DNA, genes and genomes

Question 1

What is a nucleotide?

Answer 1

Phosphate ester of nucleoside.

Question 2

What is the difference between Deoxyribose-nucleotides and ribose?

Answer 2

Have a H on C2 rather than OH.

Question 3

Which nucleotides are pyrimidines (one ring)?

Answer 3

C
U
T

Question 4

What nucleotides are purines?

Answer 4

G
A

Question 5

What bases are in DNA?

Answer 5

dA = deoxyadenosine
dT = deoxythymidine
dG = deoxyguanosine
dC = deoxycytidine

Question 6

What bases are in RNA?

Answer 6

A, U, G, C

Question 7

What is a nucleoside?

Answer 7

Base + sugar

Question 8

What is a nucleotide made of?

Answer 8

Nucleoside (base + sugar) and phosphate

Question 9

What bond occurs to form the sugar phosphate backbone?

Answer 9

Phosphodiester bond

Question 10

What direction does synthesis occur?

Answer 10

5’ to 3’

Question 11

How many h bonds between A and T?

Answer 11

2

Question 12

How many h bonds between G and C?

Answer 12

3

Question 13

What are some of the forms DNA can take up?

Answer 13

B
A
Z

Question 14

What is B form DNA?

Answer 14

DNA as you expect.
Bases are perpendicular to axis of DNA.
Bases inside, phosphate outside.
Sides of bases are displayed in the minor and major grooves.