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Official summer 2024 OCR GCE Biology A H420/01: Biological processes A Level Merged Question Paper + Mark Scheme $7.99   Add to cart

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Official summer 2024 OCR GCE Biology A H420/01: Biological processes A Level Merged Question Paper + Mark Scheme

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Official summer 2024 OCR GCE Biology A H420/01: Biological processes A Level Merged Question Paper + Mark Scheme

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  • August 29, 2024
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  • 2024/2025
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  • Official summer 2024 OCR GCE A/AS LEVEL
  • Official summer 2024 OCR GCE A/AS LEVEL
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Official summer 2024

OCR
GCE
Biology A
H420/01: Biological processes
A Level


Merged Question Paper + Mark Scheme




Ace your Mocks!!!

, Oxford Cambridge and RSA

Wednesday 5 June 2024 – Afternoon
A Level Biology A
H420/01 Biological processes
Time allowed: 2 hours 15 minutes

You can use:
* 1 3 4 5 7 3 5 2 6 8 *




• a scientific or graphical calculator
• a ruler (cm/mm)




* H 4 2 0 0 1 *




Please write clearly in black ink. Do not write in the barcodes.

Centre number Candidate number


First name(s)

Last name


INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
• Where appropriate, your answer should be supported with working. Marks might be
given for using a correct method, even if your answer is wrong.

INFORMATION
• The total mark for this paper is 100.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 36 pages.

ADVICE
• Read each question carefully before you start your answer.




© OCR 2024 [601/4260/1] OCR is an exempt Charity
DC (SK/SG) 330031/7 Turn over

, 2
Section A

You should spend a maximum of 20 minutes on this section.

Write your answer to each question in the box provided.

1 Which statement about lipids is correct?

A Lipids are polar molecules.

B Lipids that contain fatty acids with carbon–carbon double bonds are liquid at room
temperature.

C Saturated fatty acids, which are present in some lipids, contain carbon–carbon double
bonds.

D The presence of carbon–carbon double bonds in fatty acids allows lipids to pack more
closely together.

Your answer [1]



2 Lipids, polysaccharides, nucleic acids and proteins are all macromolecules.

Which statement about macromolecules is correct?

A All macromolecules are formed in hydrolysis reactions.

B Lipids are not polymers, but polysaccharides, nucleic acids and proteins are polymers.

C Lipids are polymers of fatty acids and glycerol.

D Macromolecules all consist of repeating units of monomers.

Your answer [1]




© OCR 2024

, 3
3 The diagram shows part of a plasma membrane.




X




How can molecule X be described?

A It has a hydrophilic head and a hydrophobic tail.

B It is formed when the glycerol in a triglyceride is replaced by a phosphate.

C It is non-polar.

D The tails are joined to the head by peptide bonds.

Your answer [1]



4 Which statement describes a feature of plasma membranes?

A Channel proteins are a type of intrinsic protein.

B Glycolipids are intrinsic proteins that have lipid molecules attached.

C Phospholipids form a rigid bilayer that membrane proteins are attached to.

D The plasma membrane forms an impermeable barrier.

Your answer [1]




© OCR 2024 Turn over

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