NEET UG Botany MCQ-120


Question No:1

In animal cells, cytokinesis is achieved by

(A) Cell furrow method
(B) Cell plate method
(C) Both
(D) None

Question No:2

In some lower plants and in some social insects, mitosis occurs in

(A) Diploid cells
(B) Haploid cells
(C) Both haploid and diploid cells
(D) None

Question No:3

Significance of mitosis is

(A) Growth of multicellular organisms
(B) Maintains nucleo-cytoplasmic ratio
(C) Cell repair
(D) All

Question No:4

The following types of cells are constantly replaced by new cells formed as a result of mitosis

(A) Upper layer of the eqidermis
(B) Cells of the lining of the gut
(C) Blood cells
(D) All

Question No:5

Restoration of haploid phase in the life cycle of sexually reproducing organisms, takes place by

(A) Amitosis
(B) Mitosis
(C) Binary fission
(D) Meiosis

Question No:6

Meiosis occurs during

(A) Sporogenesis
(B) Gametogenesis
(C) Embryogenesis
(D) (a) and (b)

Question No:7

Parental chromosomes produce two identical sister chromatids during

(A) G1 phase
(B) G2 phase
(C) S-phase
(D) Prophase

Question No:8

The following stage is incorrect with reference to meiosis

(A) Nucleus divides twice
(B) Chromosomes divide twice
(C) Chromosomes divide once
(D) Centromere divides once

Question No:9

DNA replication occurs

(A) During meiosis
(B) Before meiosis
(C) After meiosis
(D) During mitosis

Question No:10

Prophase-I is divided into five phases based on

(A) Chromosome number
(B) Time duration
(C) Chromosome behaviour
(D) Crossing over patterns

Question No:11

Longest phase of meiosis is

(A) Prophase -I
(B) Prophase-II
(C) Anaphase-I
(D) Metaphase-I

Question No:12

Chromosomes are first visible under light micro-scope during

(A) Leptotene
(B) Zygotene
(C) Pachytene
(D) Diplotene

Question No:13

Bivalents first appear during

(A) Leptotene
(B) Zygotene
(C) Pachytene
(D) Diplotene

Question No:14

‘Synapsis’ involves pairing of

(A) Homologous chromosomes of same parent
(B) Homologous chromosomes of different parents
(C) Non-Homologous chromosomes of same parent
(D) Non-Homologous chromosomes of different parents

Question No:15

Bivalents or tetrads first seen clearly during

(A) Leptotene
(B) Zygotene
(C) Pachytene
(D) Diplotene

Question No:16

Bivalent chromosomes clearly appear as tetrads during

(A) Zygotene
(B) Diplotene
(C) Pachytene
(D) Diakinesis

Question No:17

Relatively longer and complex stage of prophase -I

(A) Leptotene
(B) Diplotene
(C) Zygotene
(D) Pachytene

Question No:18

Recombinase enzyme is active during

(A) Prophase-I
(B) Prophase-II
(C) Metaphase-I
(D) Metaphase-II

Question No:19

Number of recombination nodules is relatively more in

(A) Leptotene
(B) Zygotene
(C) Pachytene
(D) Diakinesis

Question No:20

Most important stage for the evolution of new species is

(A) Leptotene
(B) Zygotene
(C) Pachytene
(D) Diplotene