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OCR GCSE Combined Science

Topic questions Biological molecules Proteins

Proteins

7 questions · 11 marks · about 15 minutes

Proteins questions

TopicProteins

OCR J250 Proteins 7 questions

Biology Paper 1 June 2025 Foundation tier, Question 4 1 mark

What are proteins made up of?

A Amino acids

B Fatty acids

C Glycerol

D Sugars

Question 4, shown as an image
[1]
Reveal mark scheme Mark scheme for question 4

Biology Paper 2 June 2025 Foundation tier, Question 10 1 mark

Which pathway shows how nitrates are used by plants to make proteins?

A Nitrates fraction amino acids fraction proteins

Question 10, shown as an image
Question 10, shown as an image

D Nitrates fraction fatty acids fraction proteins

Question 10, shown as an image
[1]
Reveal mark scheme Mark scheme for question 10

Biology Paper 1 June 2022 Foundation tier, Question 4 1 mark

The diagram shows a model of a protein molecule.

Figure for question 4

Which substance is labelled P in the diagram?

A Amino acid

B Fatty acid

C Glucose

D Glycerol

Question 4, shown as an image
[1]
Reveal mark scheme Mark scheme for question 4

Biology Paper 7 November 2020 Higher tier, Question 5 1 mark

Which of these statements about proteins is correct?

A Proteins are monomers made from polymers called amino acids.

B Proteins are polymers made from monomers called amino acids.

C Proteins are monomers made from polymers called fatty acids.

D Proteins are polymers made from monomers called fatty acids.

Question 5, shown as an image
[1]
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Biology Paper 1 June 2018 Foundation tier, Question 14 5 marks

Amino acids are found in the food we eat. Different diets will contain different amounts of amino acids.

The table shows some of the amino acids we need in our diet. It also shows the mean daily intake of one adult male and the recommended daily allowance (RDA) for the same man.

Amino acidMean intake (g/day)RDA (g/day)
Histidine1.50.9
Leucine3.92.8
Lysine2.22.5
Threonine2.31.3
Valine2.81.6
(a)

Which amino acid has the lowest RDA?

[1]
Reveal mark scheme Mark scheme for question 14(a)
(b)(i)

Calculate the mean intake as a percentage of the RDA for lysine.

[2]
Reveal mark scheme Mark scheme for question 14(b)(i)
(b)(ii)

Explain why this man’s intake of lysine may affect his health.

[2]
Reveal mark scheme Mark scheme for question 14(b)(ii)

Biology Paper 7 June 2018 Higher tier, Question 10 1 mark

The table shows the dietary intake of four amino acids by one individual.

It also shows the recommended daily allowance (RDA) for the same individual.

Amino acidDietary intake (g/day)RDA (g/day)
A1.520.95
B3.982.85
C2.982.58
D2.321.36

The individual has taken in more than 100% of the RDA for each of the four amino acids.

Which amino acid in their diet has the highest percentage of the RDA?

Question 10, shown as an image
[1]
Reveal mark scheme Mark scheme for question 10

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