AQA A-LEVEL BIOLOGY PAPER 1: 7402/1 JUNE BIOLOGY A LEVEL, 2025/2026 QP

AQA A-LEVEL BIOLOGY PAPER 1: 7402/1 JUNE
BIOLOGY A LEVEL, 2025/2026
QP

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Answer all questions in the spaces box
provided.

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




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0 2 . 1 Chitin is a polysaccharide. The chitin monomer is a β-glucose molecule box

with one OH 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




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