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MERGED QUESTION PAPER AND MARK SCHEME 2025 Pearson Edexcel AS Level GCEIn Biology A Salters Nuffield (8BN0)Paper 01: Lifestyle, Transport, Genes andHealth

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MERGED QUESTION PAPER AND MARK SCHEME 2025 Pearson Edexcel AS Level GCEIn Biology A Salters Nuffield (8BN0)Paper 01: Lifestyle, Transport, Genes andHealth

Institution
Biology
Course
Biology

Content preview

Monday 12 May 2025
Morning (Time: 1 hour 30 minutes) Paper
reference 8BN0/01
Biology A (Salters Nuffield)  


Advanced Subsidiary
PAPER 1: Lifestyle, Transport, Genes and Health




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




DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
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 Messenger 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
*P78687A0228* 

, (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
 *P78687A0328* Turn over

, 2 The diagram shows some components of a cell membrane.

ion




DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
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



*P78687A0428* 

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Institution
Biology
Course
Biology

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