topic 4 - genetic information + variation

Question 1

what are the bases called in DNA

Answer 1

purine bases
adenine, guanine, thymine and cytosine

Question 2

what are the bases called in RNA

Answer 2

pyrimidine bases
adenine, guanine, uracil, cytosine

Question 3

what is the genetic code

Answer 3

order of bases on DNA

Question 4

what is a codon

Answer 4

a specific triplet of bases that codes for an amino acid

Question 5

what is a gene

Answer 5

sequence of bases on a DNA molecule coding for a sequence of amino acids in a polypeptide chain

Question 6

what is a locus

Answer 6

location of a gene

Question 7

what are introns and exons

Answer 7

introns- non-coding sections of DNA
exons- coding regions