Question

Facilitated Diffusion Requires which of the following? Select all that apply.
Group of answer choices

Transport proteins

ATP

A concentration gradient

Kinetic energy

Answer 1

Facilitated diffusion requires the following:

1. **Transport proteins** - Facilitated diffusion involves specific proteins that help transport molecules across the cell membrane.
2. **A concentration gradient** - Facilitated diffusion occurs along a concentration gradient, from an area of higher concentration to an area of lower concentration.

The following options do not apply:

- **ATP** - Facilitated diffusion does not require ATP, as it is a passive transport mechanism.
- **Kinetic energy** - While kinetic energy is always present in molecules and plays a role in diffusion overall, facilitated diffusion specifically does not require an external input of energy.

So, the correct answers are **Transport proteins** and **A concentration gradient**.