Block 3 - Lec 26/27

Question 1

semi conservative involves the blank strand serving as a template for a new strand

Answer 1

old

Question 2

conservative model is that a new double helix is made from an old blank

Answer 2

double helix

Question 3

dispersive model is when old strand is blank to form multiple new strands

Answer 3

split up

Question 4

during dna replication, you can tell the difference between primer and template strand by noticing that the primer strand has this base

Answer 4

uracil

Question 5

most dna replication in nature is blank directional

Answer 5

bidirectional

Question 6

during replication, these are formed on the discontinuous strand

Answer 6

okazaki fragments

Question 7

dna polymerase that seems to actually do the replication

Answer 7

3

Question 8

theta model of replication involves a blank of dna

Answer 8

ring

Question 9

dna polymerase does proofreading.. when an incorrect base is inserted… a blank activity recognzies the mismatch and changes it out

Answer 9

3’ exonuclease

Question 10

dna polymerase 2 is for blank

Answer 10

dna repair

Question 11

dna polymerase blank fills gap after removing rna primer, repairs dna, work with rnaase H

Answer 11

1

Question 12

gaps in dna cannot be fixed by blank, but blank can

Answer 12

dna polymerase, ligase

Question 13

dna polymerase is an assembly of blank

Answer 13

polypeptides

Question 14

replication at both forks results in the blank form

Answer 14

theta

Question 15

where dna replication begins

Answer 15

origin

Question 16

dna polymerase requires a free 3’ blank on the primer so we start with blank instead because it is not required

Answer 16

OH, RNA

Question 17

unwinding dna double strand for replication is accomplished by blank

Answer 17

helicase

Question 18

to prevent unwound single strand dna from pairing back up… single strand blank are used

Answer 18

binding proteins

Question 19

dna polymerase 3 is a blank enzyme

Answer 19

holo

Question 20

assists helicase to relieve stress during unwinding

Answer 20

gyrase topoisomerase

Question 21

a very long chromosome must have mutliple blank and undergo blank replication

Answer 21

origins, bidirectional

Question 22

you can start a second replication before blank is done… as in blank

Answer 22

first, e coli

Question 23

four phases of cell cycle

Answer 23

Mitosis, G1 growth, S DNA replication, G2 prepare for cell division

Question 24

although dna replication is semiconservative, histone replication is blank

Answer 24

dispersive

Question 25

uv light can damage dna by forming blank dimers

Answer 25

pyramidine

Question 26

uv pyramidine dimers can be repaired by blank enzyme

Answer 26

photoreactiving

Question 27

having 2 sexes allows for blank

Answer 27

recombination

Question 28

recombination requires mitosis or meiosis

Answer 28

meiosis

Question 29

most recombination occurs by a blank mechanism

Answer 29

break join

Question 30

inhibitors of replication do not necessarily inhibit blank

Answer 30

recombination

Question 31

one copy of each gene

Answer 31

haploid

Question 32

two copy of each gene

Answer 32

diploid

Question 33

dna replication can look blank but it’s actually semi conservative with a whole lot of blank

Answer 33

dispersive, recombination

Question 34

endonucleases, ligase, ss binding proteins, dna polymerase are all involved in blank and blank

Answer 34

repair, recombination

Question 35

mesleson stahl came up with the blank model of replication

Answer 35

semi conservative