Assertion (A): Active transport is uphill transport.

Reason (R): Active transport uses energy to pump molecules against it's concentration gradient.

Both A & R are true and R explains A

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Both A & R are true and R doesn't explain A

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A is true and R is false

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Both A & R are false

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Solution

The correct option is A
Both A & R are true and R explains A

Active transport uses energy to pump molecules against concentration gradient i.e from the region of lower concentration to higher concentration and hence the transport is referred as uphill transport.

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Similar questions

Assertion (A): Active transport is uphill transport.

Reason (R): Active transport uses energy to pump molecules against the concentration gradient.

Consider the following statements and choose the correct answer.

I. Carrier proteins are needed by both facilitated diffusion and active transport and are sensitive to inhibitors that react with the protein.

II. Different types of proteins present in the membrane play a major role in both active as well as passive transport.

III. The carrier proteins needed by facilitated and active transport are specific.

IV. There is no need of energy to pump molecule against a concentration gradient in active transport.

V. Transport rate reaches the saturation point when all the active proteins are used.

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