Question 1

What biological event results from the activity of gibberellins during germination?

  A  

synthesis of amylase in the aleurone

  B  

synthesis of amylase in the endosperm

  C  

synthesis of amylose in the aleurone

  D  

synthesis of amylose in the endosperm

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Question 2

Which plant hormone is known to stimulate seed germination and stem elongation?

  A  

auxin

  B  

gibberellin

  C  

ethylene

  D  

cytokinin

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Question 3

What is the role of gibberellins in seed germination?

  A  

they inhibit the growth of the seed embryo

  B  

they stimulate the closing of stomata

  C  

they stimulate the production of enzymes that break down food stores

  D  

they promote the synthesis of protective seed coats

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Question 4

What effect do auxins have on the growth of plant shoots?

  A  

they prevent cell elongation

  B  

they stimulate seed germination

  C  

they promote cell elongation

  D  

they induce flower blooming

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Question 5

What is the function of the aleurone layer during seed germination?

  A  

it protects the seed from parasites

  B  

it absorbs water to initiate germination

  C  

it facilitates the seed's emergence from the soil

  D  

it synthesises amylase to break down starch

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Question 6

What mechanism prevents the Venus flytrap from closing unnecessarily?

  A  

a time interval between stimuli responses

  B  

electrical resistance

  C  

hormonal signals

  D  

a constant open state of potassium channels

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Question 7

What is the effect of applying gibberellins externally to seeds?

  A  

it causes seeds to dry out

  B  

it induces seed dormancy

  C  

it enhances the production of auxins within the seeds

  D  

it enables seeds to germinate normally

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Question 8

How do electrical signals travel across plant tissues?

  A  

via the xylem and phloem

  B  

through synapses

  C  

through changes in potential difference similar to action potentials in animals

  D  

by using chemical hormones only

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Question 9

What effect does the binding of auxin to its receptor have on a plant cell?

  A  

it activates a membrane protein that pumps protons out of the cell

  B  

it stimulates the cell to enter dormancy

  C  

it triggers the immediate release of ethylene

  D  

it encourages the cell to start the germination process

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Question 10

What triggers the closure of the Venus flytrap?

  A  

detection of bright light by the leaf cells

  B  

a chemical signal from digested insects

  C  

accumulation of water within the leaf lobes

  D  

stimulation of the sensory hairs by prey

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