Which of the following accepts electrons in the light reactions?Group of answer choicesNADHchlorophyll aNADPHG3PNAD⁺chlorophyll bNADP⁺
Question
Which of the following accepts electrons in the light reactions?
Group of answer choices:
- NADH
- chlorophyll a
- NADPH
- G3P
- NAD⁺
- chlorophyll b
- NADP⁺
Solution
In the light reactions of photosynthesis, the molecule that accepts electrons is NADP⁺.
Here's a step-by-step explanation:
- Light reactions begin when photons hit the chlorophyll molecules in the thylakoid membrane of the chloroplasts.
- This energy excites electrons in the chlorophyll, causing them to jump to a higher energy level.
- These high-energy electrons are then transferred along a series of proteins known as the electron transport chain.
- At the end of this chain, the electrons are accepted by NADP⁺, which also picks up a proton (H⁺) to form NADPH.
- NADPH then carries these high-energy electrons to the next stage of photosynthesis, the Calvin cycle.
So, the correct answer is NADP⁺.
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