DNA

Question 1

What’s DNA?

Answer 1

Contains genetic information needed for development and functioning of an organism.

Question 2

What bonds hold the polynucleotide chains together?

Answer 2

Hydrogen bonds

Question 3

What’s the structure of DNA?

Answer 3

Double helix = two antiparallel polynucleotide chains twist

Question 4

What’s DNA helicase?

Answer 4

Enzyme catalyses the breaking of H bonds between the complementary organic bases in DNA.

Question 5

What’s DNA polymerase?

Answer 5

Enzyme that catalyses the synthesis of DNA by joining adjacent nucleotides, using single-stranded DNA as a template.

Question 6

Step 1 of DNA replication:

Answer 6

Original DNA molecule unwinds + hydrogen bonds are broke.

Question 8

Step 2 of DNA replication:

Answer 8

2 DNA strands separate due to helicase.

Question 9

Step 3 of DNA replication:

Answer 9

Free nucleotides are attracted to their complementary base pairs.

Question 10

Step 4 of DNA replication:

Answer 10

Strong sugar phosphate back bone is re-joined by DNA polymerase.