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Oxford Cambridge and RSA
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A-Level OCR 2025 Biology B
(Advancing Biology) Paper 2
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Ytvevxsgajkbcx ujhaha aas68888888
68
Friday 13 June 2025 – Morning
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A Level Biology B (Advancing Biology)
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H422/02 Scientific literacy in biology
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Time allowed: 2 hours 15 minutes
, 2
1 This question is based on the Advance Notice Article ‘Dormancy in cereals: not too much, not
too little’.
The article describes dormancy in cereal seeds, such as barley.
The diagram shows a drawing of a cross section through a barley seed.
A
B
C
(a)
(i) State the name of the structure labelled A in the diagram and state its function.
Name ................................................................................................................................................
Function ...........................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
[2]
(ii) Outline how the structure labelled B is formed and state its function.
Formation .........................................................................................................................................
..........................................................................................................................................................
Function ...........................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
[2]
© OCR 2025
, 3
(iii) The article describes how the hormones ABA and GA regulate seed dormancy.
Suggest how removal of the structure labelled C can reduce seed dormancy.
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
...................................................................................................................................................................... [2]
© OCR 2025 Turn over
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Oxford Cambridge and RSA
kkkjhadsssssssssssssssssss
A-Level OCR 2025 Biology B
(Advancing Biology) Paper 2
ssssssssssssssssssssssssss
sssssssssssssssss
Ytvevxsgajkbcx ujhaha aas68888888
68
Friday 13 June 2025 – Morning
ghgfgfggfg
A Level Biology B (Advancing Biology)
eewaawadsd
H422/02 Scientific literacy in biology
ggdsddsdsdsedses
Time allowed: 2 hours 15 minutes
, 2
1 This question is based on the Advance Notice Article ‘Dormancy in cereals: not too much, not
too little’.
The article describes dormancy in cereal seeds, such as barley.
The diagram shows a drawing of a cross section through a barley seed.
A
B
C
(a)
(i) State the name of the structure labelled A in the diagram and state its function.
Name ................................................................................................................................................
Function ...........................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
[2]
(ii) Outline how the structure labelled B is formed and state its function.
Formation .........................................................................................................................................
..........................................................................................................................................................
Function ...........................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
[2]
© OCR 2025
, 3
(iii) The article describes how the hormones ABA and GA regulate seed dormancy.
Suggest how removal of the structure labelled C can reduce seed dormancy.
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
...................................................................................................................................................................... [2]
© OCR 2025 Turn over
