a) Flowering plants produce a protein that is sensitive to light - Edexcel - GCSE Biology - Question 4 - 2017 - Paper 1
Question 4
a) Flowering plants produce a protein that is sensitive to light.
The diagram shows the effect of light on this protein.
inactive protein ____________ active prot... show full transcript
Worked Solution & Example Answer:a) Flowering plants produce a protein that is sensitive to light - Edexcel - GCSE Biology - Question 4 - 2017 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
The correct answer is C - photoperiodicity, as it describes the plant's response to the length of daylight.
Step 2
Explain why fewer hours of daylight cause short-day plants to flower.
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Answer
Short-day plants require longer periods of darkness to initiate flowering. The active protein that inhibits flowering is less produced when daylight hours are reduced, allowing the flowering process to occur.
Step 3
Suggest how flowering can be inhibited in sugar cane.
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Answer
Flowering in sugar cane can be inhibited by manipulating light exposure. For instance, providing extended periods of light can keep the active protein levels high, which inhibits the flowering process in this short-day plant.
