Question

The sugar molecules are too large to pass without help. channel proteins help these molecules pass with or without required energy? a. no energy needed b. energy needed

Answer 1

Sugar molecules use facilitated diffusion through channel proteins to pass through the cell membrane without the need for energy, moving down their concentration gradient.

Step-by-step explanation:

When sugar molecules need to pass through a cell membrane, and they are too large to do so on their own, they require assistance from channel proteins or carrier proteins. This process is known as facilitated diffusion, which is a type of passive transport. In facilitated diffusion, though a protein aids in the transport of the sugar molecules across the membrane, this process does not require an input of energy from the cell in the form of ATP (Adenosine Triphosphate) because the molecules are moving down their concentration gradient, from an area of higher concentration to an area of lower concentration. Therefore, the correct answer to the student's question about whether the transport of glucose through channel proteins requires energy would be a. no energy needed.