The horizontal transfer process known as transduction
A) involves a virus.
B) requires a pilus.
C) requires a cell to be "competent."
D) requires a plasmid.
E) involves a mutagen.
A
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Which of the following did Watson and Crick already know when they were trying to determine the structure of DNA? The number of _____
A) purines is always larger than the number of pyrimidines B) pyrimidines is always larger than purines C) cytosines is always the same as adenines D) guanines is always the same as thymines E) purines is always the same as pyrimidines
This is a nucleotide containing molecule that is commonly used to carry electrons in the cell.
A. ADP B. ATP C. NAD+ D. pyruvic acid
Which of the following would you classify as something other than an animal?
A) sponges B) coral C) jellyfish D) choanoflagellates
Propose a valid reason to explain why is it critical that the K+ channel activation gate responds slightly slower to depolarization than the Na+ channel activation gate.
A. If both gates showed identical response times, movements of Na+ and K+ ions would cancel out each other's effects on membrane potential changes. B. If both gates showed identical response times, movements of Na+ and K+ ions would magnify each other's effects on membrane potential changes, creating dangerously large action potentials. C. It is not critical and there would be no change in action potential characteristics if this difference in response time did not exist. D. The conformational change in one gate is necessary to trigger the activation of the other.