Exam (elaborations)
AqA A-level BIOLOGY Paper 1 June 2023
AqA A-level BIOLOGY Paper 1 June 2023
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AqAA-level
BIOLOGY
Paper 1
Materials
For this paper you must have:
a ruler with millimetre measurements
a scientific calculator.
Instructions
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page.
Answer all questions.
You must answer the questions in the spaces provided. Do not write
outside the box around each page or on blank pages.
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).
Show all your working.
Do all rough work in this book. Cross through any work you do not want
to be marked.
Information
The marks for the questions are shown in brackets.
The maximum mark for this paper is 91.
7402/1
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Give the three structural features found in all virus particles and describe the function
of one of these features.
[2 marks]
1
2
3
Function of one named feature
0 1 . 2 Explain why viruses are described as acellular and non-living.
[2 marks]
0 1 . 3 Give one reason why antibiotics are not effective against viruses.
[1 mark]
5
, 3
Do not write
outside the
0 2 . 1 Chitin is a polysaccharide. The chitin monomer is a β-glucose molecule with one OH box
group replaced by an NHCOCH3 group. NHCOCH3 can be represented by N(Ac).
Figure 1 shows the monomer that forms chitin and the chitin polymer.
Figure 1
Chitin has a similar structure to cellulose.
Use Figure 1 to describe three ways the structure of chitin is similar to the structure
of cellulose.
[3 marks]
1
2
3
Question 2 continues on the next page
Turn over ►
, 4
Do not write
outside the
box
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