Biology

Cell Cycle and Chromosomes

1,219 Questions

Explore a curated list of questions covering the cell cycle, mitosis, and meiosis. Topics include DNA replication, chromosomal structures, and genetic disorders. This material is essential for students preparing for biology and general science competitive exams.

Cell cycle eventsDNA replicationMeiosis processChromosomal structuresGenetic disorders

Cell Cycle and Chromosomes Questions

Multiple choice

Which of the following is the correct sequence of the cell cycle?

  1. S, M, G1, G2

  2. G1, G2, S, M

  3. M, G1, G2, S

  4. G1, S, G2, M

  5. -
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct sequence of the cell cycle. The G1 stage stands for GAP 1. The S stage stands for synthesis. This is the stage when DNA replication occurs. The G2 stage stands for GAP 2. The M stage stands for mitosis.

Multiple choice

Amitosis is

  1. division involving spindle formation

  2. division involving formation of chromosome bridges

  3. division in which chromosomes are unequally distributed

  4. cleavage of nucleus without recognisable chromosome distribution

  5. -
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cell division by simple cleavage of the nucleus and division of the cytoplasm without spindle formation is called amitosis.

Multiple choice

Polyploidy means occurrence of

  1. haploid set of chromosomes

  2. diploid set of chromosomes

  3. more than one diploid set of chromosomes

  4. All of the above

  5. -
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Polyploidy is the heritable condition of possessing more than two complete sets of chromosomes. Polyploids are common among plants.

Multiple choice

During mitosis, the number of chromosomes is

  1. halved

  2. unchanged

  3. doubled

  4. tripled
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mitosis is an equational division. The number of chromosomes remains the same in the two daughter cells as it was in the mother cell.

Multiple choice

What precedes reformation of nuclear envelope in M phase?

  1. Decondensation of chromosomes and appearance of nuclear lamina

  2. Transcription of chromosomes and reassembly of nuclear lamina

  3. Formation of phragmoplast and contraction ring

  4. Formation of contraction ring and transcription from chromosomes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

   

Multiple choice

Mitotic anaphase differs from metaphase in possessing

  1. same number of chromosomes and same number of chromatids

  2. half the number of chromosomes and half the number of chromatids

  3. half the number of chromosomes and same number of chromatids

  4. same number of chromosomes and half the number of chromatids
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In anaphase, there are same number of chromosomes and half the number of chromatids.

Multiple choice

Mitogens are the agents that induce

  1. amitosis

  2. mitosis

  3. meiosis

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A mitogen is a chemical substance that encourages a cell to commence cell division, triggering mitosis. A mitogen is usually some form of a protein. Mitogenesis is the induction (triggering) of mitosis, typically via a mitogen. 

Multiple choice

During the meiotic division, the

  1. homologous chromosomes are separated

  2. linkage is disturbed

  3. homologous chromosomes do not segregate

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

During the meiotic division, the homologous chromosomes are separated.