Nucleic Acids / DNA ch 3

Question 1

nucleotide

Answer 1

long polymers of repeating subunits. each contains 3 components: pentose (5 carbon sugar), either ribose or deoxyribose: phosphate : and nitrogenous base

Question 2

nucleic acid

Answer 2

chain of 5 carbon sugars linked together by phosphodiester bonds with a nitrogenous base protruding from each sugar.

Question 3

ester

Answer 3

product of an acid and an alochol

Question 4

which side do DNA helixes lean towards?

Answer 4

right handed- to the right side

Question 5

what type of bonds hold bases together in DNA/RNA?

Answer 5

hydrogen bonds

Question 6

how many H-bonds do base pairs have?

Answer 6

G,C: 3 H-bonds. A,T: 2 H-bonds

Question 7

How many bases are there per turn of the DNA helix?

Answer 7

10

Question 8

how long is DNA?

Answer 8

3.4 nm

Question 9

what are the purines?

Answer 9

adenine + guanine: double rings

Question 10

pyrimidines

Answer 10

cytosil, thymine, uracil : single rings

Question 11

what is secondary structure?

Answer 11

when RNA folds over onto itself , forming hydrogen bonds with its own base pairs

Question 12

What is ATP composed of?

Answer 12

Triphosphate group, 5-carbon sugar, and adenine

Question 13

what is a nucleoside?

Answer 13

base + sugar

Question 14

what is adenosine?

Answer 14

adenine + sguar