Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Monday 12 May 2025
reference 8BN0/01
Biology A (Salters Nuffield)
Subsidiary
Total Marks
Scientific calculator, HB pencil, ruler
Instructions
• Use black ink or ball‑point pen.
centre number and candidate number.
• Show all your working out in calculations and include units 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 80.
– use this as a guide as to how much time to spend on each question.
You may use a scientific calculator.
In questions 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
, 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
answer, put a line through the box and then mark your new answer with a cross .
1 DNA and RNA are nucleic acids.
(a) (i) Which base is present in RNA but absent from DNA?
(1)
A adenine
B guanine
C thymine
D uracil
(ii) Which row shows the correct structure of these two molecules?
(1)
DNA RNA
A double‑stranded double‑stranded
B double‑stranded single‑stranded
C single‑stranded double‑stranded
D
single‑stranded single‑stranded
(b) DNA acts as a template for the synthesis of messenger RNA.
(i) Which bond joins together mononucleotides in a strand of DNA and
(1)
RNA?
A disulfide
B glycosidic
C peptide
D phosphodiester
■■■■
2
, (ii) Give three differences between the process of DNA replication and the
process of DNA transcription.
(3)
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......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... .. ..... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
2 ......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. .................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... .. .... ....... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... ......................
3 ......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... . ...... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... .................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... .. ..... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
(Total for Question 1 = 6 marks)
3
■■■■ Turn over
, 2 The diagram shows some components of a cell membrane.
ion
P
Q
R
ATP ADP
S
T
glucose molecule
(a) The components labelled P and T are proteins.
(i) State one role of ATP in the movement of molecules through the component
labelled T.
(1)
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... .. .... ....... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... ......................
(ii) Describe how ions enter the cell through the component labelled P.
(2)
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... .. .... ....... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... .... ... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... .. ..... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
4
■■■■
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel Level 3 GCE
Monday 12 May 2025
reference 8BN0/01
Biology A (Salters Nuffield)
Subsidiary
Total Marks
Scientific calculator, HB pencil, ruler
Instructions
• Use black ink or ball‑point pen.
centre number and candidate number.
• Show all your working out in calculations and include units 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 80.
– use this as a guide as to how much time to spend on each question.
You may use a scientific calculator.
In questions 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
, 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
answer, put a line through the box and then mark your new answer with a cross .
1 DNA and RNA are nucleic acids.
(a) (i) Which base is present in RNA but absent from DNA?
(1)
A adenine
B guanine
C thymine
D uracil
(ii) Which row shows the correct structure of these two molecules?
(1)
DNA RNA
A double‑stranded double‑stranded
B double‑stranded single‑stranded
C single‑stranded double‑stranded
D
single‑stranded single‑stranded
(b) DNA acts as a template for the synthesis of messenger RNA.
(i) Which bond joins together mononucleotides in a strand of DNA and
(1)
RNA?
A disulfide
B glycosidic
C peptide
D phosphodiester
■■■■
2
, (ii) Give three differences between the process of DNA replication and the
process of DNA transcription.
(3)
1 ......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. .................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... . ...... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... .. ..... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
2 ......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. .................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... .. .... ....... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... ......................
3 ......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... . ...... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... .................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... .. ..... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
(Total for Question 1 = 6 marks)
3
■■■■ Turn over
, 2 The diagram shows some components of a cell membrane.
ion
P
Q
R
ATP ADP
S
T
glucose molecule
(a) The components labelled P and T are proteins.
(i) State one role of ATP in the movement of molecules through the component
labelled T.
(1)
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... .. .... ....... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... ......................
(ii) Describe how ions enter the cell through the component labelled P.
(2)
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... . .. ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... .. .... ....... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... ....... ...... ....... ...... .... ... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... ......................
......... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... .. . ...... ...... .. ..... ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... ....... ...... ...... ....... ..... ......... ... ......................
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4
■■■■
