Cell Cycle And Cell Division Chapter-Wise Test 13

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following does NOT occur in interphase?

DNA replication
Organelle duplication
Chromosome segregation
Protein synthesis
3

Chromosome segregation occurs during mitosis, whereas interphase is mainly for growth, DNA replication, and preparation for division.

Which of the following statements about G2 phase is correct?

G2 phase occurs after mitosis
Cell growth and protein synthesis occur in G2 phase
DNA replication takes place in G2 phase
G2 phase is shorter than M phase
2

During G2 phase, the cell prepares for mitosis by growing and synthesizing proteins required for division.

Which phase of the cell cycle is known as the "synthesis phase"?

G1 phase
G2 phase
S phase
M phase
3

The S phase (synthesis phase) is when DNA replication occurs, doubling the genetic material in preparation for cell division.

Which of the following is incorrect about telophase II?

Nuclear envelope reforms
Cytokinesis occurs
Four diploid cells are produced
Chromosomes decondense
3

Telophase II results in four haploid cells, not diploid cells.

What is the key feature of diplotene in meiosis I?

Chromosome condensation
Synapsis of homologous chromosomes
Separation of homologous chromosomes except at chiasmata
Formation of the mitotic spindle
3

In diplotene, homologous chromosomes start separating but remain attached at chiasmata where crossing over occurred.

During which phase of meiosis does synapsis occur?

Leptotene
Zygotene
Pachytene
Diplotene
2

Synapsis occurs during zygotene, where homologous chromosomes pair up and form synaptonemal complexes.

Which of the following statements about metaphase is incorrect?

Chromosomes align at the metaphase plate
Spindle fibers attach to kinetochores
Nuclear membrane reforms
Metaphase is the best stage to study chromosome morphology
3

During metaphase, the nuclear membrane remains absent; it reforms during telophase.

Which of the following is incorrect about meiosis?

Meiosis I and II both include prophase, metaphase, anaphase, and telophase
Meiosis II resembles mitosis
DNA replication occurs between meiosis I and II
Meiosis results in four haploid cells
3

DNA replication does not occur between meiosis I and II.

Which phase in the cell cycle follows DNA replication?

G1 phase
S phase
G2 phase
M phase
3

G2 phase follows the S phase and involves the synthesis of proteins required for mitosis.

Which stage of meiosis ensures the reduction of chromosome number?

Metaphase I
Anaphase I
Prophase II
Anaphase II
2

In anaphase I, homologous chromosomes separate, reducing the chromosome number by half.

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