Which of the following is responsible for getting large or charged (polar) molecules across the cell membrane?

Question

Group of answer choices

A

C

D

B

Answer 1

It seems like there might be some information missing, such as the specific options corresponding to A, B, C, and D. However, I can provide information regarding how large or charged (polar) molecules typically cross the cell membrane.

Large or charged molecules usually pass through the cell membrane via:

1. Transport Proteins: These include channel proteins, which provide pathways for specific molecules, and carrier proteins, which change shape to help transport molecules across the membrane.

2. Endocytosis: For even larger molecules or particles, the cell can engulf them through a process called endocytosis.

If you provide the specific options corresponding to A, B, C, and D, I can help determine which one is the correct answer.