Which of these statements is true of the energy in an open system containing living organisms?
a. The system will quickly settle into equilibrium.
b. This system will generate a net surplus of energy.
c. There must be a net influx of energy to this system.
d. Energy transfers cannot be tracked in open systems.
c. There must be a net influx of energy to this system.
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What would the result be when a soil is supplemented with S0?
A) dimethyl sulfide production due to mixotrophs B) organic carbon production due to anaerobes C) soil acidification due to chemolithotrophs D) syntrophic utilization of sulfite
Acetylcholine is a neurotransmitter released by motor neurons that causes skeletal muscle fibers to relax.
a. true b. false
Your muscle cells need large amounts of ATP to function in the movement of your body. Which of the following organelles would you expect to be especially abundant in muscle cells?
a. mitochondria c. smooth endoplasmic reticulum b. ribosomes d. lysosomes
Which of the following statements about M protein is FALSE?
A) It is found on Streptococcus pyogenes. B) It is found on fimbriae. C) It is heat- and acid-resistant. D) It is readily digested by phagocytes. E) It is a protein.