RNA and Transcription

Question 1

genetic information is expressed in the form of proteins by a 2 stage process:

Answer 1

1) transcription
2) translation

Question 2

what is the function transcription?

Answer 2

generates a single -stranded rna identical in sequence with one of the strands of the dna duplex

Question 3

what is the function translation?

Answer 3

converts the rna sequence into the amino acid sequence comprising a protein

Question 4

how does rna differ from dna?

Answer 4

rna:
ribose sugar
uracil (less stable than t, which is useful for shorter lived rna)

dna:
deoxyribose sugar
thymine

Question 5

describe transcription

Answer 5

involves formation of complementary bp of rna using antisense dna template

carried out by rna polymerase enzymes

Question 6

what is rna polymerase?

Answer 6

multi-unit enzymes which synthesise new rna from dna templates

Question 7

what are the 3 rna polymerases in eukaryotes?

Answer 7

1) rna polymerase I
2) rna polymerase II
3) rna polymerase III