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OCR MERGED QUESTION PAPER AND MARK SCHEME GCSE (9–1) Combined Science A(Gateway Science)J250/07 Biology (Higher Tier)FOR MAY 2024 $11.99   Add to cart

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OCR MERGED QUESTION PAPER AND MARK SCHEME GCSE (9–1) Combined Science A(Gateway Science)J250/07 Biology (Higher Tier)FOR MAY 2024

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OCR MERGED QUESTION PAPER AND MARK SCHEME GCSE (9–1) Combined Science A(Gateway Science)J250/07 Biology (Higher Tier)FOR MAY 2024

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  • October 16, 2024
  • 47
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Computer information systems
  • Computer information systems
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williesmaish2999
Friday 10 May 2024 – Morning
GCSE (9–1) Combined Science A
(Gateway Science)
J250/07 Biology (Higher 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 The table shows some information about insulin in the body.

Which row shows the correct information about insulin?

Organ that produces insulin Type of signal Target organ

A liver chemical pancreas

B liver electrical pancreas

C pancreas chemical liver

D pancreas electrical liver



Your answer [1]


2 The length of a bacteria cell is 5.3 µm.

What is the length of this cell in mm?

(1 mm = 1000 µm)

A 5.3 × 10–6

B 5.3 × 10–3

C 5.3 × 103

D 5.3 × 106


Your answer [1]

, 3
3 What are two characteristics of a cell membrane?

A Non-selective barrier and contains plasmids

B Non-selective barrier and contains receptors

C Selective barrier and contains plasmids

D Selective barrier and contains receptors


Your answer [1]


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

Which term describes the molecule labelled M?


M




A Active site

B Enzyme

C Lock and key

D Substrate


Your answer [1]


5 What is a difference between embryonic stem cells and adult stem cells?

A Adult stem cells are less likely to be rejected when used in transplants.

B Only embryonic stem cells can differentiate.

C Only embryonic stem cells produce a full range of different cell types.

D There are more ethical issues in the use of adult stem cells.


Your answer [1]




© OCR 2024 Turn over

, 4
6 The resolution of a microscope is limited to half the wavelength of light used to see the image.

Our eyes only detect light with a wavelength greater than 400 nm.

What is the approximate resolution of a light microscope?

(1000 nm = 1 µm)

A <0.2 µm

B ~0.2 µm

C ~0.4 µm

D >0.4 µm


Your answer [1]


7 The photograph shows two different blood vessels.




Blood vessel T Blood vessel S




Which statement about these blood vessels is correct?

A Blood flows through blood vessel T at a slower rate.

B Blood vessel S has a thinner muscular wall.

C Blood vessel T has a larger lumen diameter.

D Both blood vessels transport blood to the heart.


Your answer [1]




© OCR 2024

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