本题目来源于试卷: Interaction & Interdependence C.2 Cell Respiration，类别为 IB生物学
[单选题]
Which of the followingh h3k+q .7ukak processes does not require energy fra tdl1e 5p,m1kom ATP?
A. Sodium-potassium pumps
B. Facilitated diffusion
C. Endocytosis
D. Anabolic reactions
参考答案: B
本题详细解析:
Facilitated diffusion is a passiveq 1gv3w2jqbcs *x 9o6v process that allows the movement of molecules across a cell membrane with the help of transport proteins. It does not require energy input (ATP) because molecules move down their concentration gradient. Therefore Choice B is correct.
Sodium-potassium pumps (Choo qs3c6g9wvqj xb2 v*1ice A) actively transport sodium ions out of cells and potassium ions into cells against their concentration gradients. This process requires energy in the form of ATP. Endocytosis (Choice C) is an active process by which cells engulf substances by invagination of the cell membrane to form a vesicle around them. This process requires energy in the form of ATP. Anabolic reactions (Choice D) involve the synthesis of complex molecules from more simple ones. These reactions typically require energy input in the form of ATP.
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