4. Cell membranes and transport
A section of Biology, 9700
Listing 10 of 418 questions
The statements describe events that occur during the movement of sucrose. Hydrostatic pressure is decreased. Hydrostatic pressure is increased. Sucrose is loaded into the phloem vessel. Sucrose is unloaded from the phloem vessel. Water moves by osmosis into the phloem. Water moves by osmosis out of the phloem. Water potential decreases in the phloem. Water potential increases in the phloem. Which sequence correctly describes what happens in a plant at a source during the movement of sucrose?
9700_w20_qp_11
MCQ
2020
Paper 1, Variant 1
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The cells in the roots of beetroot plants contain a red pigment. When pieces of root tissue are soaked in cold water, some of the red pigment leaks out of the cells into the water. An experiment was carried out to investigate the effect of temperature on the loss of red pigment from the root cells. It was found that the higher the temperature of the water, the higher the rate of loss of red pigment from the root cells. Which statements could explain this trend?
9700_w21_qp_13
MCQ
2021
Paper 1, Variant 3
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Questions Discovered
418