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#O C R AS Level Biology A H020/01 Breadth in biology May 2023
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#O C R AS Level Biology A H020/01 Breadth in biology May 2023
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#O C RAS Level Biology A
H020/01 Breadth in biology
May 2023
Time allowed: 1 hour 30 minutes
You can use:
a scientific or graphical calculator
a ruler (cm/mm)
*
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.
INFORMATION
• The total mark for this paper is 70.
• The marks for each question are shown in brackets [ ].
• This document has 28 pages.
ADVICE
• Read each question carefully before you start your answer.
2023
,Turn over
, 2
Section A
You should spend a maximum of 25 minutes on this section.
Write your answer for each question in the box provided.
1 Which statement describes a problem that has resulted from the increased use of antibiotics?
A Penicillin can no longer be used to treat infections.
B Rates of MRSA infection have increased.
C Some bacteria and fungi have evolved resistance to antibiotics.
D Viral infections can no longer be treated with antibiotics.
Your answer [1]
2 The diagram shows a computer model of the structure of an antibody.
A B
C
Constant region
D
Which part of the antibody, A, B, C or D, is an antigen-binding site?
Your answer [1]
2023
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