Which of the following is NOT a means of regulating gene expression?
A) Varying the rate at which messenger RNAs are translated
B) Regulating how long a protein lasts in a cell
C) Varying the rate at which messenger RNAs are transcribed
D) Deleting genes from cells in which they are not needed
E) Modifying proteins after they are synthesized
D
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Selecting for transformants involves
A. identifying organisms that have taken up recombinant DNA. B. searching for RNA. C. production of proteins. D. production of DNA.
After loading wood into a fireplace, you realize you have gotten a splinter in your finger. Within a short period of time, your finger is painful, red, and swollen, and is warm to the touch. This is an example of ________.
A. acquired immunity B. specific resistance C. adaptive immunity D. nonspecific resistance
A random variable that can only take on a countable number of values is known as what type of random variable?
A. Continuous B. Population parameter C. Probability density function D. Discrete
The term obligate refers to
A) The ability to exist in a wide range of conditions B) Using light for energy production C) Using oxygen for metabolism D) Using chemicals for energy production E) Existing in a very narrow niche