Which of the following processes takes place in the presence of ATP?
I. Diffusion
II. Active transport
III. Facilitated diffusion

I only

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II only

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III only

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I and III

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II and III

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Solution

The correct option is B II only
When the molecules move from a region of lower concentration to the region of higher concentration against their concentration gradient, is called as active transport. For this purpose, energy and carrier protein is needed to cross the membrane. Whereas facilitated transport also requires a transmembrane carrier protein molecule but it is a passive process and thus, not required energy. Thus, the correct answer is option B.

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Similar questions

Assertion: Both facilitated diffusion and active transport are mediated through membrane proteins.

Reason: Only active transport is selective in action.

Q. What is facilitated diffusion and active transport ?

Small amounts of monosaccharides like glucose, amino acids and some of electrolytes like chloride ions are absorbed by (i). However, some of the substances like fructose and some amino acids are absorbed by the mechanism called (ii). Various nutrients like amino acids and electrolytes like Na+ are absorbed into the blood by (iii).

a) i) facilitated transport ii) active transport iii) simple diffusion

b) i) simple diffusion ii) facilitated transport iii) active transport

c) i) active transport ii) facilitated transport iii) simple diffusion

d) i) simple diffusion ii) active transport iii) facilitated transport

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III. Osmosis - Water

IV. Facilitated diffusion - Glucose

Q. In plants, diffusion is the only process that aids in transportation of water and minerals.

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Which of the following processes takes place in the presence of ATP?I. DiffusionII. Active transportIII. Facilitated diffusion

Which of the following processes takes place in the presence of ATP?
I. Diffusion
II. Active transport
III. Facilitated diffusion