Replication and DNA pre-quiz

Question 1

Which enzyme is responsible for relieving strain on the double stranded DNA helix?

Answer 1

topoisomerase

Question 2

The process of mitosis ensures that…

Answer 2

each new cell receives the proper number of chromosomes

Question 3

DNA ligase function to…

Answer 3

catalyze the formation of covalent bonds between adjacent 5’-P and 3’-OH termini

Question 4

Unwinding the double stranded DNA helix to separate the template stands requires a…

Answer 4

helicase

Question 5

The ORI
1) is a specific sequence on a chromosome
2) contains many adenines and thymines
3) is the location where DNA template strands begin unwinding before replication
4) all of the above

Answer 5

4

Question 6

The double strands of a DNA molecule are…

Answer 6

complementary in base sequence and antiparallel

Question 7

A cell that has 20 chromosomes undergoes meiosis, how many daughter cells are created and how many chromosomes do each have?

Answer 7

4 daughter cells, each having 10 chromosomes

Question 8

DNA synthesis proceeds by the elongation of primer chains, always in the…

Answer 8

5’ to 3’ direction

Question 9

How do the sugars of RNA and DNA differ?

Answer 9

the sugar of RNA has a hydroxyl group that is not found in the sugar of DNA

Question 10

At what phase in the cell cycle does DNA replication occur?

Answer 10

S-phase