Practice Start Test

Cell Cycle and Cell Division

NEET Biology · 60 questions · Page 5 of 6 · Click an option or "Show Solution" to reveal answer

Q41
Which stages do figures A (late anaphase) and B (prophase) represent?
A Metaphase - Telophase \
B Telophase - Metaphase \
C Late Anaphase - Prophase \
D Prophase - Anaphase array
Correct Answer
Option C
Solution

(c) Figure A represents late anaphase while figure B represents prophase stage of mitosis.

Q42
A stage in cell division is shown in the figure showing nuclear envelope reforms and golgi complex reforms
A & Late anaphase & Chromosomes move away from equatorial plate, Golgi complex not present \
B & Cytokinesis & Cell plate formed, mitochondria distributed between two daughter cells \
C & Telophase & Endoplasmic reticulum and nucleolus not reformed yet \
D & Telophase & Nuclear envelop reforms, golgi complex reforms \ array
Correct Answer
Option D
Solution

(d) Telophase is the stage of reconstitution of nuclei.

Nuclear envelope assembles around chromatin mass.

Nucleolus, Golgi complex and ER reform.

Q43
Match the following with respect to meiosis: Zygotene, Pachytene, Diplotene, Diakinesis
A & (iv) & (iii) & (ii) & (i) \
B & (i) & (ii) & (iv) & (iii) \
C & (ii) & (iv) & (iii) & (i) \
D & (iii) & (iv) & (i) & (ii) array
Correct Answer
Option A
Solution

(a) Zygotene - Synapsis; Pachytene - Crossing over; Diplotene - Chiasmata formation; Diakinesis - Terminalisation.

Q44
The enzyme recombinase is required at which stage of meiosis:
A Pachytene
B Zygotene
C Diplotene
D Diakinesis
Correct Answer
Option A
Solution

(a) The enzyme recombinase is required at Pachytene stage of meiosis for crossing over.

Q45
Segregation of mendelian factor (Aa) occurs during
A Diplotene
B Anaphase I
C Zygotene/Pachytene
D Anaphase II
Correct Answer
Option B
Solution

(b) The paired homologous chromosomes separate in Anaphase I of meiosis I.

Q46
Which one of the following precedes reformation of the nuclear envelope during M phase of the cell cycle
A Decondensation from chromosomes, and reassembly of the nuclear lamina
B Transcription from chromosomes, and reassembly of the nuclear lamina
C Formation of the contractile ring, and formation of the phragmoplast
D Formation of the contractile ring, and transcription from chromosomes
Correct Answer
Option A
Solution

(a) At telophase, decondensation of chromosomes occurs before nuclear membrane reforms.

Q47
In cell cycle, DNA replication takes place in
A G1 phase
B G2 phase
C Mitotic metaphase
D S phase
Correct Answer
Option D
Solution

(d) S phase (synthetic phase) is when DNA molecules replicate.

Q48
During mitosis ER and nucleolus begin to disappear at:
A late prophase
B early metaphase
C late metaphase
D early prophase
Correct Answer
Option D
Solution

(d) During mitosis, endoplasmic reticulum and nucleus begin to disappear at early prophase.

Q49
Mitotic anaphase differs from metaphase in having
A same number of chromosomes and same number of chromatids
B half number of chromosomes and half number of chromatids
C half number of chromosomes and half number of chromatids
D same number of chromosomes and half number of chromatids
Correct Answer
Option D
Solution

(d) In mitotic anaphase, sister chromatids separate. Same number of chromosomes but half the chromatids per chromosome.

Q50
The stage during which separation of the paired homologous chromosomes begins is
A Pachytene
B Diplotene
C Zygotene
D Diakinesis
Correct Answer
Option B
Solution

(b) Diplotene is the stage during which paired homologous chromosomes begin to separate and chiasmata become visible.

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