Essential nutrients move through a cell membrane by both passive transport and active transport. Which of the following correctly describes the transport of materials across a cell membrane?

This question lacks options, the options are:

A). Active transport requires chemical energy to move nutrients from areas of low concentration to areas of high concentration.

B). Passive transport requires chemical energy to move nutrients from areas of low concentration to areas of high concentration.

C). Active transport moves nutrients from areas of high concentration to areas of low concentration without the use of chemical energy.

D). Passive transport moves nutrients from areas of low concentration to areas of high concentration without the use of chemical energy.

The answer is A

Explanation:

Transport of materials across a cell occurs via passive transport or active transport depending on whether energy input is required or not to facilitate the movement.

- Passive transport is the transport of materials e.g nutrients from areas of high concentration to areas of low concentration i.e down a concentration gradient, without the use of chemical energy (ATP).

- On the other hand, active transport requires chemical energy (ATP) to move nutrients from areas of low concentration to areas of high concentration i.e against concentration gradient.

one would be wind another would be water density