ch 8 part 2 reviews

Question 1

cell cycle points

Answer 1

points at which progression to the next stage can be stopped

Question 2

3 primary checkpoints:

Answer 2

G1/S: assessing DNA growth and damage
G2/M: assessing DNA synthesize
Spindle Assembly Checkpoint: is the cell ready for anaphase

Question 3

complementary base pairing?

Answer 3

each strand contain the information needed to synthesize its complementary strand
steps :
1-parent DNA molecules
2-then saperate into two template strands
3-complimentary nucleotide bases attach to each
4-template strand
5-two identical daughter molecules

Question 4

DNA Replication

Answer 4

Two steps:
Unwinding and separation
Reconstruction and elongation

Question 5

Step 1: Unwinding and separation

Answer 5

Begins at the origin of the replication
DNA helicase

Replication fork

Question 6

DNA helicase

Answer 6

-unwind the DNA
-seperate the two strand

Question 7

Step 2: Reconstruction and elongation

Answer 7

Synthesis of the new DNA strands

Question 8

each of the five carbon in the sugar is numbered

Answer 8

sugar phosphate backbone

Question 9

DNA replication deponds on__________

Answer 9

base-pairing rules

Question 10

Unwound sections of __________ DNA strands serve as _________ for synthesis of new complementary DNA strands

Answer 10

parental
templates

Question 11

DNA polymerase

Answer 11

Adds nucleotides to the 3’-end of the growing strand
New strand is synthesized

Question 12

DNA polymerases proofread their work

Answer 12

Mismatch repair: daughter strand repair single base pair error
Nucleotide excision repair: larger error repair

Question 13

Any errors that are missed are passed onto the daughter DNA and become ______________

Answer 13

permanent mutations