Question

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1. True or False? (1pt each) ----Unt Tor directions). True False Photosystems are used in the Calvin Cycle reactions. True False True False True O False O False True True False During the light dependent reactions, an electron carrier is oxidized. Before an electron becomes excited, it is said to be in its ground state. Protons (H") passively diffuse across the thylakoid membrane via ATP synthase. During the Calvin Cycle, ATP is used to help convert 3PGA into BPG. NADPH is used during the regeneration stage of the Calvin Cycle. Most of the G3P molecules formed in the Calvin Cycle are used to produce sugar. ATP is produced during the light independent reactions. The bonding of CO2 to RuBP occurs during the carboxylation stage. Electrons that leave PSI help to replace the electrons lost by PSII. True False True True False False O False O True

Answer 1

a. FALSE
Photosystems are used in light-dependent reactions

b. TRUE
Electron carriers get oxidized and reduced during light reactions
EX: NADP+ is reduced to NADPH
(It can be false if we consider only NADP+)

c. TRUE
An electron in the ground state enters the excited state upon energy absorption

d. TRUE
Protons passively diffuse from the thylakoid lumen into the chloroplast stroma via the ATP synthase complex.

e. TRUE
3-PG + ATP ----> 1, 3-BPG + ADP

f. FALSE
NADPH is used during the reduction phase

g. FALSE
Most of the G3P molecules (10/12) are used for the regeneration of RUBP

h. TRUE
ATP and NADPH are produced during light-dependent reactions

i. TRUE
The carboxylation stage involves the addition of CO2 to RUBP

j. FALSE
Electron flow occurs from PS-II to PS-I.