2025 Pearson Edexcel Level 3 GCE Biology A {Salters Nuffield} Advanced PAPER 2: Energy, Exercise and Coordination
Combined Question Paper and Marking Scheme
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
Instructions
• Use black ink or ball-point pen.
• centrethenumber
Fill in boxes at the top of this page with your name,
and candidate number.
•• Show
Answer all questions.
your working in any calculation questions and include units in your
answer where appropriate.
• Answer the questions in the spaces provided
– there may be more space than you need.
Information
• The total mark for this paper is 100.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• You may use a scientific calculator.
• Instructure
question(s) marked with an asterisk (*), marks will be awarded for your ability to
your answer logically showing how the points that you make are related or
follow on from each other where appropriate.
Advice
• Read each question carefully before you start to answer it.
• Try to answer every question.
• Check your answers if you have time at the end. Turn over
P78658A
©2025 Pearson Education Ltd.
Y:1/1/1/1/
, 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
DO NOT WRITE IN THIS AREA
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
DO NOT WRITE IN THIS AREA
rough endoplasmic reticulum
(rER) of width 20 nm
(i) Calculate the magnification of this diagram.
(2)
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Answer ..............................................................
2
, (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)
1 ............................................................................................................................... ............................................................................................................................... .................
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2 ............................................................................................................................... ............................................................................................................................... .................
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(b) Acinar cells produce the digestive enzyme elastase. Elastase is secreted from the
acinar cells as a glycoprotein.
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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
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
DO NOT WRITE IN THIS AREA
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
Combined Question Paper and Marking Scheme
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
Instructions
• Use black ink or ball-point pen.
• centrethenumber
Fill in boxes at the top of this page with your name,
and candidate number.
•• Show
Answer all questions.
your working in any calculation questions and include units in your
answer where appropriate.
• Answer the questions in the spaces provided
– there may be more space than you need.
Information
• The total mark for this paper is 100.
• The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• You may use a scientific calculator.
• Instructure
question(s) marked with an asterisk (*), marks will be awarded for your ability to
your answer logically showing how the points that you make are related or
follow on from each other where appropriate.
Advice
• Read each question carefully before you start to answer it.
• Try to answer every question.
• Check your answers if you have time at the end. Turn over
P78658A
©2025 Pearson Education Ltd.
Y:1/1/1/1/
, 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
DO NOT WRITE IN THIS AREA
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
DO NOT WRITE IN THIS AREA
rough endoplasmic reticulum
(rER) of width 20 nm
(i) Calculate the magnification of this diagram.
(2)
DO NOT WRITE IN THIS AREA
Answer ..............................................................
2
, (ii) A student viewed the diagram and stated that the cell was
undergoing mitosis.
DO NOT WRITE IN THIS AREA
Give two reasons why this statement is correct.
(2)
1 ............................................................................................................................... ............................................................................................................................... .................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
2 ............................................................................................................................... ............................................................................................................................... .................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
(b) Acinar cells produce the digestive enzyme elastase. Elastase is secreted from the
acinar cells as a glycoprotein.
DO NOT WRITE IN THIS AREA
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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DO NOT WRITE IN THIS AREA
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(Total for Question 1 = 8 marks)
3
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
DO NOT WRITE IN THIS AREA
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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