Cell Division Quiz

If you used a very fine glass needle to pull one chromosome away from the metaphase plate during metaphase, which checkpoint would not be passed until this was corrected?

• M checkpoint

• S checkpoint

• G₁ checkpoint

• G2 checkpoint

Binary fission is more like animal cell division than plant cell division because

• bacteria and animals both have two copies of each chromosome, while plants have four.

• bacteria and animals have more organelles than plants.

• bacteria and animals both pinch in to separate into two pieces.

• bacteria and animals use microfilaments to divide the cell.

Eukaryotic chromatin is composed of which of the following macromolecules?

• DNA and proteins

• DNA only

• DNA and phospholipids

• DNA and RNA

After DNA replication, each duplicated chromosome consists of two of which of the following structures?

• sister chromatins

• sister chromatids

• daughter nucleosomes

• daughter chromosomes

What is the name of the region on duplicated chromosomes where the sister chromatids are most closely attached to each other?

• the cohesion

• the centrosome

• the centromere

• the chromatin

In a diploid cell with four chromosome pairs (2n = 8), how many centromeres will be found in a nucleus at G₂ of the cell division cycle?

• 16

• 32

• 8

• 4

Students in a biology lab isolated cells in various phases of the cell cycle. A population of cells that have twice the DNA of G₁ phase cells was most likely isolated from which of the following parts of the cell cycle?

• at the beginning of the S phase

• immediately after cytokinesis

• in the G2 phase

• between the G₁ and S phase

Which of the following cellular events occur in the G₁ phase of the cell division cycle?

• break down of the nuclear membrane

• normal growth and cell function

• DNA replication

• the beginning of mitosis

What is the name of the microtubule-organizing center found in animal cells as an identifiable structure present during all phases of the cell cycle?

• centriole

• kinetochore

• centrosome

• centromere

The mitotic spindle plays a critical role in which of the following processes?

• splitting of the cell (cytokinesis) following mitosis

• triggering condensation of chromosomes

• dissolving the nuclear membrane

• separation of sister chromatids