photosynthesis

Question 1

where do the light-dependant and light-independent reactions occur in plants?
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Answer 1

dependant - thylakoids of chloroplasts
independent - stroma of chloroplasts

Question 2

explain the role of light in photoionisation
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Answer 2

chlorophyll absorbs the light energy
this excites 2 electrons and they’re released from the chlorophyll

Question 3

2 main stages involved in ATP production in the light-dependent reaction 🦎🌴🪷

Answer 3

-electron transfer chain
-chemiosmosis

Question 4

what happens in the electron transfer chain?🐾🎀🐚

Answer 4

electrons released from chlorophyll travel down carrier proteins in the thylakoid membrane
undergo redox reactions which release energy

Question 5

what is photolysis?🪼🦎
what’s is produced from this?🦧🦖

Answer 5

light energy splits molecules of water
produces 1O2, 4protons, 4electrons

Question 6

3 main stages in the calvin cycle?💓

Answer 6

carbon fixation
reduction
regeneration

Question 7

at the start of LIR, what is co2 fixed with?
what enzyme catalyses this?
what does this form?
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Answer 7

ribulose biphosphate
rubisco
2 glycerate-3-phosphate

Question 8

how many turns of the calvin cycle are required to produce 1 molecule of glucose per co2🫏

Answer 8

6

Question 9

describe phosphorylation?🦈

Answer 9

there’s a greater conc of portions in the thylakoid space than the stroma
proton gradient forms so they diffuse across the membrane
this movement drives phosphorylation
ATP synthase phosphorylates ATP from ADP+Pi