DNA replication

Question 1

DNA helicase

Answer 1

enzyme that unzips the DNA

Question 2

DNA polymerase

Answer 2

enzyme that connects a strand of DNA to another to form a complete helix

Question 3

replication fork

Answer 3

the ends of each replication bubble

Question 4

replication bubble

Answer 4

the origins of the DNA helicase unzipping the DNA

Question 5

prokaryotes form how many rep. bubbles?

Answer 5

one

Question 6

eukaryotes form how many rep. bubbles?

Answer 6

multiple

Question 7

semiconservative model of replication

Answer 7

separated strands act as templates for a new complementary strand to form two DNA helix’s

Question 8

DNA polymerase can only add new nucleotides to the

Answer 8

3’ ends- strands will be built in a 5’ to 3’ direction

Question 9

prokaryotic DNA rep.

Answer 9

since the strand is like a ring there is only one bubble that goes in two directions

Question 10

which enzyme proofreads DNA

Answer 10

Exonuclease and polymerase

Question 11

how many mistakes are made in base pairs?

Answer 11

1 in 10000

Question 12

how many mistakes in base pairs after correction?

Answer 12

1 in 1 billion

Question 13

what damage DNA?

Answer 13

chemicals and radiation

Question 14

excision repair

Answer 14

when any of over 50 repair enzymes remove damages pairs of DNA

Question 15

role of DNA ligase and polymerase in excision repair

Answer 15

they insert and bond the new nucleotides together after the damaged DNA is taken out