The splitting up of a water molecule into two hydrogen ions and an oxygen atom by light is called:
Correct answer: C. Photolysis of water
- A. Electrolysis of water
- B. Ionization of water
- C. Photolysis of water
- D. Autolysis
Explanation
The correct answer is photolysis of water. In the light-dependent reactions of photosynthesis, light energy is used to split water molecules into oxygen, protons, and electrons. This process, known as photolysis, occurs in the thylakoid membranes of chloroplasts and is essential for the generation of oxygen and the synthesis of energy carriers like ATP and NADPH. Other options, such as electrolysis and ionization of water, do not involve the use of light energy, and autolysis is unrelated to photosynthesis.
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Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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Formation of ATP during cyclic electron flow is called:
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The correct sequence of electron carriers that receive the electrons from the primary electron acceptor of PS-II and pass them to PS-I:
Pick up the one not involved in the cyclic electron flow of the light reaction of photosynthesis:
As electrons move down the photosynthetic electron transport chain, their energy goes on decreasing and is used by the thylakoid membrane to produce: