L9 Photosynthesis Flashcards
Where does the light reactions take place?
Thylakoid membrane
What is the Thylakoid membrane protein complexes made of?
(1) Photosystem two (PS II)
(2) Cytochrome bf complex
(3) Photosystem one (PS I)
(4) ATP synthase
The first three is used for electron transport
What is the final electron acceptor in Photosystem II?
Plastoquinone (PQ)
Which component in the ATP synthase act as a passage of proton from lumen to stroma?
F0
What is the function of F1 in the ATP sythase?
Formation of ATP from ADP (photophosphorylation)
PS II and cytochrome bf mainly occur in which part in the thylakoid membranes?
Stacked membrane
According to the theory explaining the evolution of chloroplast, which kind of bacteria is responsible for the origin of PS II?
Purple bacteria
According to the theory explaining the evolution of chloroplast, whcih kind of bacteria is responsible for the origin of PS I ?
Green sulfur bacteria
Photosynthesis might be thought of the reverse of which two reaction?
Glycolysis and TCA cycle
What are the three stages of Calvin Cycle?
(1) Carboxylation
(2) Reduction
(3) Regeneration
What is the enzyme responsible for Carboxylation stage?
Ribulose bisphosphate carboxylase (Rubisco)
*Rubisco is the most abandunt protein on earth
What mainly happens in the reduction stage of the dark reaction?
Formation of glyceraldehyde-3-P
What mainly happens in the third stage of the dark reaction?
Regeneration of ribulose 1,5-bisphosphate
Where does the starch biosynthesis occurs?
Chloroplast stroma
Where does the sucrose biosynthesis occurs?
Cytosol
Give a brief definition of photorespiration
Light-driven metabolic process with no carbon fixation
What is the product of oxygenase activity of Rubisco?
2-phosphoglycolate
Which pathway salvages 2-phosphoglycolate to form 3-phosphoglycolate?
Glycolate pathway
There are ATP requirement and releases of CO2
What is the metabolites in C4 plants represents the first product of CO2 fixation?
oxaloacetate, which is formed from Ribulose 1,5-bisphosphate
Which of the folloing reaction types are not found in the Calvin cycle?
A. Carboxylation
B. Transketolase reaction
C. Substrate level phosphorylation
D. Reduction reaction
Substrate level phosphorylation is not found
