Bacteria are grown in 15N (heavy) medium and then transferred to 14N (light) medium and are allowed to replicate for one generation. The DNA is subsequently isolated and centrifuged in a CsCl2 gradient to yield what type of gradient band(s)?
A. one heavy and one half-heavy band
B. one heavy and one light band
C. one light band
D. one half-heavy (intermediate to heavy and light) band
E. one heavy band
Answer: D
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The portion of the genome that encodes proteins is called the ____________________
Fill in the blank(s) with correct word
All of the following are effective for destroying prions EXCEPT
A) boiling. B) incineration. C) NaOH + autoclaving at 134°C. D) proteases. E) None of the answers are correct; each of these will destroy prions.
The domestic dog has 39 pairs of homologous chromosomes. A dog's somatic cells have ________ chromosomes and gametes have ________ chromosomes.
A) 78; 78 B) 78; 39 C) 39; 15 D) 156; 78 E) 39; 39
Which condition is also known as nearsightedness?
a. red-green color blindness b. astigmatism c. hyperopia d. myopia e. cataracts