AP Bio: Chapter 9 The Cell Cycle

Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early embryo with how many cells?

• 4

• 8

• 16

• 32

Tags

NGSS.HS-LS1-4

If there are 20 chromatids in a cell, how many centromeres are there?

• 10

• 20

• 30

• 40

Tags

NGSS.HS-LS1-4

In eukaryotic cells, chromosomes are composed of DNA

• and RNA

• only

• and Proteins

• and Phosphates

Tags

NGSS.HS-LS3-1

What is produced if a cell divides by mitosis but does not undergo cytokinesis?

• two cells, one cell containing two nuclei and a second cell without a nucleus

• two cells, each cell with half of the genetic material of the parent cell

• one cell with one nucleus containing half of the genetic material of the parent cell

• one cell with two nuclei, each identical to the nucleus of the parent cell

Tags

NGSS.HS-LS1-4

Humans produce skin cells by mitosis and gametes by meiosis. The nuclei of skin cells produced by mitosis will have

• half as much DNA as the nuclei of gametes produced by meiosis.

• the same amount of DNA as the nuclei of gametes produced by meiosis.

• twice as much DNA as the nuclei of gametes produced by meiosis.

• four times as much DNA as the nuclei of gametes produced by meiosis.

Compared to most prokaryotic cells, eukaryotic cells typically have

• more DNA molecules and larger genomes.

• the same number of DNA molecules but larger genomes

• the same number of DNA molecules and similarly sized genomes.

• fewer DNA molecules but larger genomes

If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis?

• 10

• 20

• 30

• 40

Tags

NGSS.HS-LS1-4

Taxol is an anticancer drug extracted from the Pacific yew tree. In animal cells, Taxol disrupts microtubule formation by binding to microtubules and accelerating their assembly from the protein precursor tubulin. Surprisingly, this stops mitosis. Specifically, Taxol must affect

• the formation of the mitotic spindle.

• anaphase

• formation of the centrioles

• chromatid assembly.

Tags

NGSS.HS-LS1-4

Movement of the chromosomes during anaphase would be most affected by a drug that prevents

• nuclear envelope breakdown.

• cell wall formation

• elongation of microtubules.

• shortening of microtubules.

Tags

NGSS.HS-LS1-4

Measurements of the amount of DNA per nucleus were taken on a large number of cells from a growing fungus. The measured DNA levels ranged from 3 to 6 picograms per nucleus. In which stage of the cell cycle did the nucleus contain 6 picograms of DNA?

• G0

• G1

• S

• G2