Thioploca species contain large vacuoles that store ________, which is used to ________ under anaerobic conditions
A) nitrate / oxidize sulfide
B) oxygen / oxidize sulfur
C) sulfur / reduce nitrate
D) glycogen / provide energy
Answer: A
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One cell sends second messengers to another cell through gap junctions. What type of signaling would this be considered?
A. Direct contact B. Paracrine C. Endocrine D. Synaptic E. Autocrine
Immediately after a meal, the concentration of
glucose in the blood tends to increase due specifically to what digestive system task? a. mechanical processing b. secretion c. digestion d. absorption e. elimination
Another term for a triplet code is ________
A) an enhancer B) a promoter C) tRNA D) a factor E) a codon
Which of the following statements accurately describes why Taq polymerase is used in PCR?
A. It has regions that are complementary to the primers. B. It is heat stable and can withstand the heating step of PCR. C. It binds more readily than other polymerases to the primers. D. Only minute amounts are needed for each cycle of PCR.