NEET UG Botany-125

Question No:1

Identify the correct ascending sequence of the following aspects of meiosis.
A) Number of spindle apparati formed
B) Number of chromosomal divisions
C) Number of cells formed

D) Number of nuclear generations

(A) B, C,A, D
(B) B, D, C, A
(C) D, C, A, B
(D) B, D, A, C

Question No:2

Study the following lists:
List-I— List-II
A) Prophase I) Formation of spindle fibres
B) Metaphase II) Nucleolus disappears
C) Anaphase III)DNA replication
D) Telophase IV) Centromeres divide
V) Nucleolus reorganized
The correct match is

ABCD

(A) II IV III V
(B) II IV I V
(C) II I IV V
(D) IV IE II I

Question No:3

Study the following lists:
List-I— List-II
A) Diplotene I) Increase in the size of nucleolus
B) Zygotene II) Homologous chromosomes are long and thread like
C) Pachytene III) Condensation, contraction and thickening chromosomes
D) Leptotene IV) Occurrence of crossing over
V) Chromosomes released into cytoplasm
The correct match is

ABCD

(A) III I IV II
(B) III I IV V
(C) V IV I II
(D) II IV V III

Question No:4

Match the following lists :
List-I– List-II
A)Doubling the number I) G1 – Phase of chromosomes
B) Doubling the II) S – Phase cell organelles
C) Doubling the DNA III) G2 – Phase
D)Doubling the IV) Anaphase number of cells
V) Cytokinesis
The correct match is

ABCD

(A) II I IV III
(B) II III IV V
(C) IV III II V
(D) IV I II III

Question No:5

Match the following lists:
List-I– List-II
A) Leptotene I) Terminalisation
B) Zygotene II) Condensation
C) Pachytene III) Crossing over
D) Diplotene IV) Synapsis
E) Diakinesis V) Long and thin chromosomes
The correct match is
A B C D E

(A) V IV III II I
(B) III V IV I II
(C) I IV V III II
(D) IV II I III V

Question No:6

Study the following table:
List-I –List-II
A) Complete disappearance I) Zygotene of chiasmata
B) Repulsion of homologous II) Anaphase-I chromosomes
C) Maximum attractive III) Pachytene forces between -homologous chromosomes
D) Displacement of chiasmata IV) Diplotene
V) Diakinesis
The correct match is

ABCD

(A) V III I IV
(B) V II III IV
(C) II IV I V
(D) II I V III

Question No:7

List-I List-II
A) Anaphase-I I) Repulsion between homologus chromo somes
B) Pachytene II) Attraction between homologous chromosomes
C) Zygotene III)Exchange between homologous chromosomes
D)Diplotene IV)Separation of homologous chromosomes
The correct match is

ABCD

(A) I II III IV
(B) III IV II I
(C) IV III I II
(D) IV III II I

Question No:8

Arrange the various phenomena of meiosis in a correct sequence
A) Pairing of homologous chromosomes
B) Separation of genomes
C) Recombination between two chromosomes

D) Chaismata

(A) D, B, A, C
(B) D, C, A, B
(C) A, C, D, B
(D) C, D, B, A

Question No:9

Match the following lists :
List-I List-II
A)Anaphase-I I) One spindle apparatus
B) Anaphase-II II) Separation of two genomes
C) Metaphase-II III) Two spindle apparatii
D) Telophase-II IV) Separation of two chromatids
V) Four daughter nuclei
The correct match is
ABCD

(A) V IV III II
(B) II IV III V
(C) I IV V III
(D) IV II I III

Question No:10

A stage in mitosis that starts towards the middle of anaphase and is completed with the telophase

(A) cytokines is
(B) karyokine is
(C) Crossing over
(D) inter kinesis

Question No:11

Small disc – shaped structures at the surface of the centromere that disappear during meta-phase are

(A) Kinetochore
(B) Metaphase plate
(C) Spindle fibres
(D) Chromatids

Question No:12

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

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

Question No:13

The replication of DNA is a pre – requisite for a eukaryotic cell to undergo division. During the cell cycle the DNA replicates in

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

Question No:14

If we ignore the effect of crossing over, how many different haploid cells arise by meiosis in a diploid cell having 2n = 12 ?

(A) 8
(B) 16
(C) 32
(D) 64

Question No:15

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 the above

Question No:16

Reduction in pteridophyta occurs

(A) During gamete formation
(B) After spore formation
(C) During spore formation
(D) After gamete formation

Question No:17

Which of the following stage during meiosis is concerned with DNA replication?

(A) Inter phase
(B) Prophase
(C) Metaphase
(D) Anaphase

Question No:18

Crossing over helps in:

(A) Pure line selection
(B) Inducing mutation
(C) Inducing polyploidy
(D) Recombination between the genes

Question No:19

Zygotic meiosis is found in :

(A) Fern
(B) Fucus
(C) Funaria
(D) Chlamydomonas

Question No:20

Microtubule depolymerizing drug such as colchicine is expected to

(A) inhibit spindle formation during mitosis
(B) inhibit cytokinesis
(C) allow mitosis beyond metaphase
(D) induce formation of multiple contractile rings