Question

QUESTION:

Which of the following is an example of active transport in a cell?

Choose 1 answer:

(Choice A)
Sodium moving out of the cell against its concentration gradient

(Choice B)
Calcium passing through channel proteins, from a high to low concentration

(Choice C)
Enzymes spreading evenly through cytoplasm

(Choice D)
Oxygen entering the cell without the use of energy

ANSWER:
CORRECT (SELECTED)
Sodium moving out of the cell against its concentration gradient.

EXPLANATION:
Active transport uses energy molecules to move particles like sodium, against their concentration gradients, from areas of low concentration to areas of high concentration.

Answer 1

(Choice A)

Sodium moving out of the cell against its concentration gradient

Step-by-step explanation:

answer on khan

Answer 2

A

Step-by-step explanation:

because active transport uses energy to move against a concentration gradient from an area of low concentration to that of of high concentration.