Paper2 biology
Please check the examination details below before entering your candidate information
Candidate surnameOther names
Centre Number Candidate Number
Pearson Edexcel GCE
Thursday 22 May 2025
Morning (Time: 1 hour 30 minutes) Paper
reference 8BI0/02
Biology B 🟐 🟐
Advanced Subsidiary
PAPER 2: Core Physiology and Ecology
You must have: Total Marks
Scientific calculator, HB pencil, ruler
Instructions
• Use black ink or ball-point pen.
• Fill in the boxes at the top of this page with
centre number and candidate number.
• provided – there may be more space
• Answer
your all
name,
Answer the questions in the spaces
questions.
than you need.
Information
• The total mark for this paper is 80.
• The marks for each question are shown in
– 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
brackets
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.
• Try to answer every
• Check your answers if you have time at the end.
question.
Turn over
P78690A
©2025 Pearson Education Ltd.
Y:1/1/1/1/1/
Paper2 biology
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you
AREA
DO NOT WRITE IN THIS
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
AREA
DO NOT WRITE IN THIS
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 (1)
integral protein?
AREA
DO NOT WRITE IN THIS
A Q
B R
C S
D U
2
■■■
■
, (iii) Which structure allows water molecules into the cell?
(1)
A P
DO NOT WRITE IN THIS
B Q
C T
D V
(b) Explain how the properties of oxygen and of sodium ions
AREA
determine how they enter a cell.
(4)
Oxygen
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
DO NOT WRITE IN THIS
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
Sodium ions
AREA
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
DO NOT WRITE IN THIS
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
(Total for Question 1 = 7 marks)
AREA
3
■■■ Turn
■ over
, 2 (a) The photograph shows a section through an artery and a vein, as
seen using a light microscope.
AREA
DO NOT WRITE IN THIS
Y
X
(Source: © BIOPHOTO ASSOCIATES/SCIENCE PHOTO LIBRARY)
AREA
DO NOT WRITE IN THIS
(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
AREA
vein shown in the photograph. DO NOT WRITE IN THIS
(2)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
4
■■■
■
Please check the examination details below before entering your candidate information
Candidate surnameOther names
Centre Number Candidate Number
Pearson Edexcel GCE
Thursday 22 May 2025
Morning (Time: 1 hour 30 minutes) Paper
reference 8BI0/02
Biology B 🟐 🟐
Advanced Subsidiary
PAPER 2: Core Physiology and Ecology
You must have: Total Marks
Scientific calculator, HB pencil, ruler
Instructions
• Use black ink or ball-point pen.
• Fill in the boxes at the top of this page with
centre number and candidate number.
• provided – there may be more space
• Answer
your all
name,
Answer the questions in the spaces
questions.
than you need.
Information
• The total mark for this paper is 80.
• The marks for each question are shown in
– 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
brackets
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.
• Try to answer every
• Check your answers if you have time at the end.
question.
Turn over
P78690A
©2025 Pearson Education Ltd.
Y:1/1/1/1/1/
Paper2 biology
, Answer ALL questions.
Some questions must be answered with a cross in a box . If you
AREA
DO NOT WRITE IN THIS
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
AREA
DO NOT WRITE IN THIS
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 (1)
integral protein?
AREA
DO NOT WRITE IN THIS
A Q
B R
C S
D U
2
■■■
■
, (iii) Which structure allows water molecules into the cell?
(1)
A P
DO NOT WRITE IN THIS
B Q
C T
D V
(b) Explain how the properties of oxygen and of sodium ions
AREA
determine how they enter a cell.
(4)
Oxygen
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
DO NOT WRITE IN THIS
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
Sodium ions
AREA
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
DO NOT WRITE IN THIS
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
(Total for Question 1 = 7 marks)
AREA
3
■■■ Turn
■ over
, 2 (a) The photograph shows a section through an artery and a vein, as
seen using a light microscope.
AREA
DO NOT WRITE IN THIS
Y
X
(Source: © BIOPHOTO ASSOCIATES/SCIENCE PHOTO LIBRARY)
AREA
DO NOT WRITE IN THIS
(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
AREA
vein shown in the photograph. DO NOT WRITE IN THIS
(2)
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
............................................................................................................................... ............................................................................................................................... ......................
4
■■■
■
