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 genetic testing method is commonly used to diagnose chromosomal abnormalities?

  1. Karyotyping

  2. Fluorescence in situ hybridization (FISH)

  3. Comparative genomic hybridization (CGH)

  4. Single-nucleotide polymorphism (SNP) array
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Karyotyping is a genetic testing method that analyzes the number and structure of chromosomes in an individual's cells, allowing for the identification of chromosomal abnormalities such as aneuploidy and structural rearrangements.

Multiple choice

What is a chromosome?

  1. A long molecule of DNA

  2. A short molecule of DNA

  3. A long molecule of RNA

  4. A short molecule of RNA
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A chromosome is a long molecule of DNA.

Multiple choice

Which of the following is the process by which a single cell divides into two identical daughter cells?

  1. Mitosis

  2. Meiosis

  3. Binary Fission

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

Mitosis is a type of cell division that results in two genetically identical daughter cells, each with the same number of chromosomes as the parent cell.

Multiple choice

In mitosis, the chromosomes are duplicated during which phase?

  1. Prophase

  2. Metaphase

  3. Anaphase

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

During prophase, the chromosomes become visible and are duplicated, resulting in two identical copies of each chromosome.

Multiple choice

Which structure in a cell is responsible for separating the chromosomes during mitosis?

  1. Centromere

  2. Spindle Fibers

  3. Nucleolus

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

Spindle fibers are responsible for separating the chromosomes and moving them to opposite poles of the cell during mitosis.

Multiple choice

What is the primary function of meiosis?

  1. Growth and Development

  2. DNA Repair

  3. Genetic Variation

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

Meiosis is a type of cell division that results in four daughter cells, each with half the number of chromosomes as the parent cell, promoting genetic variation.

Multiple choice

In meiosis, how many rounds of division occur?

  1. One

  2. Two

  3. Three

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

Meiosis consists of two rounds of division, meiosis I and meiosis II, resulting in four daughter cells.

Multiple choice

Which phase of meiosis is responsible for the separation of homologous chromosomes?

  1. Prophase I

  2. Metaphase I

  3. Anaphase I

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

During anaphase I of meiosis, the homologous chromosomes separate and move to opposite poles of the cell.

Multiple choice

What is the role of crossing over in meiosis?

  1. Chromosome Duplication

  2. Genetic Variation

  3. Energy Production

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

Crossing over during meiosis leads to genetic variation by exchanging genetic material between homologous chromosomes.

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 not a type of cell division, but rather a type of asexual reproduction.

Multiple choice

What is the process by which genetic material is exchanged between two homologous chromosomes during meiosis?

  1. Mutation

  2. Recombination

  3. Gene transfer

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

Recombination is the process by which genetic material is exchanged between two homologous chromosomes during meiosis. This process results in the formation of new chromosomes that contain a mixture of genetic material from both parents.

Multiple choice

What is the term for the process by which genetic material is exchanged between two homologous chromosomes during meiosis?

  1. Mutation

  2. Recombination

  3. Gene transfer

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

Recombination is the term for the process by which genetic material is exchanged between two homologous chromosomes during meiosis. This process results in the formation of new chromosomes that contain a mixture of genetic material from both parents.

Multiple choice

What is the term for the process by which cells lose their ability to divide?

  1. Senescence

  2. Apoptosis

  3. Necrosis

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

Senescence is the term for the process by which cells lose their ability to divide.

Multiple choice

What is the name of the process by which cells divide?

  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.

Multiple choice

What is the name of the process by which sex cells are produced?

  1. Mitosis

  2. Meiosis

  3. Binary fission

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

Meiosis is the process by which sex cells are produced.