A retrovirus such as HIV contains.
A) RNA and enzymes for its conversion.
B) a double strand of DNA.
C) many enzymes to control budding of new virions.
D) numerous mitochondria.
Ans: A) RNA and enzymes for its conversion.
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Within a genome, an enhancer may be located
A) upstream of the gene enhanced. B) downstream of the gene enhanced. C) within the gene enhanced. D) choices A, B, and C E) both choices A and B
In the figure above, what absorbs photons of light only in the blue/violet range and not light in the red
portion of the spectrum?
a. 5 with 3 b. 5 with 4 c. 5, regardless of the R group d. 6 e. 7
Name the single individual whose work in the mid-1800s contributed to our understanding of the particulate nature of inheritance as well as the basic genetic transmission patterns. With which organism did this person work?
A) Gregor Mendel; Pisum sativum B) George Beadle; Neurospora C) Calvin Bridges; Drosophila D) Charles Darwin; Ephestia E) Thomas Hunt Morgan; Drosophila
White blood cells (WBCs) are more resistant to lysis than red blood cells (RBCs). When looking at a sample of blood for WBCs, what could you do to reduce interference from RBCs?
A) Mix the blood in a salty solution to cause the RBCs to lyse. B) Mix the blood in an isotonic solution and allow the WBCs to float to the top. C) Mix the blood in a hypotonic solution, which will cause the RBCs to lyse. D) Mix the blood in a hypertonic solution, which will cause the RBCs to lyse.