Cellular Reproduction and Cell Cycle Quiz

Ace our quiz on Cellular Reproduction and Cell Cycle to understand DNA replication, mitosis, meiosis, and key cell cycle checkpoints.

Practice Learn Test

Which phase of the cell cycle is characterized by DNA replication?

G1 phase

S phase

G2 phase

M phase

What is the correct sequence of stages in the cell cycle?

G1 phase -> S phase -> G2 phase -> M phase

G1 phase -> G2 phase -> S phase -> M phase

G2 phase -> G1 phase -> M phase -> S phase

S phase -> G1 phase -> M phase -> G2 phase

What is the purpose of cytokinesis in the cell cycle?

To replicate DNA

To ensure proper alignment of chromosomes

To divide the cytoplasm and separate the daughter cells

To initiate the process of cell division

Which enzyme is responsible for unwinding DNA during replication?

DNA polymerase

RNA polymerase

Helicase

Ligase

What is the purpose of the G1 checkpoint in the cell cycle?

To ensure proper alignment of chromosomes

To check for DNA damage

To separate sister chromatids

To initiate cytokinesis

Which checkpoint ensures that the DNA is undamaged before entering mitosis?

G1 checkpoint

G2 checkpoint

M checkpoint

S checkpoint

What is the significance of meiosis in sexual reproduction?

To produce genetically identical offspring

To produce haploid gametes

To increase genetic variation

To produce diploid cells

What happens during interphase of the cell cycle?

Cell division occurs

DNA replication occurs

Chromosomes condense

Chromosomes align at the metaphase plate

Which of the following is a characteristic of cancer cells?

Uncontrolled cell division

Strict adherence to cell cycle checkpoints

Normal functioning of tumor suppressor genes

Decreased angiogenesis

#10

What is the role of cyclin-dependent kinases (CDKs) in cell cycle regulation?

To degrade cyclins

To activate cyclins

To inhibit cyclins

To phosphorylate target proteins

#11

During which phase of mitosis do chromosomes align at the metaphase plate?

Prophase

Metaphase

Anaphase

Telophase

#12

What is the role of spindle fibers during mitosis?

To attach sister chromatids to each other

To separate sister chromatids and move them to opposite poles

To replicate DNA

To initiate cytokinesis

#13

What is the consequence of a mutation in a tumor suppressor gene?

Increased cell proliferation

Decreased cell proliferation

Increased DNA repair

Decreased apoptosis

#14

What is the significance of crossing over during meiosis?

It increases the number of chromosomes in daughter cells

It leads to genetic diversity

It ensures proper alignment of chromosomes

It initiates cytokinesis

#15

Which phase of mitosis is characterized by the physical separation of sister chromatids?