2025
2025 PEARSON EDEXCEL ADVANCED
SUBSIDIARY GCE IN BIOLOGY B (8BI0) PAPER
PEARSON 02: CORE PHYSIOLOGY AND ECOLOGY
ACTUAL QUESTION PAPER AND
MARKING SCHEME (MERGED)
[Type the document subtitle] | PEARSON
, surname names
Number Number
Morning (Time: 1 hour 30 minutes) Paper
B
� �
Advanced Subsidiary
PAPER 1: Core Cellular Biology and Microbiology
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 on 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
, 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 Some carbohydrates are composed of three monosaccharides. These are called
trisaccharides.
Raffinose is a trisaccharide composed of glucose, galactose and fructose.
(a) Complete the diagram to show the structure of an alpha glucose molecule.
(2)
CH2OH
C O
H
C C
C C
(b) Name the bond that joins monosaccharides together.
(1)
. . . . . . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . . . . . . .. . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . .. . . . . . ...... .. .. ... .. ... .. ..
(c) The three monosaccharides present in raffinose each have a molecular mass of 180.
The relative atomic mass of the element hydrogen is 1 and the relative atomic mass of the
element oxygen is 16.
Calculate the molecular mass of raffinose.
(1)
Answer ..............................................................
(Total for Question 1 = 4 marks)
2
■■■■
, 2 During the S phase of the cell cycle, DNA is synthesised by semi-
conservative replication.
The diagram shows part of a DNA molecule.
bases J and K
bases L and M
bond E
bond D bond F
(a) (i) Name the base pairs labelled J and K, L and M.
(2)
J and K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
L and M ......... ... ... .... ... .... ... .... ... .... ... ... .... ... .... ... .... ... ... .... ... .... ... .... ... ... .... ... .... ... .... ... .. ... .. ... .. ............................................................................................................................. .
(1) Name the bonds labelled D, E and F.
(2)
Bond D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bond E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
Bond F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
2025 PEARSON EDEXCEL ADVANCED
SUBSIDIARY GCE IN BIOLOGY B (8BI0) PAPER
PEARSON 02: CORE PHYSIOLOGY AND ECOLOGY
ACTUAL QUESTION PAPER AND
MARKING SCHEME (MERGED)
[Type the document subtitle] | PEARSON
, surname names
Number Number
Morning (Time: 1 hour 30 minutes) Paper
B
� �
Advanced Subsidiary
PAPER 1: Core Cellular Biology and Microbiology
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 on 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
, 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 Some carbohydrates are composed of three monosaccharides. These are called
trisaccharides.
Raffinose is a trisaccharide composed of glucose, galactose and fructose.
(a) Complete the diagram to show the structure of an alpha glucose molecule.
(2)
CH2OH
C O
H
C C
C C
(b) Name the bond that joins monosaccharides together.
(1)
. . . . . . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . . . . . . .. . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . .. . . . . . . . . . . .. . . . . . ...... .. .. ... .. ... .. ..
(c) The three monosaccharides present in raffinose each have a molecular mass of 180.
The relative atomic mass of the element hydrogen is 1 and the relative atomic mass of the
element oxygen is 16.
Calculate the molecular mass of raffinose.
(1)
Answer ..............................................................
(Total for Question 1 = 4 marks)
2
■■■■
, 2 During the S phase of the cell cycle, DNA is synthesised by semi-
conservative replication.
The diagram shows part of a DNA molecule.
bases J and K
bases L and M
bond E
bond D bond F
(a) (i) Name the base pairs labelled J and K, L and M.
(2)
J and K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
L and M ......... ... ... .... ... .... ... .... ... .... ... ... .... ... .... ... .... ... ... .... ... .... ... .... ... ... .... ... .... ... .... ... .. ... .. ... .. ............................................................................................................................. .
(1) Name the bonds labelled D, E and F.
(2)
Bond D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bond E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
Bond F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
