Which of the following statements about fermentation is true?
a. It allows the electron transport chain to continue in the absence of oxygen.
b. It provides additional protons to allow the electron transport chain to continue.
c. It is an alternative way to return electron carriers to their oxidized state.
d. It is an alternative way for a cell to produce oxygen.
Answer: c. It is an alternative way to return electron carriers to their oxidized state.
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Amino acids are linked together by peptide bonds in a ____
A. starch. B. polypeptide. C. polysaccharide. D. nucleic acid. E. phospholipid.
Which one of the following expressions from the logistic equation (dN/dt = rN ((K - N)/K) represents the proportion of unused resources remaining for use by the population?
A. the carrying capacity (K) B. the population size (N) C. the biotic potential (rN) D. (K - N)/K E. the growth rate (dN/dt)
__________ increase the free surface area of
epithelia that absorb substances. Fill in the blank(s) with the appropriate word(s).
Bacterial cell walls contain which complex molecule composed of carbohydrate chains connected by peptides?
a. Chitin b. Peptidoglycan c. Phospholipid d. Cellulose