DNA, Genes And Chromosomes

Question 0

How many chromosomes in total does a human cell nucleus contain?

Answer 0

46 chromosomes

Question 1

What is the name we give to human body cells?

Answer 1

Diploid - they have two copies of each chromosome arranged in pairs.

Question 2

What are genes?

Answer 2

Chemical instructions

Question 3

What is DNA?

Answer 3

A long list of instruction on how to put an organism together and make it work.

Question 4

Why are proteins important in genes?

Answer 4

• they control most processes in the body

- they determine inherited characteristics e.g. Eye colour and blood type.

Question 5

What is the structure of DNA?

Answer 5

A DNA molecule has two strands coiled together in the shape of a double helix (two spirals).

Question 6

What is the name of the chemical that holds the two strands if the DNA molecule together?

Answer 6

Bases.

Question 7

What are the four different kinds of bases called?

Answer 7

Adenine (A), cytosine (C), guanine (G), thymine (T)

Question 8

Which bases are always paired together?

Answer 8

A-T and C-G. This is complimentary base-pairing.

Question 9

What type of acid is DNA?

Answer 9

Nucleic acid.