

Answer: Duplication of genes occurs twice in meiosis

Question: Cyclin Dependent Kinases (CDKs)

• a) Control various phases of cell cycle
• b) Cause disassembly of the microtubules
• c) Act as mitotic poisons
• d) Arrest cell division due to non-formation of spindle

Answer:  Control various phases of cell cycle

Question: Which phase of interphase is the most important point in regulation of the cell cycle, during which it must decide whether the cell will start a new cycle or will enter in G₀ phase?

• a) G₁ phase
• b) S phase
• c) G₂ phase
• d) Quiescent stage

Answer:  G₁ phase

Question: Identify the mismatched pair

• a) B – Stage where cells are inactive metabolically
• b) A – Starts with karyokinesis and ends with cytokinesis
• c) C – Cell grows and carries out normal metabolism
• d) D – Period of cytoplasmic growth

Answer: B – Stage where cells are inactive metabolically

Question: The two daughter cells formed during mitosis contains

• a) The same amount of DNA and the same set of chromosomes as those of the parent cell
• b) The same amount of DNA but a set of chromosomes different from those of parental cells
• c) Double the amount of DNA and a set of chromosomes different from those of the parent cell
• d) Half the amount of DNA and the same set of chromosomes as those of the parent cell

Answer: The same amount of DNA and the same set of chromosomes as those of the parent cell

Question: Higher plants differ from animals in having

• a) Anastral mitosis
• b) Disappearance of nucleolus during prophase
• c) Spindle microtubule
• d) Kinetochores

Answer: Anastral mitosis

Question:  Which of the following phases are longest and shortest in mitosis?

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

Answer:  Prophase, Anaphase

Question: The period between two successive divisions is called

• a) Cellcycle
• b) Cell division
• c) Cell division
• d) None of these

Answer: Cellcycle

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

• a) 24 Hrs
• b) 30 Hrs
• c) 20 Hrs.
• d) 17 Hrs.

Answer: 24 Hrs

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

• a) Heterotypic division
• b) Cellcycle
• c) Cytokineis
• d) Mitosis

Answer: Heterotypic division

Question: During cell cycle DNA replication takes place in

• a) S - phase
• b) M - phase
• c) G₂ - phase

Answer: S - phase

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

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

Answer: Prophase

Question: At Which sub stage of meiosis crossing over takes place ?

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

Answer: Pachytene

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

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

Answer: Telophase

Question: What is average cell cycle span of a Yeast cell ?

• a) 90 min.
• b) 120 min.
• c) 85 min
• d) 70 min

Answer: 90 min.

Question: Interphase can be divided into how many sub phases ?

• a) 3
• b) 2
• c) 8
• d) 5

Answer: 3

Question: In how many phase the mitosis can be divided ?

• a) 4
• b) 8
• c) 3
• d) 5

Answer: 4

Question: The result of meiosis is the formation of

• a) 8 cells
• b) 6 cells
• c) 2 cells
• d) 4 cells

Answer: 8 cells

Question: The locations at which crossing over occurs are known as

• a) Chiasmata
• b) Centriole
• c) Kinetochore
• d) Centromere

Answer: Chiasmata

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

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

Answer: Prophase

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

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

Answer: Centriole

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

• a) 7
• b) 34
• c) 25
• d) 54

Answer: 7

Question: Series of cell division is

• a) prophase, metaphase, anaphase, telophase
• b) prophase, anaphase, metaphase, telophase
• c) prophase, metaphase, telophase, anaphase
• d) anaphase, metaphase, telophase, prophase

Answer: prophase, metaphase, anaphase, telophase

Question: Meiosis involves

• a) two nuclear division and one chromosome division
• b) two each nuclear and chromosome division
• c) one each nuclear and chromosome division
• d) one nuclear and two chromosomes division

Answer: two nuclear division and one chromosome division

Question: The sequence of cell cycle is

• a) G₁, S, G₂ and M
• b) M, G₁, G₂ and S
• c) S, M, G₁ and G₂
• d) None of these

Answer:  G₁, S, G₂ and M

Question: Which of the correct order of phases in prophsae I ?

• a) Leptotene, zygotene, pachytene, diplotene, diakinesis
• b) Leptotene, diakinesis, pachytene, diplotene, zygotene
• c) Diakinesis, diplotene, pachytene, zygotene, leptotene
• d) Laptotene, pachytene, zygotene, diplotene, dikinesis

Answer: Leptotene, zygotene, pachytene, diplotene, diakinesis

Question: In how many cells the meiotic division has taken place, if the total number of gametes produced are 32 ?

• a) 8
• b) 32
• c) 16
• d) 4

Answer: 8

Question: Stomatal aperature is surrounded by guard cells and opens when guard cells are

• a) Turgid
• b) Flaccid
• c) Bean shaped
• d) Dumb-bell shaped

Answer: Turgid