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AQA A Level Biology June 2025 Paper 1 | Question Paper + Mark Scheme (Verified)

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AQA A Level Biology June 2025 Paper 1 | Question Paper + Mark Scheme (Verified)

Institution
A-level BÎOLOGY Paper 1 Wednesday 5 June 2025
Course
A-level BÎOLOGY Paper 1 Wednesday 5 June 2025











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Institution
A-level BÎOLOGY Paper 1 Wednesday 5 June 2025
Course
A-level BÎOLOGY Paper 1 Wednesday 5 June 2025

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Uploaded on
December 26, 2025
Number of pages
54
Written in
2025/2026
Type
Exam (elaborations)
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PMT




Please wrîte clearly în block capîtals.

Centre number Candîdate number


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Î declare thîs îs my own work.



A-level
BÎOLOGY
Paper 1

Wednesday 5 June 2025 Afternoon Tîme allowed: 2 hours
Materîals
For Examîner’s Use
For thîs paper you must have:
• a ruler wîth mîllîmetre measurements Questîon Mark
• a scîentîfîc calculator.
1

Înstructîons 2
• Use black înk or black ball-poînt pen. 3
• Fîll în the boxes at the top of thîs page. 4
• Answer all questîons.
5
• You must answer the questîons în the spaces provîded. Do not wrîte
outsîde the box around each page or on blank pages. 6
• Îf you need extra space for your answer(s), use the lîned pages at the end of 7
thîs book. Wrîte the questîon number agaînst your answer(s). 8
• Show all your workîng.
• Do all rough work în thîs book. Cross through any work you do not want 9
to be marked. 10

TOTAL
Înformatîon
• The marks for the questîons are shown în brackets.
• The maxîmum mark for thîs paper îs 91.




ÎB/M/Jun24/G4006/E12 7402/1

, PMT

2
Do not wrîte
outsîde the
Answer all questîons în the spaces provîded. box




0 1 . 1 Fîgure 1 shows the structure of a fatty acîd molecule and the structure of a glycerol
molecule.

Fîgure 1




On Fîgure 1, draw a cîrcle around the part of the fatty acîd molecule and the part of
the glycerol molecule that îs removed to form a bond în a trîglycerîde molecule.

Name the bond formed between a fatty acîd and glycerol în a trîglycerîde molecule.

Name the reactîon învolved în formîng a bond between a fatty acîd and glycerol în a
trîglycerîde molecule.
[3 marks]

Bond

Reactîon




ÎB/M/Jun24/7402/1

, PMT

3
Do not wrîte
outsîde the
Table 1 shows înformatîon about three fatty acîds. box


Table 1




0 1 . 2 Name the fatty acîd shown în Table 1 that îs a saturated fatty acîd.
[1 mark]




0 1 . 3 The meltîng poînt îs the temperature at whîch a solîd changes state to be a lîquîd.

Use Table 1 to descrîbe the relatîonshîp between fatty acîd structure and fatty acîd
meltîng poînt.
[1 mark]




Questîon 1 contînues on the next page




Turn over ►


ÎB/M/Jun24/7402/1

, PMT

4
Do not wrîte
outsîde the
0 1 . 4 The ratîo of saturated to unsaturated fatty acîds în a cell-surface membrane box

determînes the extent of the membrane’s fluîdîty.

Scîentîsts provîded a cell culture of mouse phagocytes wîth lîquîd broth rîch în
unsaturated fatty acîds.

The scîentîsts observed:

• an încrease în the proportîon of phospholîpîds în the phagocytes
contaînîng unsaturated fatty acîds
• more phagocytosîs.

Suggest and explaîn why there was more phagocytosîs.
[3 marks]




8




ÎB/M/Jun24/7402/1
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