Question

question 6 of 10 which is a factor that determines whether a molecule can cross a cell membrane? a. speed b. polarity c. mass d. texture

Explanation:

Cell membranes are composed of a lipid - bilayer. Non - polar molecules can easily cross due to the non - polar nature of the lipid tails, while polar molecules have difficulty crossing without the help of transport proteins. Speed, mass, and texture are not primary factors in determining membrane - crossing ability.

Answer:

B. Polarity