Biology

Cell Cycle and Chromosomes

1,348 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

Chromosomes are

  1. constituent of blood which produces heat in the body.

  2. thread-like bodies that occur in the nuclei which carry the genetic code.

  3. parts of the human brain.

  4. none of the above.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A chromosome is an organized structure of DNA and protein found in cells. It is a single piece of coiled DNA containing many genes, regulatory elements and other nucleotide sequences. Chromosomes also contain DNA-bound proteins, which serve to package the DNA and control its functions. They are thread-like bodies that occur in the nuclei which carry the genetic code.

Multiple choice

Balbiani rings are the structural features of

  1. Allosomes

  2. Polytene chromosomes

  3. Lampbrush chromosomes

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

Balbiani rings are large RNA puffs reported in the salivary gland chromosomes of chironomus during larval development.

Multiple choice

Which one of the following correctly explains the term 'chimaera'?

  1. Breaking a part of chromosome segment during mutation

  2. During mutation at segregation, chromosomes become equally distributed

  3. Development of genetically diverse tissues in the same organism

  4. Spontaneously induced deletions

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chimaera is composed of genetically diverse tissues in most cases in a plant more rarely in an animal.

Multiple choice

Datura is an example of

  1. Monosomy

  2. Eupolidy

  3. Trisomy

  4. Inversion
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

It is a genetic abnormality in which there are three copies instead of two of a particular chromosome.

Multiple choice

Cytokinesis is the process of splitting the daughter cells apart.The protein participating in cell division and cytokinesis is

  1. Nectins

  2. Desmogleins

  3. T-cadherin

  4. Actin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Actin participates in many important cellular processes including muscle contraction, cell motility, cell division and cytokinesis, vesicle and organelle movement, cell signaling, and the establishment and maintenance of cell junctions and cell shape.

Multiple choice

The individuals morphology, or physiological properties, indicates his __________.

  1. phenotype

  2. genotype

  3. haploid no. of chromosomes

  4. diploid no. of chromosomes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Phenotype is any observable characteristic or trait of an organism: such as its morphology, development, biochemical or physiological properties, behaviour, and products of behaviour (such as a bird's nest). Phenotypes result from the expression of an organism's genes as well as the influence of environmental factors and the interactions between the two.