Multiple Choice
In the process of translocation in plants, which substances primarily move downward from the leaves to other parts of the plant?
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6. The Membrane
Introduction to Membrane Transport
Multiple Choice
Which of the following statements regarding dialysis is correct?
A
Dialysis moves water but not solutes across the membrane.
B
Dialysis only occurs in living cells and not in artificial systems.
C
Dialysis requires energy input from ATP to transport molecules.
D
Dialysis allows the selective movement of solutes across a semipermeable membrane based on their size.
Verified step by step guidance1
Understand the concept of dialysis: Dialysis is a process that involves the movement of solutes across a semipermeable membrane. This membrane allows certain molecules to pass through based on their size while blocking others.
Clarify the mechanism: Dialysis relies on passive transport, meaning it does not require energy input from ATP. Molecules move due to concentration gradients, not active transport.
Differentiate dialysis from osmosis: Unlike osmosis, which primarily involves the movement of water, dialysis focuses on the selective movement of solutes through the membrane.
Recognize that dialysis can occur in artificial systems: Dialysis is not limited to living cells. It is commonly used in medical treatments, such as kidney dialysis, where artificial membranes are employed to filter blood.
Confirm the correct statement: Dialysis allows the selective movement of solutes across a semipermeable membrane based on their size, which aligns with the principles of passive transport and molecular filtration.
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