Chapter 11 - Photosynthesis Flashcards
what process descibes the absorbtion of a photon by chlorophyll?
photoionisation
How does photoionisation result in the production of ATP and reduced NADP?
When the photoionised electron is released it moves down the electron transfer chain resulting in the movement of protons across a chloroplast membrane through ATP snythase - NADP is final electron acceptor
How is the chlorophyll regenerated?
The photolysis of water into protons, electrons (into chloroplast) and oxygen
Why is the light dependent step required for the light independent step?
Because both the reduced NADP and ATP produced in the light dependent step are used to form simple sugars
Why is the light dependent step required for the light independent step?
Because both the reduced NADP and ATP produced in the light dependent step are used to form simple sugars
How is CO2 used in the Calvin Cycle?
CO2 reacts with Ribulose Bisphosphate (RuBP) to form 2 Glycerate-3-phosphate molecules (GP) - Catalysed by rubisco
What happens to GP in the Calvin Cycle?
ATP and Reduced NADP turn it into Triose Phosphate (TP)
How is TP used in the Calvin Cycle
TP is used to regenerate the RuBP molecule whilst also a small amount of it is converted into useful organic substances
Which environmental factors limit photosynthesis rate?
Light levels - linear (plateau)
CO2 concentration - linear (plateau)
Temperature - bell curve graph
