Mitosis and meiosis

Question 1

Where is DNA primarily stored?

Answer 1

Nucleus

Question 2

What does a double helix coil around?

Answer 2

Nucleosomes

Question 3

What is the purpose of a telomere?

Answer 3

Prevents chromosome from unravelling

Question 4

What enzyme rebuilds telomeres?

Answer 4

Telemerase

Question 5

How many base pairs in each chromosomes?

Answer 5

10^7

Question 6

What stains can chromosomes be stained with?

Answer 6

Giemsa (G banding) and quinacrine (Q banding)

Question 7

How many base pairs in each band of a chromosome?

Answer 7

6-8 million

Question 8

What does mitosis produce?

Answer 8

Two daughter cells, which are identical to parent cells

Question 9

What is the purpose of mitosis?

Answer 9

• Growth
• Replace dead cells

Question 10

How often are cells that line the small intestine replaced?

Answer 10

Every 72 hours

Question 11

How often are RBCs replaced?

Answer 11

120 days

Question 12

What occurs in the synthesis phase?

Answer 12

DNA and centromere replication

Question 13

What occurs in prophase?

Answer 13

• Chromatin condenses into chromosomes
• Centrosomes nucleate microtubules and more to opposite poles of the nucleus

Question 14

What occurs in prometaphase?

Answer 14

• Nuclear membrane breaks down
• Microtubules invade nuclear space
• Chromatids attach to microtubules

Question 15

What occurs in metaphase?

Answer 15

Chromosomes line up along equatorial plane

Question 16

What occurs in anaphase?

Answer 16

Sister chromatids separate and are pulled to opposite poles of the cell