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Question 3Which of the following can cross the cell’s plasma membrane without theassistance of protein transporters?Select all that apply.A.positively charged ionsB.large polar moleculesC.small hydrophobic molecules
10/15/2015Cell Membrane Quiz2/3Points:10 out of 10Points:10 out of 10Points:10 out of 10D.gassesFeedbackCorrect. Gases are small enough to cross the membrane without assistance. Theinner portion of the membrane is hydrophobic, so hydrophobic molecules alsocan cross on their own provided they are small enough.Question 4How does the selective permeability of the membrane help the cell.