Which of the following represents a reactant or input for the light reaction of photosynthesis?
A. oxygen
B. carbon dioxide
C. ATP
D. NADPH
E. H2O
E. H2O
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The movement of actin and myosin fibers in a muscle contraction contains all of the following steps except
A. the myosin head returns to its original conformation. B. the globular myosin head detaches from the actin filament. C. the myosin head attaches to the actin filament. D. the myosin filament advances relative to the actin filament. E. myosin rolls up from one end, forming a ball.
A ________ is a device used for growing mass cultures.
Fill in the blank(s) with the appropriate word(s).
Mutation rates of human genes are expressed as the number of ____
a. nucleotides substitutions per gene b. frameshift mutations per genome c. mutated alleles per genome d. induced mutations per generation e. mutated alleles per gene in each generation
One of the societal benefits of genetic engineering today is
A) the production of human proteins by bacteria and yeast for the treatment of human diseases. B) genetically modified humans. C) gene therapy for many human genetic diseases. D) human cloning. E) human cloning and genetically modified humans.