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2025 Pearson Edexcel Advanced Subsidiary GCE In Biology B (8BI0) Paper 02: Core Physiology and Ecology ACTUAL QUESTION PAPER AND MARKING SCHEME (MERGED)

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2025 Pearson Edexcel Advanced Subsidiary GCE In Biology B (8BI0) Paper 02: Core Physiology and Ecology ACTUAL QUESTION PAPER AND MARKING SCHEME (MERGED)

Institution
PEARSON EDEXCEL
Course
PEARSON EDEXCEL

Content preview

Candidate surname Other names


Centre Number Candidate Number




Paper


B � �


Advanced Subsidiary
PAPER 2: Core Physiology and Ecology

Marks
Scientific calculator, HB pencil, ruler



Instructions

• Use black ink or ball‑point pen.
centre number and candidate number.

Answer the questions in the spaces provided
– there may be more space than you need.

Information

• The total mark for this paper is 80.
– use this as a guide as to how much time to spend on each question.
In question(s) marked with an asterisk (*), marks will be awarded for your ability to
structure your answer logically, showing how the points that you make are related or
follow from each other where appropriate.

Advice
• Read each question carefully before you start to answer it.
• Check your answers if you have time at the end.
Turn over

, Answer ALL questions.

Some questions must be answered with a cross in a box . If you change your mind about an
answer, put a line through the box and then mark your new answer with a cross .

1 The cell surface membrane controls transport into and out of the cell.

(a) The diagram shows a cell surface membrane with some structures labelled.

carbohydrate chain
P Q




R




S
V U T

(i) Which of the following labelled structures is cholesterol?
(1)
A P
B Q
C S
D V


(ii) Which of the following labelled structures is an integral protein?
(1)
A Q
B R
C S
D U




2
■■■■

, (iii) Which structure allows water molecules into the cell?
(1)
A P
B Q
C T
D V


(b) Explain how the properties of oxygen and of sodium ions determine how they
enter a cell.
(4)
Oxygen

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Sodium ions

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(Total for Question 1 = 7 marks)




3
■■■■ Turn over

, 2 (a) The photograph shows a section through an artery and a vein, as seen using a
light microscope.




Y

X




(Source: © BIOPHOTO ASSOCIATES/SCIENCE PHOTO LIBRARY)

(i) The actual diameter of the artery measured from X to Y is 1.2mm.
Calculate the magnification of this photograph.
(1)




Answer . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .



(ii) Explain how two features of that artery distinguish it from the vein shown in
the photograph.
(2)

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4
■■■■

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Institution
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Uploaded on
October 9, 2025
Number of pages
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Written in
2025/2026
Type
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