The structure of DNA

Question 1

What is DNA

Answer 1

a long complex molecule which carries genetic information for making proteins

Question 2

Where is DNA

Answer 2

DNA is coiled into thread like structures called chromosomes
These structure are found in the nucleus of cells

Question 3

Describe the structure of dna

Answer 3

Double stranded helix held together by complementary base pairs

Question 4

Name the 4 different bases

Answer 4

Guanine
Cytosine
Adenine
Thymine

Question 5

name the complementary base pair for Adenine

Answer 5

Thymine

Question 6

name the complementary base pair for guanine

Answer 6

Cytosine

Question 7

If there are 600 adenine how many thymine will there be

Answer 7

600 as there is always the same amounts

Question 8

What are genes

Answer 8

a gene is a smal section of dna which carries code to produce one single protein

Question 9

what are proteins

Answer 9

complex molecules made up of amino acids

Question 10

where does protein synthesis take place

Answer 10

ribosome

Question 11

what is a messenger RNA ( mRNA)

Answer 11

a molecule which carries a complimentary copy of genetic code from dna in the nucleus to a ribsome where the protein is assembled from amino acids

Question 12

Describe the stages of mRNA

Answer 12

Dna uncoils and the two strands separate
a complimentary copy of the gene is made this is called a mRNA
mRNA leaves the nucleus through a pore and travels to a ribosome
The ribosome reads three bases at a time
the ribosome continues to read the mRNS until a polypeptide chain is formed

Question 13

how many bases code for one amino acid

Answer 13

3 a triplet