Question

sugar molecules can be transported across the cells plasma membrane with the help of which biomolecules?
carbohydrates
lipids
proteins
nucleic acids

Explanation:

Sugar molecules are transported across the cell - plasma membrane by transport proteins (carrier proteins or channel proteins). Carbohydrates are sugars themselves, lipids are mainly for energy storage and membrane - structure, and nucleic acids store and transmit genetic information.

Answer:

C. Proteins