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 biology life processes: control and coordination nervous system in animals structure of neuron structure and function of neuron

Synapse is......

  1. Crossing over between nonhomologous chromosomes

  2. Pairing of homologous chromosomes

  3. Junction between axon and dendrite of two different neurons

  4. Zigzag junction in cardiac muscle fibres
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A synapse is defined as the junction between the axon of one neuron and the dendrite of another, facilitating the transmission of nerve impulses.

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. Mitosis, meiosis, and binary fission are the three main types of cell division.

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

What is the role of epigenetics in synaptogenesis?

  1. It can modify the expression of genes that are involved in synaptogenesis

  2. It can change the structure of chromatin, which can affect gene expression

  3. It can alter the activity of neurons, which can lead to changes in synaptogenesis

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

Epigenetics plays a role in all three aspects of synaptogenesis: it can modify the expression of genes that are involved in synaptogenesis, it can change the structure of chromatin, which can affect gene expression, and it can alter the activity of neurons, which can lead to changes in synaptogenesis.

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.