Which of the following is false? As a cell grows, its
A. volume increases.
B. surface area increases.
C. surface-area-to-volume ratio increases.
D. metabolic needs increase.
C. surface-area-to-volume ratio increases.
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So far, the only disease that has been globally eradicated is
A. polio. B. smallpox. C. measles. D. diphtheria.
Of the G3P generated in the Calvin cycle, 5/6 will be used to regenerate RuBP. A company
manufacturing widgets would go out of business if 5/6 of the widgets were recycled at the manufacturing site rather than being sold. And yet plants survive this extreme inefficiency. Why?
a. Actually, 5/6 of the G3P is used to build glucose and only 1/6 of the G3P is needed to regenerate RuBP. b. Plants are extremely efficient in other ways and that compensates for this anomaly. c. There is unlimited CO2 for the plant to use, so it's okay to "waste" some by regenerating RuBP. d. The plant expends no energy to acquire the light energy that drives the Calvin cycle, so there is no pressure on the system to become more efficient. e. The cyclic pathway of the light reactions compensates for the energy lost in RuBP regeneration.
Histones that are tightly wound by DNA and are the basic unit of chromatin are called
A. facilitators sites. B. operons. C. repressor genes. D. protein clusters. E. nucleosomes.
The oxygen that arose in early Earth's atmosphere was likely produced by organisms that were very similar to modern
A) plants. B) algae. C) fungi. D) cyanobacteria. E) protists.