What are the key steps in the light dependent reaction of photosynthesis?

  1. Light energy from the Sun excites electrons in chlorophyll and the excited electrons are emitted.2. The chlorophyll molecule is now positively charged and chemically less stable. The lost electrons get replaced with electrons released from the photolysis of water: 2H2O --> 4H+ + 4e- + O2.3. The excited electrons pass through the electron transport chain, a passage involving a series of redox reactions. This occurs in the thylakoid membranes.4. At each transfer, energy is released and is used to combineADP + Pi -->ATP 5. NADP is the final electron acceptor and gets reduced to form NADPH. This goes on to be used in the light independent reaction of photosynthesis.6. Oxygen is a by product of this reaction and can either be used in aerobic respiration of the plant, or it can diffuse out as a waste product.
AA
Answered by Aditi A. Biology tutor

19541 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

Why do organs need to be 'matched'?


What is the fluid mosaic model?


Explain the functional differences between a t-RNA and an m-RNA molecule


How is an Action Potential transmitted across a synapse?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences