本题目来源于试卷: Continuity and Change D.4 Cell & Nuclear Division，类别为 IB生物学
[单选题]
Which one of the follof1 6 v-u8og1egwe+pmp.rlm)9b 1dyip 03 ngirwing transport proteins only carries out active transport?r) rbig9pl.13i yn0dm
A. Protein channels
B. Protein pumps
C. Protein carriers
D. Aquaporins
参考答案: B
本题详细解析:
Protein pumps are membrane proteins that carry out active transport. They require the energy to pump molecules up their concentration gradient. Protein channels (Choice A), protein carriers (Choice C), and aquaporins (Choice D) all conduct passive transport.
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