If you are setting up a PCR reaction, how much extension time per cycle should you allocate for the Taq DNA polymerase to amplify a 5-kb DNA fragment from a 10-kb template?
A) 1 minute
B) 2.5 minutes
C) 5 minutes
D) 10 minutes
E) 20 minutes
C
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How does peer review influence the development of scientific theories?
A. Peer review allows other scientists to know what is current in their field. B. Careful evaluation of research results by other scientists ensures that only solid and legitimate research results are published, and helps prevent faulty research or false claims from being viewed as scientific fact. C. Peer review increases competition among scientists and thus increases the quality of the published work. D. Peer review makes it extremely difficult for work to be published other than earth-shattering scientific theories.
Which of the following hormones is NOT produced by the adrenal gland?
A. epinephrine B. cortisol C. prolactin D. aldosterone E. norepinephrine
Select the best response to the question. ? ?Which of the following is NOT a safe injection practice?
A) performing hand hygiene before and after administering an injection B) placing a used syringe on the patient's bedside table C) placing a used syringe immediately in a sharps container D) donning gloves prior to giving the injection
Dolly, the cloned sheep, had telomeres that ___________________.
A. were unusually short B. were unusually long C. became longer with each cell division D. did not change in length E. were perfectly normal