CLEP CLEP Biology Cell Division: Mitosis and Meiosis

Question 1

During which phase of mitosis do chromosomes align at the cell's equatorial plate (metaphase plate)?

Accepted Answer

Metaphase

Answer

During metaphase, chromosomes are moved to the middle of the cell and align along the metaphase plate by spindle fibers attached to each kinetochore.

Question 2

Which checkpoint in the cell cycle verifies that DNA replication is complete and undamaged before allowing the cell to enter mitosis?

Accepted Answer

G2 checkpoint

Answer

The G2 checkpoint ensures that DNA has been fully and accurately replicated before the cell commits to mitotic division.

Question 3

Sister chromatids are held together until anaphase by proteins called cohesins at the region known as the:

Accepted Answer

Centromere

Answer

The centromere is the constricted region where cohesin proteins join sister chromatids; kinetochores assemble on centromeres to attach spindle fibers.

Question 4

During which phase of mitosis does the nuclear envelope reform around each set of chromosomes?

Accepted Answer

Telophase

Answer

Telophase is characterized by the reformation of the nuclear envelope around each set of chromosomes as the cell prepares to divide.

Question 5

Cytokinesis in animal cells is accomplished by the formation of a:

Accepted Answer

Cleavage furrow

Answer

Animal cells lack a cell wall, so cytokinesis occurs by a cleavage furrow—an actin-myosin contractile ring that pinches the cell in two.

CLEP Practice Test

CLEP Practice Test

CLEP CLEP Biology Cell Division: Mitosis and Meiosis