Key Area 3: DNA and the production of proteins

Question 1

DNA

Answer 1

Is a double stranded helix held by complementary base pairs. It carries the genetic information for making proteins

Question 2

Double helix

Answer 2

Held by complementary base pairs?

Question 3

Complementary

Answer 3

A double stranded helix is help together by complementary base pairs

Question 4

Base pairs

Answer 4

Adenine, Cytosine, Guanine, Thymine

Question 5

Adenine pairs?

Answer 5

Thymine

Question 6

Thymine pairs?

Answer 6

Adenine

Question 7

Cytosine pairs?

Answer 7

Guanine

Question 8

Guanine pairs?

Answer 8

Cytaoine

Question 9

Base sequence

Answer 9

6 steps

Question 10

Amino acid

Answer 10

Fundamental molecules that make up proteins

Question 11

Gene

Answer 11

a region of DNA that codes for the sequence of amino acids in a protein

Question 12

messenger RNA (mRNA)

Answer 12

Is a molecule which carries a complementary copy of the genetic code from the DNA in the nucleus to a ribosome where the proteins is assembled from amino acids.

Question 13

The sequence of DNA bases contains the

Answer 13

genetic instructions that control inherited characteristics

Question 14

A gene is

Answer 14

a region of DNA that codes for the sequence of amino acids in a protein

Question 15

The sequence of amino acids in a protein determines

Answer 15

the structure and function of that protein

Question 16

mRNA travels…

Answer 16

The gene from the DNA molecule is copied by messenger RNA (mRNA) in the nucleus.

mRNA leaves the nucleus, carrying the complementary copy of the genetic code

mRNA travels to the ribosome, which is the site of protein synthesis.

At the ribosome, amino acid sub-units are assembled to synthesise a protein.

A protein molecule is synthesised. The order of DNA bases determines the order of amino acids in a protein.