Protein folding in the ER is assisted by a chaperone called
a. BiP.
b. PiP.
c. Hsp60.
d. Hsp90.
Answer: a. BiP.
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When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each other, the F2 generation included both red- and white-eyed flies. Remarkably, all the white-eyed flies were male. What was the explanation for this result?
A) The gene involved is on the Y chromosome. B) The gene involved is on the X chromosome. C) The gene involved is on an autosome, but only in males. D) Other male-specific factors influence eye color in flies. E) Other female-specific factors influence eye color in flies.
What do you know about selection?How does it relate to the question?
What will be an ideal response?
A package of histones with DNA wrapped around them forms spherical structures called
a. nucleoli. b. chromatin. c. nucleosomes. d. ribosomes. e. lysosomes.
MOST ocular lenses magnify specimens by a factor of
a) 10x. b) 100x. c) 1,000x. d) 2,000x.