Chapter 9 Nucleic Acids

Question 1

Nucleotide?

Answer 1

Nitrogenous base
Pentose
Phosphate

Question 2

Nucleoside

Answer 2

Nitrogenous base

Pentose

Question 3

Nucleobase?

Answer 3

Nitrogeneous base

Question 4

What is the general structure of nucleotides?

Answer 4

A phosphate group attached onto a 5 carbon sugar by a phosphoester bond and a purine or pyramidine attached on with a glycosidic bond

Question 5

How do we link two nucleotides together?

Answer 5

The hydroxyl attaches onto phosphate group and we have a phospho diester linkage

Question 6

How are DNA sequences written?

Answer 6

5’ to 3’

Question 7

What are oligonucleotides?

Answer 7

Less than 50 nucleotides in length

Question 8

What are DNA AND RNA sensitive to?

Answer 8

Alkaline hydrolysis

Question 9

What were the names of the three experiments?

Answer 9

The transforming principle
The avery McLeod McCarty
The Hershey and chase

Question 10

What did the transforming principle conclude?

Answer 10

The storage of genetic material

Question 11

What did the Avery McLeod conclude?

Answer 11

The transforming factor is nucleic acids

Question 12

What did Hershey and chase conclude?

Answer 12

That NA were responsible for the storage and transfer of genetic material

Question 13

What is chargaffs rule

Answer 13

A+C= T+G

Question 14

What is the length of space between the base pairs

Answer 14

3A

Question 15

Is the double helix right handed or left?

Answer 15

Right

Question 16

What points outside and what points inside?

Answer 16

Phosphate groups are outside

Bases inside

Question 17

What is the width of the double helix?

Answer 17

20A

Question 18

What is the pitch of the helix (one turn)

Answer 18

36A or 10.4 nucleotides

Question 19

What is present on RNA but not DNA?

Answer 19

A hydroxyl group no O atom at C2

Question 20

Is DNA uni or bi directional

Answer 20

Bi directional