Ch.10

Question 1

Purines

Answer 1

Adenine (A) and Guanine (G)

Question 2

•Pyimidines

Answer 2

Thymine,(T) and Cytosine (C)

Question 3

Nucleotide consist of

Answer 3

–A nitrogenous base (purines and pyrimidines).
–Deoxyribose sugar
–Phosphate group

Question 4

DNA replication

Answer 4

one ds DNA molecule is converted to two identical ‘daughter’ molecules.

Question 5

REPLICATION FORK

Answer 5

Point at which replication occurs

Question 6

Prokaryotes

Answer 6

One origin of replication

Question 7

Eukaryotes

Answer 7

Many origins of replication

Question 8

Origin of replication

Answer 8

Site where DNA replication begins

Question 9

DNA structure

Answer 9

• DNA structure is a double helix with a sugar-phosphate backbone and a base attached to each sugar in the backbone.
• The two strands are held together by hydrogen bonds between the bases . A–T and G–C

polymers of monomers called nucleotides