Question 1

Which of the following best describes the function of mitosis in multicellular organisms?

Accepted Answer

Wound healing, cell replacement, and growth

Question 2

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 3

A cell in the G0 stage:

Accepted Answer

Has withdrawn from the cell cycle

Question 4

Which protein complex is responsible for holding sister chromatids together during mitosis?

Accepted Answer

Cohesin

Question 5

What is the main outcome of meiosis in diploid organisms?

Accepted Answer

Production of four haploid gametes

Question 6

Which of the following statements about homologous chromosomes is correct?

Accepted Answer

They carry the same genes at the same loci

Question 7

In humans, what is the diploid number of chromosomes?

Accepted Answer

$$2n = 46$$

Question 8

Which organelle is the site of ATP synthesis and contains its own DNA?

Accepted Answer

Mitochondrion

Question 9

What is the significance of crossing over during meiosis?

Accepted Answer

It increases genetic variation among offspring

Question 10

Which checkpoint in the cell cycle ensures that DNA is properly replicated before mitosis begins?

Accepted Answer

G2 checkpoint

Question 11

A haploid cell in humans contains:

Accepted Answer

One complete set of chromosomes ($$n = 23)$$

Question 12

Which of the following best describes the role of spindle fibers during mitosis?

Accepted Answer

They move chromosomes during cell division

Question 13

Which of the following is NOT a function of the rough endoplasmic reticulum?

Accepted Answer

Site of lipid synthesis

Question 14

During anaphase of mitosis, what event occurs?

Accepted Answer

Sister chromatids are separated and pulled to opposite poles

Question 15

Which of the following is true about prokaryotic cells?

Accepted Answer

Their DNA is compacted into a nucleoid region

Question 16

If a cell has a diploid number of 8 chromosomes, how many chromosomes will each gamete have after meiosis?

Accepted Answer

$$4$$

Question 17

Which of the following centromere placements describes a chromosome with the centromere at the end?

Accepted Answer

Telocentric

Question 18

Which of the following is a consequence of nondisjunction during meiosis?

Accepted Answer

Some gametes have missing or extra chromosomes

Question 19

Which of the following statements about cell cycle regulation is correct?

Accepted Answer

Cyclins bind with kinases to activate them at appropriate times

Question 20

Which of the following is NOT a difference between mitosis and meiosis?

Accepted Answer

Mitosis involves crossing over; meiosis does not

Ch. 2 Mitosis and Meiosis: Cellular Basis of Genetic Continuity

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