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EDEXCEL MERGED QUESTION PAPER AND MARK SCHEME 2025 Pearson Edexcel A Level GCEIn Biology A Salters - Nuffield (9BN0) Paper 2: Energy, Exercise and Co-ordination

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EDEXCEL MERGED QUESTION PAPER AND MARK SCHEME 2025 Pearson Edexcel A Level GCEIn Biology A Salters - Nuffield (9BN0) Paper 2: Energy, Exercise and Co-ordination

Institution
Biology
Course
Biology

Content preview

Please check the examination details below before entering your candidate information
Candidate surname Other names


Centre Number Candidate Number




Pearson Edexcel Level 3 GCE
Friday 13 June 2025
Morning (Time: 2 hours) Paper
reference 9BN0/02
Biology A (Salters Nuffield)  


Advanced
PAPER 2: Energy, Exercise and Coordination

You must have: Total Marks
Scientific calculator, pencil, ruler

, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an




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answer, put a line through the box and then mark your new answer with a cross .
1 The pancreas is an organ found in the human body.
The pancreas is made up of a number of different cell types including beta cells and
acinar cells.
(a) The diagram shows a beta cell from a human pancreas.



pair of centrioles




rough endoplasmic reticulum
(rER) of width 20 nm




(i) Calculate the magnification of this diagram.
(2)




Answer ......................... ............... . . . . . . . . . . . . . . . . . . . . . .
2
*P78658A0232* 

, (ii) A student viewed the diagram and stated that the cell was
undergoing mitosis.
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Give two reasons why this statement is correct.
(2)

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(b) Acinar cells produce the digestive enzyme elastase. Elastase is secreted from the
acinar cells as a glycoprotein.
The polypeptide chain for elastase is formed on the ribosomes of the rER.
Describe how this polypeptide is processed to form a glycoprotein and then
released from the cell.
(4)

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(Total for Question 1 = 8 marks)


3
 *P78658A0332* Turn over

, 2 A spirometer can produce a trace used to study breathing.
(a) When using a spirometer, the same air is repeatedly inhaled and exhaled. Before




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the air is inhaled from the spirometer, it passes through soda lime to remove
carbon dioxide.
Explain the effect on breathing if the inhaled air is not passed through soda lime.
(3)

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4



*P78658A0432* 

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Institution
Biology
Course
Biology

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