48. The photosynthetic herbicide Diuron inhibits photosynthesis by binding to the reactive center chlorophyll molecules in photosystem I, consequently which of the following most likely does not occur?
a) release of O2 b) ATP production by ATP synthase c) NADP+ reduction to NADPH
d) oxidation of glucose e) none of these is likely to occur
49. Photorespiration is caused by the binding of ______ to RuBP-bisphosphate carboxylase?
a) CO2 b) O2 c) 3-phophphoglycerate d) ATP e) NADPH
50. Photorespiration reduces photosynthetic productivity?
a) not at all b) actually enhances the amount of CO2 reduced c) between 20% & 50%
d) only on unicellular algae e) none of these is correct
51. During chloroplast photosynthesis the Proton Motive Force accumulates protons in?
a) the thylakoid lumen b) the chloroplastm c) the perimitochondrial space
d) cytosol of the cells e) none of these is correct
52. It is estimated that about 35% (one third) of human proteins lack a rigid, predetermined structure, i.e., they are unstructured due to high hydrophilic amino acid content regions? a) true b) false
53. The turnover number of an enzyme is?
a) the time it takes for half of the reactant to be converted to product
b) the number of reactions catalyzed by a single enzyme molecule per second
c) the magnitude of the increase in reaction rate by a non-enzyme catalyzed reaction
d) the number of ATP molecule split during an enzyme catalyzed reaction
e) none of these is correct