Which of the following statements about photophosphorylation is FALSE?
A) Light liberates an electron from chlorophyll.
B) The oxidation of carrier molecules releases energy.
C) Energy from oxidation reactions is used to generate ATP from ADP.
D) It requires CO2.
E) It occurs in photosynthesizing cells.
D
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Bread mold can grow in a minimal medium without supplements (wild type) while certain mutated strains (mutants) can only grow in a minimal medium that is supplemented with specific intermediates found in the following metabolic pathway for arginine synthesis:
minimal ------> ornithine -------> citrulline ------> arginine, where enzyme 1 converts the precursor to ornithine, enzyme 2 converts ornithine to citrulline, and enzyme 3 converts citrulline to arginine. A strain that can grow in a minimal medium containing arginine, but NOT in a minimal medium containing citrulline or ornithine would have a mutation in the gene that encodes for A. enzyme 1. B. enzyme 2. C. enzyme 3. D. both enzymes 1 and 3. E. both enzymes 2 and 3.
The youngest leaf primordium is produced closest to the stem tip because:
A. Auxins are closest to the tip. B. The tip is elongating outward. C. The leaf primordial only respond to light. D. The primordial lack a sense of direction. E. Expansion genes do not function well in aging tissue.
Which of the following represents a gamete with a dominant allele?
A. bb B. b C. AA D. Aa E. A
Which of the following is an example of an alternative energy that uses renewable resources?
A. burning oil B. geothermal energy C. burning coal D. burning petroleum