Welcome to the Quiz!
This quiz contains 10 questions from a mix of 1 subtopics.
How does auxin binding to the cell-surface membrane lead to cell elongation?
it causes the cell to shrink
it causes the cell wall to become more rigid
it causes the cell to divide
it causes the cell wall to become more plastic
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Where is IAA mainly synthesised in plants?
in the leaves
in the stem
in the roots
in meristems
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What is the main difference between plant and animal hormones in terms of their site of action?
there is no difference in their site of action
plant hormones act locally, while animal hormones act distantly
plant hormones are not transported, while animal hormones are
plant hormones act distantly, while animal hormones act locally
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Which of the following is NOT a stimulus that plants are known to respond to through tropisms?
water
light
gravity
sound
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What is the term for the directional growth of plant parts towards or away from light?
hydrotropism
gravitropism
phototropism
thermotropism
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Which of the following best describes positive hydrotropism in roots?
growth away from gravity
growth towards moisture
growth away from moisture
growth towards gravity
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What happens to IAA during positive phototropism in shoots?
IAA synthesis is stopped
IAA is degraded on the light side
IAA moves from the light side to the shaded side
IAA moves from the shaded side to the light side
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How does IAA influence cell elongation on the shaded side of a shoot during positive phototropism?
it has no effect on cell elongation
it inhibits cell elongation
it causes cell division
it stimulates cell elongation
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What is the effect of IAA on the lower side of a root during positive gravitropism?
it has no effect on cell elongation
it inhibits cell elongation
it stimulates cell elongation
it causes cell division
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What is actively transported from the cytoplasm into the cell wall during auxin-induced cell elongation?
hydrogen ions
sodium ions
potassium ions
chloride ions
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