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Question:

What is the difference between light dependant and light independant photosynthesis?

The question states all you need to know.light dependant = light phase of photosynthesislight independant = dark phase.

Answer:

Light dependent reactions occur on the grana. Light energy stimulates electron activity in the chlorophyll (which is on the grana). This splits water molecules into 1. oxygen (which is released into the air) 2.hydrogen ions (or just protons) which are carried by acceptor molecules (NADPH) 3. electrons, which are carried by ATP molecules. obviously, this stage needs light, so it can only happen during the day. Light independent occurs in the stroma. All it needs are CO2, the acceptor molecules from above and ATP from above. The CO2 goes through the krebs cycle which produces two PGAL from 6 CO2. The two PGAL can form glucose or other sugar in the cytosol. This stage doesnt need light to occur, and can happen anytime.
Light dependent stage: Water + ADP oxygen + hydrogen ions + ATP Above the arrow should be: “sunlight” and “chlorophyll” Light independent stage: Carbon dioxide + hydrogen ions + ATP glucose + ADP The second stage doesn’t need light but it does need the product from the first stage
theres no such thing as light independent photosynthesis just a part of it doesnt require light

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