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

Which of the following is the basic unit of heredity?

  1. Gene

  2. Chromosome

  3. Cell

  4. Organism
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A gene is a region of DNA that codes for a specific protein or RNA molecule.

Multiple choice

What is the process by which cells divide to produce new cells?

  1. Mitosis

  2. Meiosis

  3. Binary Fission

  4. Budding
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mitosis is the process by which cells divide to produce two identical daughter cells.

Multiple choice

The process of cell division that results in two genetically identical daughter cells is called:

  1. Mitosis

  2. Meiosis

  3. Binary fission

  4. Budding
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mitosis is the process of cell division that produces two genetically identical daughter cells.

Multiple choice

Which growth factor is involved in the regulation of the cell cycle?

  1. Epidermal growth factor (EGF)

  2. Platelet-derived growth factor (PDGF)

  3. Transforming growth factor-beta (TGF-beta)

  4. Fibroblast growth factor (FGF)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Transforming growth factor-beta (TGF-beta) is involved in the regulation of the cell cycle.

Multiple choice

Which of the following is NOT a common method for cell synchronization in cell culture?

  1. Serum starvation

  2. Double thymidine block

  3. Mitotic inhibitors

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

Temperature shock is not typically used for cell synchronization in cell culture. Serum starvation, double thymidine block, and mitotic inhibitors are more commonly employed methods.

Multiple choice

Which genetic condition is characterized by the presence of an extra copy of chromosome 21?

  1. Down syndrome

  2. Turner syndrome

  3. Klinefelter syndrome

  4. Angelman syndrome
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Down syndrome is caused by the presence of an extra copy of chromosome 21 and is associated with various physical and intellectual disabilities, including an increased risk of eye problems.

Multiple choice

Which genetic condition is characterized by the presence of an extra copy of the X chromosome?

  1. Klinefelter syndrome

  2. Turner syndrome

  3. Down syndrome

  4. Angelman syndrome
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Klinefelter syndrome is caused by the presence of an extra copy of the X chromosome and is associated with various physical and intellectual disabilities, including an increased risk of eye problems.

Multiple choice

Which genetic condition is characterized by the presence of an extra copy of the Y chromosome?

  1. Klinefelter syndrome

  2. Turner syndrome

  3. Down syndrome

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

XYY syndrome is caused by the presence of an extra copy of the Y chromosome and is associated with various physical and intellectual disabilities, including an increased risk of eye problems.

Multiple choice

The term "intersex" refers to:

  1. Individuals with ambiguous genitalia

  2. Individuals with a chromosomal disorder

  3. Individuals with a hormonal disorder

  4. Individuals with a physical disorder
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The term "intersex" refers to individuals who are born with ambiguous genitalia, meaning that their sex cannot be clearly defined as male or female.

Multiple choice

Which of the following is NOT a type of cell division?

  1. Mitosis

  2. Meiosis

  3. Binary Fission

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

Budding is a type of asexual reproduction, not cell division.

Multiple choice

What is the purpose of mitosis?

  1. Cell growth and repair

  2. Production of gametes

  3. Genetic variation

  4. Cell differentiation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mitosis is responsible for cell growth and repair, producing two genetically identical daughter cells.

Multiple choice

What is the significance of meiosis?

  1. Production of gametes

  2. Cell growth and repair

  3. Genetic variation

  4. Cell differentiation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Meiosis is responsible for producing gametes (sex cells), which have half the number of chromosomes as somatic cells.

Multiple choice

What is the term used to describe the process by which cells divide and reproduce?

  1. Cell division

  2. Mitosis

  3. Meiosis

  4. Binary fission
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cell division is the process by which cells divide and reproduce. It is essential for the growth and development of organisms.

Multiple choice

Which of the following is NOT a type of cell division?

  1. Mitosis

  2. Meiosis

  3. Binary fission

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

Budding is a type of asexual reproduction in which a new organism grows out of the body of the parent organism. It is not a type of cell division.

Multiple choice

Which of the following is a biological factor that influences gender identity?

  1. Chromosomes

  2. Hormones

  3. Brain structure

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

Chromosomes, hormones, and brain structure are all biological factors that have been found to influence gender identity.