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OCR GCSE BIOLOGY A JUNE 2025 PAPER 4 HIGHER TIER MODEL ANSWERS WORKED SOLUTIONS

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OCR GCSE BIOLOGY A JUNE 2025 PAPER 4 HIGHER TIER MODEL ANSWERS WORKED SOLUTIONS

Instelling
Vak

Voorbeeld van de inhoud

Oxford Cambridge and RSA

Monday 9 June 2025 – Morning
GCSE (9–1) Biology A (Gateway Science)
J247/04 (Higher Tier)
Time allowed: 1 hour 45 minutes



H
You must have:
* 1 9 1 6 4 1 6 1 7 8 *




• a ruler (cm/mm)
You can use:
• a scientific or graphical calculator
• an HB pencil




* J 2 4 7 0 4 *




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 90.
• 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 32 pages.

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




© OCR 2025 [601/8589/2] OCR is an exempt Charity
DC (PQ/SG) 347684/4 Turn over


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, 2
Section A

You should spend a maximum of 30 minutes on this section.

Write your answer to each question in the box provided.

1 A student is investigating variation by collecting data on shoe sizes.
These are the shoe sizes of six members of their family.

10 5 6 7 8 6


Which of these statements about the data is correct?

A The mean shoe size and the modal shoe size are the same.

B The mean shoe size is 6.

C The mean shoe size is larger than the modal shoe size.

D The modal shoe size is 7.


Your answer [1]



2 People can be vaccinated against HPV.

Which graph shows the correct link between the number of people vaccinated and the number of
people with cervical cancer?

A Cases of B Vaccinated
cervical cancer against HPV

Number Vaccinated Number
of people against HPV of people
Cases of
cervical cancer

Year Year


C D Vaccinated
against HPV
Number Vaccinated Number
of people against HPV of people Cases of
Cases of cervical cancer
cervical cancer
Year Year


Your answer [1]
© OCR 2025



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, 3
3 What is an adaptation of white blood cells?

A They can change shape to squeeze out of blood vessels into tissues.

B They have many ribosomes to produce antibiotics.

C They lack a nucleus so that they can engulf bacteria.

D They produce enzymes to make blood clot.


Your answer [1]



4 What is the correct definition of hydroponics?

A A process for growing plants in a mineral solution

B A process in the water cycle

C The movement of sweat out of sweat glands in the skin

D The movement of water in xylem vessels


Your answer [1]



5 An organism has the alleles Aa for a gene.

What do the Aa alleles represent?

A A heterozygous genotype

B A heterozygous phenotype

C A homozygous genotype

D A homozygous phenotype


Your answer [1]




© OCR 2025 Turn over

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, 4
6 Which of these units of genetic material is largest?

A Base

B Chromosome

C Gene

D Genome


Your answer [1]



7 The flow chart shows some developments in our understanding of genetics.

A The characteristics of two parents are blended so that the offspring has
intermediate characteristics.




B Characteristics are controlled by pairs of factors and one copy of each is passed on
to the next generation.




C Genes are the unit of inheritance and have specific locations on chromosomes.




D Genes are made of DNA.

Which stage on the flow chart represents the ideas of Mendel?


Your answer [1]



8 Which of these diseases is caused by a bacterium?

A AIDS

B Barley powdery mildew

C Crown gall disease

D Tobacco mosaic disease


Your answer [1]

© OCR 2025



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