NEET Biology Cell Cycle and Cell Division MCQs Set C

Question: In the plant cell, cytokinesis occurs by

• a) Separation of the cytoplasm from cell centre to its periphery
• b) Separation of the cytoplasm throughout the equatorial plane simultaneously
• c) Following of cytoplasm from two side at right angles to the plane of spindle pole
• d) Separation of the cytoplasm from the periphery to central region

Answer: Separation of the cytoplasm from cell centre to its periphery

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

• a) A cell with two or more nuclei
• b) Ensuring genetic homogeneity of cell
• c) A cell with a single large nucleus
• d) Cells with abnormal small nuclei

Answer: A cell with two or more nuclei

Question: How many time is the genetic material replicated during meiosis ?

• a) Once
• b) Twice
• c) Four times
• d) None of these

Answer: Once

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

• a) Bivalent
• b) Tetravalent
• c) Trivalent
• d) Univalent

Answer: Bivalent

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

• a) Prophase-II
• b) Leptotene
• c) Diplotene
• d) Metaphase-III

Answer: Prophase-II

Question: During prophase – I of meiosis homologous chromosomes pair with each other to form bivalent. A bivalent is an association of

• a) Four chromatids and two centromeres
• b) Two chromatids and one centromere
• c) Four chromatids and four centromeres
• d) Two chromatids and two centromeres

Answer: Four chromatids and two centromeres

Question: Crossing over involves

• a) Exchange of genetic matetial
• b) Duplication of chromosomes
• c) Deletion of chromosomes
• d) Addition of chromosome

Answer: Exchange of genetic matetial

Question: Crossing over occurs between

• a) Non – sister chromatids of homologous chromosomes
• b) Non – homologous chromatids of non homologous chromosomes
• c) Sister chromatids of homologous chromosomes
• d) Sister chromatids of non homologous chromosome

Answer: Non – sister chromatids of homologous chromosomes

Question: During meiosis centromere divides :

• a) Only one at anaphase - II
• b) Twice in meiosis – I & II
• c) Only once at anaphase – I
• d) Twice in each cell at the end of anaphase – I & II

Answer: Only one at anaphase - II

Question: Which of the following occurs only during meiosis ?

• a) Pairing of homologous chromosomes
• b) Cytokinesis
• c) Separation of duplicated stands
• d) Disappearance of nucleolus

Answer: Pairing of homologous chromosomes

Question: Which of the following occurs only during meiosis ?

• a) Pairing of homologous chromosomes
• b) Cytokinesis
• c) Separation of duplicated stands
• d) Disappearance of nucleolus

Answer: Pairing of homologous chromosomes

Question: 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 chromosones

(D) Diakinesis (s) Crossing over

• a) (A - r) (B - r) (C - s) (D - p)
• b) (A - s) (B - s) (C - p) (D - q)
• c) (A - r) (B - r) (C - s) (D - q)
• d) (A - q) (B - q) (C - s) (D - r)

Answer: (A - r) (B - r) (C - s) (D - p)

Question: 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 - q) (B - r) (C - p)
• b) (A - r) (B - q) (C - p)
• c) (A - p) (B - r) (C - q)
• d) (A - r) (B - p) (C - q)

Answer: (A - q) (B - r) (C - p)

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

• a) Significance of meiosis
• b) Cell Cycle
• c) S - phase
• d) None of these

Answer: Significance of meiosis

Question: Which of the following statement is true for prophase

• a) In this phase condensation of chromosome takes place along their lengths
• b) At the end of this phase chromosomes disappear
• c) At the end of this phase nuclear membrane is formed
• d) At the end of this phase chromosomes disappear

Answer: In this phase condensation of chromosome takes place along their lengths

Question: Syncytium means

• a) a condition arises when karyokinesis is not followed by cytokinesis
• b) small disc shaped structures at the surface of the centromeres
• 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: a condition arises when karyokinesis is not followed by cytokinesis

Question: In animal cell

• a) constriction of cytoplasm begins from the centre of the cell
• b) middle lamella made up of pectin develops
• c) constriction of cytoplasm begins from the peripheral region of the cell.
• d) None of these

Answer: constriction of cytoplasm begins from the centre of the cell

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

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

Answer: D Synthetic phase

Question: Spindle fibre shorten

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

Answer: Anaphase

Question: Nucleus is reformed

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

Answer: Telophase-I

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

• a) Metaphae-I
• b) Metaphase
• c) Zygotene
• d) Metaphase-II

Answer: Metaphae-I

Question: Prophase is characterized by

• a) thread like appearance of chromosomes
• b) spliting of centromere
• c) arrangement of chromosomes on metaphic plate
• d) pairing of homologous chromosome

Answer: thread like appearance of chromosomes

Question: Given :

(1) Chromatid (2) Monad

(3)Dyad (4) Daughter Chromosomes

• a) 2, 3, 1, 4
• b) 1, 2, 3, 4
• c) 3, 2, 1, 4
• d) 4, 3, 2, 1

Answer: 2, 3, 1, 4

Question: Phase of cell cycle unique for DNA replication is

• a) S
• b) G₁
• c) G₂
• d) M

Answer: S

Question: Pairing of homologous chromosomes during zygotene is termed

• a) synapsis
• b) synapse
• c) synapsida
• d) crossing over

Answer: synapsis

Question: At which stage of mitosis chromatids separate and passes to different poles

