With regard to photosynthesis, photorespiration ____
a. is more efficient in producing carbohydrates
b. predominates in C3 plants in cool weather when water is plentiful
c. predominates in C4 plants on hot days
d. produces the same amount of PGA
e. is less efficient in producing carbohydrates
ANSWER: e
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Biochemical evidence supporting our current model of muscle contraction includes the observation that
A) myosin binds calcium. B) titin binds calcium. C) actin has ATPase activity. D) myosin has ATPase activity. E) actin and myosin have the same molecular weight.
Myoglobin content is high in
a. fast anaerobic fibers. b. fast aerobic and fast anaerobic muscle fibers. c. slow muscle fibers and fast aerobic muscle fibers. d. slow muscle fibers. e. fast aerobic fibers.
Describe the events that result in a beating heart
What will be an ideal response?
At the end of _____ and cytokinesis, haploid cells contain chromosomes that each consist of two sister chromatids.
A) metaphase II B) telophase I C) telophase D) telophase II E) interphase