Chp 6-DNA

Question 1

DNA is the basis of ——-

Answer 1

Inheritance

Question 2

What does DNA determine ?

Answer 2

Our identity and relationships with others

Question 3

DNA is a molecule that determines the—– and—-of living things

Answer 3

the shape and structure

Question 4

The building blocks of DNA are called…..

Answer 4

Nucleotides

Question 5

Nucleotides are made of three parts. What are they ?

Answer 5

A phosphate, a sugar and a base

Question 6

What are the types of bases ? And which sticks to which?

Answer 6

Adenine-Thymine,Cytosine-Guanine

Question 7

What is the phosphate and the sugar of a DNA called ?

Answer 7

The backbone

Question 8

How is a DNA molecule formed ?

Answer 8

The phosphate and the sugar of a nucleotide jon with other nucleotides and form long chains. Two of these chains form a DNA molecule held by bases.

Question 9

How does DNA replication happen ?

Answer 9

1-Helicase enzymes unzip and unwind the strand of DNA and break through the hydrogen bonds
2-Polymerase enzymes build up the DNA from 5’ to 3’ direction
3-Primase helps Polymerase to get started
4-Finally Ligase helps to glue the okazaki fragments

Question 10

Which stage does DNA replication happen in ?

Answer 10

Interphase