Please write clearly in block capitals.
Centre Candidate
number number
Surname
Forename(s)
Candidate re
signatu
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
Questio Mark
a scientific calculator. n
1
Instructions
2
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page. 3
Answer all questions. 4
You must answer the questions in the spaces provided. Do 5
not write outside the box around each page or on blank
6
pages.
7
If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). 8
Show all your working. 9
Do all rough work in this book. Cross through any work you do
not want to be marked. TOTAL
Information
The marks for the questions are shown in brackets.
The maximum mark for this paper is 75.
IB/M/Jun22/ 7401/2
E9
, 2
Do not write
outside the
Answer all questions in the spaces box
provided.
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 box
synthesis. [2
marks]
7
Turn over for the next question
*03
IB/M/
* Jun22/7401/2
, 4
Do not write
outside the
Turn over ►
*03
IB/M/
* Jun22/7401/2
Centre Candidate
number number
Surname
Forename(s)
Candidate re
signatu
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
Questio Mark
a scientific calculator. n
1
Instructions
2
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page. 3
Answer all questions. 4
You must answer the questions in the spaces provided. Do 5
not write outside the box around each page or on blank
6
pages.
7
If you need extra space for your answer(s), use the lined pages at the end of
this book. Write the question number against your answer(s). 8
Show all your working. 9
Do all rough work in this book. Cross through any work you do
not want to be marked. TOTAL
Information
The marks for the questions are shown in brackets.
The maximum mark for this paper is 75.
IB/M/Jun22/ 7401/2
E9
, 2
Do not write
outside the
Answer all questions in the spaces box
provided.
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 box
synthesis. [2
marks]
7
Turn over for the next question
*03
IB/M/
* Jun22/7401/2
, 4
Do not write
outside the
Turn over ►
*03
IB/M/
* Jun22/7401/2
