Cell Cycle And Cell Division
Test 1

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which phase of the cell cycle is responsible for DNA replication?

G1 phase
S phase
G2 phase
M phase
2

The S phase (Synthesis phase) is the stage where DNA replication occurs, doubling the genetic material.

What distinguishes anaphase I of meiosis from anaphase of mitosis?

Sister chromatids separate in meiosis but not in mitosis
Homologous chromosomes separate in meiosis but not in mitosis
DNA replication occurs in anaphase I
Centromeres do not split in mitosis
2

In anaphase I of meiosis, homologous chromosomes separate, whereas in mitosis, sister chromatids separate.

Which of the following events occurs during anaphase I of meiosis?

Sister chromatids separate
Homologous chromosomes separate
Chromosomes condense
Spindle fibers form
2

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

Which of the following statements about anaphase is correct?

Sister chromatids separate and move to opposite poles
Chromosomes align at the equator
DNA replication occurs
Chromosomes condense
1

During anaphase, sister chromatids separate and move toward opposite poles of the cell.

Which of the following statements about cytokinesis is correct?

Animal cells form a cleavage furrow
Plant cells divide by forming a cleavage furrow
Cytokinesis occurs before nuclear division
Cytokinesis does not occur in mitosis
1

In animal cells, cytokinesis occurs by forming a cleavage furrow, while in plant cells, a cell plate forms instead.

Which of the following events occurs in anaphase?

Chromosomes align at the center of the cell
Sister chromatids separate and move to opposite poles
Nuclear membrane reforms
Spindle fibers disassemble
2

During anaphase, sister chromatids separate and move toward opposite poles of the cell.

Which phase of mitosis directly follows metaphase?

Prophase
Anaphase
Telophase
Interphase
2

Anaphase follows metaphase, during which sister chromatids separate and move toward opposite poles.

Which checkpoint ensures proper chromosome alignment before anaphase begins?

G1 checkpoint
G2 checkpoint
M checkpoint
S checkpoint
3

The M checkpoint ensures that all chromosomes are properly aligned at the metaphase plate before anaphase begins.

What is the outcome of meiosis II?

Four haploid cells
Two diploid cells
Four diploid cells
Two haploid cells
1

Meiosis II results in four haploid daughter cells, each with half the chromosome number of the parent cell.

Which of the following happens during pachytene of meiosis I?

Chromosome condensation begins
Synapsis occurs
Crossing over between homologous chromosomes
Nuclear membrane reforms
3

During pachytene, homologous chromosomes exchange genetic material through crossing over.

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