Which is NOT a major function of proteins?

A. Provides cell structure
B. Stores energy for the cell
C. Functions as regulator molecules in cellular activity
D. Functions as carrier molecules

is it D

No, it's A.

actually sorry, I meant B, that's ATP's job to provide energy

To determine which is NOT a major function of proteins, we need to evaluate the given options:

A. Provides cell structure: Proteins are essential for providing structure to cells, including building and maintaining cell membranes, cytoskeleton, and organelles.

B. Stores energy for the cell: Some proteins can serve as a source of energy storage, such as glycogen in animals and starch in plants.

C. Functions as regulator molecules in cellular activity: Proteins play a crucial role in regulating various cellular activities, including controlling gene expression, enzymatic activity, and signal transduction pathways.

D. Functions as carrier molecules: Proteins are involved in transporting various molecules across the cell membrane or within the cell. Examples include transport proteins that move substances like oxygen, hormones, and ions.

Based on the above analysis, it appears that all of the given options (A, B, C, and D) are indeed major functions of proteins. None of them can be ruled out as NOT a major function of proteins. Therefore, the correct answer is none of the above.