Dna 16-18

Question 1

Dna synthesize from

Answer 1

5’ to 3’

Question 2

What is the term topoisomerase

Answer 2

It is when the DNa has many forms

Question 3

Helicase function

Answer 3

Unzip dna for initial insertion

Question 4

Exonuclease function

Answer 4

To clip out the primers

Question 5

Primers are made from what

Answer 5

Rna

Question 6

What connects the gaps between dna fragments

Answer 6

Ligase

Question 7

Whats a dna cap

Answer 7

Telomere (shows the end of the strand)

Question 8

Po3 function

Answer 8

Enlongation

Question 9

Po1 function

Answer 9

Clean primers, and fill in the gaps

Question 10

Common function between po1 and po3

Answer 10

Can both proofread

Question 11

Types of mutation

Answer 11

Substitution, deletion and insertion

Question 12

What checks for mutation

Answer 12

MuTL (checks the methylation of the dna)

Question 13

What removes the mutation

Answer 13

MUTH (removes and ligase would connect the back)

Question 14

Muts function

Answer 14

Proofread again

Question 15

Uc effect on dna

Answer 15

They can cause the cross link of the thymine. Remove by phosphorylation

Question 16

Whats translesion

Answer 16

Forcing the completion eventhough theres an error cause it cannot be fixed

Question 17

Po4 and 5 function

Answer 17

Po4 would overlook a damage whereas po5 would not

Question 18

Whats a double base strand repair

Answer 18

If the strand is homo= make a new strand
If the strand is hetero= ligase fix

Question 19

function of tata

Answer 19

dictate the replication direction

Question 20

steps to regulation of gene

Answer 20

sequence -> promoter -> tata

Question 21

positive control eg

Answer 21

lac opéron

Question 22

negative control

Answer 22

trp operon

Question 23

what are opérons

Answer 23

a cluster of gene that is controlled via on or off switch. responsible for many related expressions

Question 24

name bacteria opérons

Answer 24

lac z, lac y, lac a

Question 25

lac opérons should normally be

Answer 25

off

Question 26

function of operator

Answer 26

the in or off switch

Question 27

how does lac op. works

Answer 27

once lactose is present in the system, binds to the repressor to remove them. the synthesis runs and proteins are made to digest the lactose

Question 28

can lac be positive

Answer 28

yes. according tô the amount of lac in the lac1

Question 29

how many trp proteins are there

Answer 29

5

Question 30

trp is normally on or off

Answer 30

on

Question 31

transcription factor pathway

Answer 31

protein binds promoter then to enchaine then the synthesis can take place

Question 32

what makes trp turns off

Answer 32

triptrophan

Question 33

what happened when there not triptrophan

Answer 33

operator works (always on) and triptrophan is made