DNA structure

Question 1

Structure of DNA

Answer 1

Nucleotides
-deoxyribose-sugar (5c)
-phosphate
-nitrogenous base (ATCG)

Question 2

DNA HELIX MODEL
Purine + purine=?
pyrimidine+pyrimidine=?
purine+ pyrimidines=?

Answer 2

=to wide
=to narrow
=width consistent with x ray data shown with rosalind’s data

Question 3

what are the purines and how many rings do they have

Answer 3

adenine and guanine and has 2 rings

Question 4

what are the pyrimidines and how many rings do they have

Answer 4

thymine and cytosine they have 1 ring

Question 5

covalent bonds link=

Answer 5

sugar phosphate backbone

Question 6

phosphodiester linkages

Answer 6

another name for the covalent bond links,3c of sugar bonded to 5’ phosphate

Question 7

5’end-5’c attatcthed to

Answer 7

phosphate

Question 8

3’end-3’c attatched to

Answer 8

hydroxyl

Question 9

hydrogen bonding between

Answer 9

N bases

Question 10

how many bonds for A-T

Answer 10

2 h bonds

Question 11

how many bonds for G-C

Answer 11

3 h bonds

Question 12

complementary base pairing rules

Answer 12

3’ A T G C 5’
ll ll lll lll
5’ T A C G 3’

Question 13

the # of possible sequences are virtually

Answer 13

impossible to count

Question 14

be able to label DNA diagram

Answer 14

do it

Question 15

DNA replication happens during what mitosis phase

Answer 15

s phase

Question 16

semiconservative

Answer 16

each strand of DNA is template to make opposite new strand