Question 2
In non-cyclic photophosphorylation when an electron is lost by the reaction centre molecules of PSI:
a) ATP is produced
b) plastoquinone is reduced
c) PSII receives the electron
d) Ferrodoxin transfers the electron to allow NADP+ to be reduced
Question 3
The cytochrome b/f complex in chloroplasts:
a) accepts an electron from PSII in cyclic photophosphorylation
b) accepts an electron from PSI in cyclic photophosphorylation
c) accepts electrons from plastocyanin and donates an electron to plastoquinone
d) is involved in the passage of protons from the thylakoid lumen to the stroma
Question 4
Cyclic photophosphorylation in plants:
a) increases ATP production relative to NADPH synthesis
b) does not involve ferredoxin acting as an electron acceptor
c) is involved in the transfer of electrons from PSI to PSII
d) increases the concentration of NADPH in the stroma
Question 5
During the transport of electrons through the electron transport pathway in chloroplasts, protons:
a) are moved down their concentration gradient
b) accumulate in the intermembrane space
c) are pumped into the stroma
d) accumulate in the thylakoid lumen
Question 6
Chemiosmosis in the chloroplast:
a) is driven by the conversion of NADP+ to NADPH
b) occurs because protons accumulate in the stroma of the chloroplast
c) is linked to the action of the chloroplast double membrane
d) occurs on the thylakoid membrane
your help is greatly appreciated!
thanks heaps in advance to those who help!
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