Welcome to the Quiz!
This quiz contains 9 questions from a mix of 1 subtopics.
How can the germination of gibberellin-deficient seeds be restored?
by applying gibberellins externally
by exposing the seeds to light
by applying water to the seeds
by removing the aleurone layer
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How can shorter stems, resulting from reduced gibberellin synthesis, be beneficial for plants?
they make plants less vulnerable to weather damage and easier to harvest
they make plants more attractive to pollinators
they make plants easier to harvest
they make plants more vulnerable to weather damage
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What is the specific effect of gibberellins on plant stems?
increasing the number of leaves
decreasing the length of internodes
decreasing the number of leaves
increasing the length of internodes
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How do the sugars produced by starch hydrolysis help the embryo?
they activate other enzymes
they prevent water absorption
they inhibit further gibberellin synthesis
they provide energy and support growth
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What do amylase enzymes hydrolyse during germination?
lipids into fatty acids
cellulose into glucose
starch into maltose
proteins into amino acids
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Which enzymes are synthesised in response to gibberellins?
amylases and maltases
lipases and proteases
xylanases and ligninases
cellulases and pectinases
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What triggers the synthesis of gibberellins in a seed?
exposure to light
presence of amylase enzymes
absorption of water
reduction in water levels
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What does the endosperm of a seed contain before germination?
starch
hemicellulose
cellulose
glucose
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Which structure within a seed is the developing plant?
starch granules
aleurone layer
endosperm
embryo
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