DNA Structure and Replication (Biology 012)

Question 1

What are the four nitrogenous bases of DNA

Answer 1

Adenine, Thymine, Guanine, Cytosine

Question 2

How many hydrogen bonds are between A and T

Answer 2

2

Question 3

How many hydrogen bonds are between G and C

Answer 3

3

Question 4

What is the structure of nucleotides

Answer 4

Nitrogenous base, sugar and phosphate

Question 5

What is a gene

Answer 5

A section of DNA that codes for a particular protein

Question 6

During mitosis, what must every daughter cell have

Answer 6

Each daughter cell must have a complete copy of the genetic code

Question 7

What is DNA replication

Answer 7

When DNA is copied

Question 8

What is the purpose of helicase

Answer 8

Helicases unwind the DNA strand, breaking down the hydrogen bonds creating two separate possible template strands

Question 9

What is the purpose of topoisomerase

Answer 9

To relieve the strain ahead of the replication fork, rejoining DNA strands that have been broken

Question 10

What is the purpose of primase

Answer 10

Synthesizes RNA primers and pairing with their complementary bases to the template strand

Question 11

What is the purpose of DNA polymerase

Answer 11

Synthesizes new DNA that is added to the pre-existing DNA chain

Question 12

What is the purpose of DNA ligase

Answer 12

Joins the sugar-phosphate backbones together