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OCR MERGED QUESTION PAPER AND MARK SCHEME GCSE (9–1) COMBINED SCIENCE A(GATEWAY SCIENCE)J250/01 BIOLOGY (FOUNDATION TIER)FOR MAY 2024 $11.89   Add to cart

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OCR MERGED QUESTION PAPER AND MARK SCHEME GCSE (9–1) COMBINED SCIENCE A(GATEWAY SCIENCE)J250/01 BIOLOGY (FOUNDATION TIER)FOR MAY 2024

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OCR MERGED QUESTION PAPER AND MARK SCHEME GCSE (9–1) COMBINED SCIENCE A(GATEWAY SCIENCE)J250/01 BIOLOGY (FOUNDATION TIER)FOR MAY 2024

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  • October 16, 2024
  • 40
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Graduation in computer science
  • Graduation in computer science
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williesmaish2999
Friday 10 May 2024 – Morning
GCSE (9–1) Combined Science A
(Gateway Science)
J250/01 Biology (Foundation Tier)
Time allowed: 1 hour 10 minutes

, 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 A student prepares a microscope slide to view colourless plant cells.

Which type of substance is used to colour the cells?

A Acid

B Hormone

C Lipid

D Stain


Your answer [1]


2 The total magnification of an image viewed using a light microscope is calculated using a
formula.

What is the correct formula for total magnification?

A Total magnification = eyepiece lens magnification × objective lens magnification

B Total magnification = eyepiece lens magnification – objective lens magnification

C Total magnification = eyepiece lens magnification + objective lens magnification

D Total magnification = eyepiece lens magnification ÷ objective lens magnification


Your answer [1]


3 Plasmids are small rings of genetic material.

Which row describes where plasmids are found?

Where they are found Type of cell

A cytoplasm eukaryotic

B cytoplasm prokaryotic

C nucleus eukaryotic

D nucleus prokaryotic



Your answer [1]
© OCR 2024

, 3
4 The graph shows the effect of pH on the activity of two enzymes.

Identify the pH where both enzymes are active.




Enzyme activity




2 4 6 8 10 12 14
pH

A pH 4

B pH 6

C pH 8

D pH 10


Your answer [1]




© OCR 2024 Turn over

, 4
5 The model represents a molecule found inside human cells.




Which of these describes this model?

A Monomer and a double helix

B Monomer and a double twist

C Polymer and a double helix

D Polymer and a double twist


Your answer [1]


6 The diagrams show stages in the hypothesis used to explain the mechanism of enzyme action.




Which term describes this hypothesis?

A Active site

B Denaturing

C Enzyme specificity

D Lock and key


Your answer [1]




© OCR 2024

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