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

Answer: Anaphase

Question: G₂ phase is between

• a) end of S phase and start of mitosis
• b) end of mitosis and start of S phase
• c) start of S phase and start of mitosis
• d) end of S phase and end of mitosis

Answer: end of S phase and start of mitosis

Question: Post mitotic gap phase and synthesis phase of cell cycle are also respectively referred to as

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

Answer:  G₁ and S

Question: The two chromatids of a metaphase chromosome represents

• a) replicated chromosomes to be separated at anaphase
• b) homologous chromosome of a diploid set
• c) non-homologous joined at the centromere
• d) maternal and paternal chromosomes joined at the centromere

Answer: replicated chromosomes to be separated at anaphase

Question: If you are provided with root-tips of onion in your class and are asked to count the chromosome, which of the following stage can you most conviently look into

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

Answer: Metaphase

Question: What is correct ?

• a) DNA – replication occurs in S – phase
• b) Duration of interphase is short as compared to M – phase
• c) DNA – content become double during G1 phase
• d) None of these

Answer: DNA – replication occurs in S – phase

Question: A cell divides every one minute. At this rate of division it can fill a 100 ml of beaker in one hour. How much time does it take to fill a 50 ml beaker ?

• a) 59 minute
• b) 32 minute
• c) 60 minute
• d) 30 minute

Answer: 59 minute

Question: At which phase of meiosis, the 2 cell, each with separated sister chromatids move towards opposite poles

• a) anaphase-II
• b) anaphase-I
• c) metaphase-I
• d) metaphase-II

Answer: anaphase-II

Question: During meiosis crossing over occurs between which part of homologous chromosome ?

• a) nonsister chromatids
• b) alleles
• c) genes
• d) sister chromatids

Answer: nonsister chromatids

Question: During mitotic metaphase

• a) chromosomes are located at equator
• b) chromosomes become thread like and condensed
• c) chromosomes are divided
• d) crossing over occurs

Answer: chromosomes are located at equator

Question: In meiosis the daughter cells are not similar to that of parent because of

• a) crossing over
• b) Synapsis
• c) both (a) and (b)
• d) none of these

Answer: crossing over

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

• a) pachytene
• b) zygotene
• c) diplotene
• d) diakinesis

Answer: pachytene

Question: Pick out the correct statements :

(A) Synapsis of homologous chromosomes takes place during prophase-I of meiosis.

(B) Division of centromeres takes place during anaphase I of meiosis.

(C) Spindle fibres disappear completely in telophase of mitosis.

(D) Nucleoli reappear at telophase I of meiosis

• a) A, C, and D only
• b) A and B only
• c) A only
• d) C only

Answer: A, C, and D only

Question:

Assertion (A) : Phase of cell division is also known as dividing phase.

Reason (R) : In mitotic phase new cells are produced from pre-existing cells through meiosis division.

• a) A is true statement but R is false
• b) Both A and R are false
• c) Both A and R are true but the R is not the correct explanation of A
• d) Both A and R are true and R is the correct explanation of A

Answer: A is true statement but R is false

Question: Synapsis occurs between

• a) two homologous chromosomes
• b) m-RNA and ribosomes
• c) spindle fibres and centromere
• d) a male and a female gamete

Answer: two homologous chromosomes

Question: During mitosis nuclear membrane and nucleolus begin to disappear at

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

Answer: Late prophase

Question: Cell cycle is divided in stages as given below Which is the correct pair ?

• a) B – metaphase
• b) D – synthesis phase
• c) C – kietochore
• d) A – cytokinesis

Answer: B – metaphase

Question: IN which stage of mitosis division segregation of chromatids occur and they migrate at different polar ends

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

Answer: Metaphase

Question: Number of chromosomes are maintained from generation to generation by

• a) Meiosis division
• b) Division
• c) Metamorphosis
• d) Mitotic division

Answer: Meiosis division

Question: How many meiotic stage are essential for producing 28 cells from one cell ?

• a) 7
• b) 14
• c) 28
• d) 64

Answer: 7

Question: In diploid living organisms crossing over is responsible for ?

• a) Recombination of linked genes
• b) Linkage between genes
• c) Dominancy of genes
• d) No Segregation of genes

Answer: Recombination of linked genes

Question: What would be the number of chromosomes of the aleurone cells of a plant with 42chromosomes in its root tip cells

• a) 63
• b) 42
• c) 21
• d) 84

Answer: 63

Question: Select the correct option with respect to mitosis

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

Answer: Chromosomes move to the spindle equator and get aligned along equatorial plate inmetaphase

Question: During gamete formation, the enzyme recombinase participate during

• a) Prophase-I
• b) Anaphase-II
• c) Prophase-II
• d) Mataphase-I

Answer: Prophase-I

Question: The time period between meiotic I and meiotic II cell division is called

• a) interkinesis
• b) interphase
• c) growth phase
• d) None of these

Answer: interkinesis

Question: Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage ?

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

Answer: Prophase-I during meiosis

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