Consider the situation where photosynthesis is going on at a steady pace in a typical experiment with a light on, and carbon dioxide is being combined with ribulose-bisphosphate (RuBP) to produce 3-phosphoglycerate (3PG). Then suddenly the source of carbon dioxide is eliminated. What changes in the concentrations of 3PG and RuBP would occur?
1. 3PG levels rise, RuBP levels fall.
2. 3PG levels fall, RuBP levels rise.
3. 3PG levels rise, RuBP levels rise.
4. 3PG levels fall, RuBP levels fall.
PGA as the first CO2 fixation was discovered in the photosynthesis of
(1) bryophyte
(2) gymnosperm
(3) angiosperm
(4) algae
Who discovered photophosphorylation?
(1) Arnon et. al.
(2) Von Mayer
(3) Clavin et.al.
(4) Hill
Hill reaction occurs in:
(1) high altitude plants
(2) total darkness
(3) absence of water
(4) presence of ferricyanide
1. | ATP | 2. | NADH |
3. | NADPH | 4. | Oxygen |
Cyclic -photophosphorylation results in the formation of:
1. NADPH
2. ATP and NADPH
3. ATP, NADPH, and O2
4. ATP
During non-cyclic photophosphorylation, when electrons are lost from the reaction center at PS II, what is the source which replaces these electrons?
1. | Oxygen | 2. | Water |
3. | Carbon dioxide | 4. | Light |
Which of the following statements is incorrect?
1. | Grana lamellae have both PSI and PS II. |
2. | Cyclic photophosphorylation involves both PS I and PS II. |
3. | Both ATP and NADPH+H+ are non-cyclic synthesized during photophosphorylation. |
4. | Stroma lamellae have PS I only and lack NADP reductase. |
I: | A possible location where this could be happening is in the stroma lamellae. |
II: | While the membrane or lamellae of the grana have both PS I and PS II, the stroma lamellae membranes lack PS II as well as NADP reductase enzyme. |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |