Is it possible that the carbon atoms in your body may have once made up the living tissues of another person or animal in earlier times? This is
A. impossible since carbon can't enter a living system more than once.
B. possible since carbon cycles through the biosphere.
C. highly unlikely since carbon is always tied up in molecules in organisms or minerals.
D. possible only if you are a cannibal.
Answer: B
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What metabolic advantage do cells have in storing the elemental sulfur byproduct from sulfide oxidation?
A) The cells avoid producing transport energy waste to secrete the sulfur. B) The byproduct serves as an electron reserve for subsequent oxidation. C) Sulfur decreases the intracellular acidification for non-acid-tolerant sulfide oxidizers. D) The byproduct can be used for other biosynthetic pathways that use sulfur, such as Rieske Fe-S proteins.
Repair of thymine dimers using light to split the dimers apart into separate monomers is called
A. photoreactivation. B. photoreparation. C. photodedimerication. D. None of the choices are correct.
Which gland is/are located nearest the kidneys?
A) ovaries B) pancreas C) pineal glands D) adrenal glands
Design an experiment to compare the effectiveness of a physical and a chemical method of disinfection
What will be an ideal response?