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2025 Pearson Edexcel AS Level GCE In Biology A Salters Nuffield (8BN0) Paper 01: Lifestyle, Transport, Genes and Health QUESTION PAPER AND MARKING SCHEME (MERGED)

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2025 Pearson Edexcel AS Level GCE In Biology A Salters Nuffield (8BN0) Paper 01: Lifestyle, Transport, Genes and Health QUESTION PAPER AND MARKING SCHEME (MERGED)

Institution
PEARSON EDEXCEL
Course
PEARSON EDEXCEL

Content preview

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‑pointpen.
centre number and candidate number.

• Show all your working out in calculations and include units where appropriate. – there maybe more space than you
Answer the questions in the spaces provided
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 RNA?
(1)
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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(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)

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(ii) Describe how ions enter the cell through the component labelled P.
(2)

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4
■■■■

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Institution
PEARSON EDEXCEL
Course
PEARSON EDEXCEL

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Uploaded on
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