UGA BIOL 1108 - BIOLOGY TEST QUESTONS (8 pages)

Unformatted text preview:

BIOLOGY TEST QUESTONS TEST 2 1 You measure the amount of ATP and NADH consumed by the Calvin Cycle in 1 hour You find 30 000 molecules of ATP consumed but only 20 000 molecules of NADH Where did the extra ATP molecules come from a Cyclic electron flow b Photosystem I c Linear electron flow d Photosystem II e Chlorophyll 2 When oxygen is released as a result of photosynthesis it is a direct by product of a Chemiosmosis b The electron transfer system of photosystem I c The electron transfer system of photosystem II d Reducing NADP e Splitting water molecules 3 The dissociation of cytochrome c from the respiratory chain is necessary for electron flow from complex III to complex IV a True b False 4 The presences of cholesterol in the plasma membranes of some animals a Enables the animal to add hydrogen atoms to the unsaturated phospholipids b Enables the membrane to stay fluid more easily when cell temperature drops c Makes the animal more susceptible to circulatory disorders d Enables the animal to remove hydrogen atoms from saturated phospholipids e Makes the membrane less flexible allowing it to sustain greater pressure from within the cell 5 CAM plants are very sensitive to the presence of water and cannot grow in hot dry places a True b False 6 Succinate dehydrogenase catalyzes the conversion of succinate to fumarate The reaction is inhibited by malonic acid which resembles succinate but cannot be acted upon by succinate dehydrogenase Increasing the ratio of succinate to malonic acid reduces the inhibitory effect of malonic acid What is malonic acid s role with respect to succinate dehydrogenase a It blocks the binding of fumarate b It is an allosteric regulator c Its is a competitive inhibitor d It is able to bind to succinate e It is a noncompetitive inhibitor 7 jbgvThiamine pyrophosphate is a coenzyme for one of the three enzymes involved in the conversion of pyruvate to acetyl CoA If thiamine is deficient the coenzyme will be absent leading to the harmless