Candidate signature
I declare this is my own work.
AS
BIOLOGY
Paper 2
Time allowed: 1 hour 30 minutes
Materials
For this paper you must have: For Examiner’s Use
• a ruler with millimetre measurements
Question Mark
• a scientific calculator.
1
Instructions 2
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page.
4
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write 5
outside the box around each page or on blank pages. 6
• If you need extra space for your answer(s), use the lined pages at the end of
7
this book. Write the question number against your answer(s).
• Show all your working. 8
• Do all rough work in this book. Cross through any work you do not want 9
to be marked.
TOTAL
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 75.
*JUN227401201*
IB/M/Jun22/E9 7401/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 What is a gene?
[1 mark]
0 1 . 2 Describe how the production of messenger RNA (mRNA) in a eukaryote cell is
different from the production of mRNA in a prokaryote cell.
[2 marks]
0 1 . 3 Scientists produced a short, single-stranded, artificial nucleic acid, called PNA. The
PNA binds to a small section of DNA.
The scientists introduced PNA into cells and discovered that these cells produced
less mRNA than cells that did not contain PNA.
Suggest how PNA affected the transcription of the section of DNA.
[2 marks]
*02*
IB/M/Jun22/7401/2
, 3
Do not write
outside the
0 1 . 4 Describe the role of ATP in the process of translation in protein synthesis. box
[2 marks]
7
Turn over for the next question
Turn over ►
*03*
IB/M/Jun22/7401/2
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