October 11, 2023
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OCR GCSE COMBINED SCIENCE BIOLOGY A PAPER 1 2023 (J250/01: Foundation Tier). DOWNLOAD On www.Hackedexams.com Instantly.
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 of these substances is transported out of the human body as waste?
A Blood
B Food molecules
C Oxygen
D Urea
Your answer [1]
2 The graph shows the effect of pH on enzyme activity.
What is the pH when enzyme activity is highest?
Enzyme...
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