Q76
Allen
3. PYQ
MCQ
Match the following with respect to meiosis:
| Column-I | Column-II | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
A.
a-ii, b-iv, c-iii, d-i
B.
a-iii, b-iv, c-i, d-ii
C.
a-iv, b-iii, c-ii, d-i
D.
a-i, b-ii, c-iv, d-iii
Q77
Allen
3. PYQ
MCQ
Identify the correct statement with regard to Gā phase (Gap 1) of interphase.
A.
Nuclear Division takes place.
B.
DNA synthesis or replication takes place.
C.
Reorganisation of all cell components takes place.
D.
Cell is metabolically active, grows but does not replicate its DNA.
Q78
Allen
3. PYQ
MCQ
Some dividing cells exit the cell cycle and enter vegetative inactive stage. This is called quiescent stage (G0). This process occurs at the end of:
A.
Gā phase
B.
M phase
C.
Gā phase
D.
S phase
Q79
Allen
3. PYQ
MCQ
Dissolution of the synaptonemal complex occurs during :
A.
Leptotene
B.
Pachytene
C.
Zygotene
D.
Diplotene
Q80
Allen
3. PYQ
MCQ
Attachment of spindle fibres to kinetochores of chromosomes becomes evident in :
A.
Anaphase
B.
Telophase
C.
Prophase
D.
Metaphase
Q81
Allen
3. PYQ
MCQ
In a mitotic cycle, the correct sequence of phases is
A.
S, Gā, Gā, M
B.
Gā, S, Gā, M
C.
M, Gā, Gā, S
D.
Gā, Gā, S, M
Q82
Allen
3. PYQ
MCQ
During Meiosis-I, in which stage synapsis takes place?
A.
Pachytene
B.
Zygotene
C.
Diplotene
D.
Leptotene
Q83
Allen
3. PYQ
MCQ
Match the following events that occur in their respective phases of cell cycle and select the correct option :
| Column-I | Column-II | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
A.
(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
B.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
C.
(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
D.
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
Q84
Allen
3. PYQ
MCQ
Which of the following stages of meiosis involves division of centromere?
A.
Metaphase I
B.
Metaphase II
C.
Anaphase II
D.
Telophase II
Q85
Allen
3. PYQ
Match the Columns
Match Column-I with Column - II.
| Column-I | Column-II | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|
Correct Answer: C
Explanation:
C
Q86
Allen
3. PYQ
MCQ
The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at Gā phase is 8, what would be the number of chromosomes after S-phase?
A.
8
B.
16
C.
4
D.
32
Q87
Allen
3. PYQ
MCQ
The centriole undergoes duplication during:
A.
S-phase
B.
Prophase
C.
Metaphase
D.
Gā phase
Q88
Allen
3. PYQ
MCQ
Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature?
A.
Leptotene
B.
Zygotene
C.
Diakinesis
D.
Pachytene
Q89
Allen
3. PYQ
MCQ
The appearance of recombination nodules on homologous chromosomes during meiosis characterizes:
A.
Bivalent
B.
Sites at which crossing over occurs
C.
Terminalization
D.
Synaptonemal complex
Q90
Allen
3. PYQ
MCQ
Which one of the following never occurs during mitotic cell division?
A.
Movement of centrioles towards opposite poles
B.
Pairing of homologous chromosomes
C.
Coiling and condensation of the chromatids
D.
Spindle fibres attach to kinetochores of chromosomes
Q91
Allen
3. PYQ
MCQ
Select the incorrect statement with reference to mitosis:
A.
Spindle fibres attach to centromere of chromosomes.
B.
Chromosomes decondense at telophase.
C.
Splitting of centromere occurs at anaphase.
D.
All the chromosomes lie at the equator at metaphase.
Q92
Allen
3. PYQ
MCQ
Regarding Meiosis, which of the statements is incorrect?
A.
DNA replication occurs in S phase of Meiosis-II
B.
Pairing of homologous chromosomes and recombination occurs in Meiosis-I
C.
Four haploid cells are formed at the end of Meiosis-II
D.
There are two stages in Meiosis, Meiosis-I and II
Q93
Allen
3. PYQ
MCQ
Which stage of meiosis can last for months or years in the oocytes of some verterbrates?
A.
Leptotene
B.
Pachytene
C.
Diplotene
D.
Diakinesis
Q94
Allen
3. PYQ
MCQ
In meiosis, crossing over and exchange of genetic material between homologous chromosomes are catalyzed by the enzyme.
A.
Phosphorylase
B.
Recombinase
C.
Transferase
D.
Polymerase
Q95
Allen
3. PYQ
MCQ
Identify the correct sequence of events during Prophase I of meiosis :
(a) Synopsis of homologous chromosomes
(b) Chromosomes become gradually visible under microscope
(c) Crossing over between non-sister chromatids of homologous chromosomes
(d) Terminalisation of chiasmata
(e) Dissolution of synaptonemal complex
Choose the correct answer from the options given below :
(a) Synopsis of homologous chromosomes
(b) Chromosomes become gradually visible under microscope
(c) Crossing over between non-sister chromatids of homologous chromosomes
(d) Terminalisation of chiasmata
(e) Dissolution of synaptonemal complex
Choose the correct answer from the options given below :
A.
(a), (b), (c), (d), (e)
B.
(b), (c), (d), (e), (a)
C.
(b), (a), (c), (e), (d)
D.
(a), (c), (d), (e), (b)
Q96
Allen
3. PYQ
MCQ
Bivalent or Tetrad formation is a characteristic feature observed during :
A.
Synaptonemal complex in zygotene stage
B.
Chiasmata in Diplotene stage
C.
Synaptonemal complex in Pachytene stage
D.
Chiasmata in zygotene stage
Q97
Allen
3. PYQ
MCQ
With respect to metaphase, which of the following statements is incorrect?
A.
Complete disintegration of nuclear envelope takes place
B.
Chromosomes are highly condensed
C.
Metaphase chromosomes are made up of four sister chromatids held together by centromere
D.
Chromosomes lie at the equator of the cell
Q98
Allen
3. PYQ
MCQ
The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?
A.
Pachytene
B.
Diplotene
C.
Diakinesis
D.
Zygotene
Q99
Allen
3. PYQ
MCQ
Which of the following stages of meiosis involves division of centromere?
A.
Metaphase II
B.
Anaphase II
C.
Telophase
D.
Metaphase I
Q100
Allen
3. PYQ
MCQ
Among eukaryotes, replication of DNA takes place in -
A.
S phase
B.
$G_{1}$ phase
C.
$G_{2}$ phase
D.
M phase