本题目来源于试卷: Interaction & Interdependence C.3 Photosynthesis，类别为 IB生物学
[单选题]
Which term describes +dj2y :(/ ow-o vbl:divn8iqv66o6m4yy 4;ra aw om.r)logbcthe splitting of water molecules in the presence of light to produce electrons, hydrogen ions and 6mo46. rya rw)o m 6o;ga4ylbcoxygen molecules?
A. Photolysis
B. Chemiosmosis
C. The Calvin cycle
D. The electron transport chain
参考答案: A
本题详细解析:
A Photolysis is the splitting of water molecules in the presence of light to produce electrons, hydrogen ions and oxygen. This is part of the light-dependent reaction of photosynthesis. Chemiosmosis (Choice B) happens in both photosynthesis and cellular respiration. In both processes, ATP is formed from ADP and inorganic phosphate. Hence, the products are not electrons, hydrogen ions and oxygen molecules. The Calvin cycle (Choice C) is part of the light-independent reaction of photosynthesis. It produces carbon compounds and does not require light. The electron transport chain (Choice D) is a component of both photosynthesis and cellular respiration. In photosynthesis, it takes place after photolysis which is when water molecules are split, producing electrons, hydrogen ions and oxygen. Photolysis needs to take place first before these electrons can move down the electron transport chain.
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