本题目来源于试卷: Form and Function B.3 Membranes & Membrane Transport，类别为 IB生物学
[单选题]
Which of these membrane prock-6.lto b- ifteins carry out active transpo +.swkhc 8qr9lrt?
A. Protein channels
B. Protein pumps
C. Peripheral proteins
D. Receptors
参考答案: B
本题详细解析:
Protein pumps are membrane proteins that pump molecules up their concentration gradient using energy in the form of ATP. Protein channels (Choice A) carry out passive transport while receptors (Choice D) and peripheral proteins (Choice C) do not transport proteins.
| 
