Transcription

Question 1

How does RNA differ from DNA

Answer 1

• single stranded
• ribose instead of deoxyribose
• uracil instead of thymine

Question 2

Three phases of transcription

Answer 2

Initiation, Elongation, Termination

Question 3

Initiation in transcription

Answer 3

• RNA polymerase recognises and binds to a promoter sequence
• RNA binds to promoter initiation site
• This tells where to start and what to transcribe

Question 4

Elongation in transcription

Answer 4

• RNA p elongates the RNA molecule = antiparallel to template
• complimentary base
• substrates hydrolysed releasing energy

Question 5

What substrates are hydrolysed in elongation to release energy

Answer 5

ribonucleoside triphosphates

Question 6

Termination in transcription

Answer 6

• transcript is released
• pre-mRNA (primary transcript) is processed to generate mature mRNA