2.6 DNA

Question 1

What does the structure of DNA allow?

Answer 1

Efficient storage of genetic information

Question 2

What protein is DNA coiled around?

Answer 2

Histones

Question 3

What is the backbone of DNA made of?

Answer 3

Sugar-Phosphate

Question 4

What are the names of the nitrogenous bases?

Answer 4

Adenine
Guanine
Thymine
Cytosine
Uracil (for RNA)

Question 5

What is nucleotide made up of?

Answer 5

Phosphate, Sugar, and a Base

Question 6

What type of bond joins the phosphate, sugar, and nitrogenous base of a nucleotide?

Answer 6

Covalent bond

Question 7

What sugar is present in the polymer DNA?

Answer 7

Deoxyribose

Question 8

What sugar is present in the polymer RNA?

Answer 8

Ribose

Question 9

How many carbon atoms are in the sugar of DNA and RNA?

Answer 9

5

Question 10

Which nitrogenous base is present in RNA but not DNA?

Answer 10

Uracil

Question 11

How many strands does RNA contain?

Answer 11

1

Question 12

How many strands does DNA contain?

Answer 12

2 (anti-parallel complementary strands)

Question 13

Which base pairs with Adenine? (DNA)

Answer 13

Thymine

Question 14

Which base pairs with Adenine? (RNA)

Answer 14

Uracil

Question 15

Which base pairs with Guanine?

Answer 15

Cytosine

Question 16

What type of bond joins the bases?

Answer 16

Hydrogen bond

Question 17

Which are the Purine bases?

Answer 17

Adenine and Guanine

Question 18

Which are the Pyramidine bases?

Answer 18

Thymine and Cytosine

Question 19

Is the sugar-phosphate backbone hydrophobic or hydrophilic?

Answer 19

Hydrophilic

Question 20

What is the significance of complementary base pairing?

Answer 20

It ensures that mistakes are not made when copying or transcribing DNA