Cell Cycle And Cell Division Chapter-Wise Test 8

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which event is unique to meiosis and does not occur in mitosis?

Chromosome condensation
Spindle fiber formation
Crossing over
Cytokinesis
3

Crossing over occurs during prophase I of meiosis and is responsible for genetic recombination.

What is the primary function of the centromere during cell division?

DNA replication
Protein synthesis
Spindle fiber attachment
Nucleolus formation
3

The centromere serves as the attachment site for spindle fibers, ensuring proper chromosome movement during division.

Which type of cell division occurs in the apical and lateral meristem of plants?

Mitosis
Meiosis
Binary fission
Endomitosis
1

Mitosis occurs in the apical and lateral meristem, leading to the continuous growth of plants.

Which of the following statements about meiosis is correct?

Meiosis occurs in both diploid and haploid cells
Meiosis involves two rounds of cell division
Meiosis results in the production of diploid cells
Meiosis does not contribute to genetic variation
2

Meiosis consists of two divisions (meiosis I and II) and produces haploid cells, contributing to genetic variation.

Which event marks the transition from prophase to metaphase in mitosis?

Chromosome condensation
Spindle fiber formation
Nuclear envelope breakdown
Cytokinesis
3

The complete disintegration of the nuclear envelope marks the transition from prophase to metaphase in mitosis.

Which of the following statements about prophase is incorrect?

Chromatin condenses into chromosomes
Nuclear envelope remains intact
Centrioles move to opposite poles
Spindle fibers begin to form
2

During prophase, the nuclear envelope breaks down, allowing the spindle fibers to interact with chromosomes.

Which of the following is correct about G2 phase?

G2 phase occurs before the S phase
The cell checks for DNA replication errors in G2 phase
G2 phase is longer than G1 phase
DNA replication takes place in G2 phase
2

The G2 phase is a checkpoint where the cell ensures that DNA replication was completed correctly before mitosis begins.

Which of the following statements about metaphase is incorrect?

Chromosomes align at the metaphase plate
Spindle fibers attach to kinetochores
Sister chromatids move to opposite poles
Metaphase is the best stage to study chromosome morphology
3

During metaphase, chromosomes align at the metaphase plate, but sister chromatids move to opposite poles in anaphase.

During which phase of mitosis do spindle fibers attach to kinetochores?

Prophase
Metaphase
Anaphase
Telophase
2

During metaphase, spindle fibers attach to kinetochores and align the chromosomes at the equatorial plate.

Which of the following is incorrect about genetic variation in meiosis?

Crossing over occurs during prophase I
Independent assortment occurs during metaphase I
Meiosis results in genetically identical cells
Genetic recombination occurs during meiosis
3

Meiosis produces genetically varied cells due to crossing over and independent assortment, not identical ones.

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