Question

Which of the following are key functions carried out by membrane proteins?

A) Catalyze specific chemical reactions on the surface of the membrane
B) Transport specific ions and molecules across the membrane
C) Short-term storage of excess energy
D) Function as cell-surface identity markers
E) Receive external chemical messages

Answer 1

Membrane proteins carry out key functions in a cell's membrane, including catalyzing specific chemical reactions, transporting ions and molecules, and functioning as cell-surface identity markers.The correct option is A, B, D.

Step-by-step explanation:

Membrane proteins play various key functions in a cell's membrane. Three of the key functions carried out by membrane proteins include:

1. Catalyzing specific chemical reactions on the surface of the membrane: Some membrane proteins act as enzymes that facilitate specific chemical reactions on the membrane surface.
2. Transporting specific ions and molecules across the membrane: Some membrane proteins act as channels or transporters, allowing the movement of ions and molecules across the membrane.
3. Functioning as cell-surface identity markers: Certain membrane proteins serve as markers that help identify the cell and its interactions with other cells or molecules.The correct option is A, B, D.