For each glucose molecule that enters glycolysis, how many times does the Krebs cycle turn?
A. One
B. Two
C. Three
D. Four
Answer: B. Two
Biology & Microbiology
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Light enters the eye's interior through the __________, an adjustable opening in the center of the
muscular, doughnut-shaped iris. Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
Archaeal sulfate reducers use elemental sulfur as an electron acceptor.
Answer the following statement true (T) or false (F)
Biology & Microbiology
Modern invertebrates first appear in the fossil record during the
A) Cambrian period. B) Silurian period. C) Precambrian era. D) cyanobacteria. E) Devonian period.
Biology & Microbiology
In a transmission electron microscope, the "lenses" are
A) made of glass. B) thin films of metal. C) lasers. D) magnets. E) vacuums.
Biology & Microbiology