Question:

Cyclic-photophosphorylation results in the formation of

Updated On: Jun 6, 2022
  • NADPH + H$^+$
  • ATP and NADPH + H$^+$
  • ADP
  • ATP
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The Correct Option is D

Solution and Explanation

In cyclic photophosphorylation, only $PS-I$ takes part and the electrons released from the reaction centre $P_{700}$ return to it after passing through series of carrier. It takes place in stromal lamellae o f the chloroplast which lack $PS II$ and $NADP$ reductase enzyme. The excited electron does not pass on to $NADP^{+}$ but is cycled back to the $PS I$ complex through electron transport chain. Hence, through the cyclic flow only the synthesis o f $ATP$ takes place
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Concepts Used:

Photosynthesis in Higher Plants

Processes Of Photosynthesis in Higher Plants:

Photosynthesis in higher plants involves the following processes:

  • Light Reaction
  • Dark Reaction

Light Reaction:

  • This phenomenon occurs in the presence of light.
  • The pigment absorbs light and produces energy in the form of ATP.
  • The process involves- absorption of light, water splitting, the release of oxygen, and formation of ATP and NADPH.

Dark Reaction:

This process occurs in the absence of light in the stroma of the chloroplasts. The following cycles are involved in the process:

  1. Calvin Cycle (C3 Cycle)
  2. C4 Cycle (Hatch and Slack Pathway)