Each diploid cell of a human female contains _______ of each type of chromosome.
a. one
b. two
c. four
d. a total of 23
e. a total of 46
Ans: b. two
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Where does the lens FOCUS an image in the mammalian eye?
a. on the retina, using the entire surface of the retina b. primarily on the fovea c. on the rods only d. slightly in front of the retina, so the neural cells don't distort the image e. it depends on where you are looking; sometimes on the fovea, sometimes elsewhere on the retina
The pituitary gland is regulated most directly by the
a. pineal gland. b. hypothalamus. c. pancreas. d. adrenal gland. e. thyroid gland.
Given below are 3 keywords: Residential, Crayfish, Aggression Using Boolean operates (AND, OR, NOT), which of the following combinations will give you the maximum number of hits/results after you perform a literature search on the Web of Science?
A. Residential NOT Crayfish AND Aggression B. Residential OR Crayfish NOT Aggression C. Residential AND Crayfish AND Aggression D. Residential OR Crayfish OR Aggression
What would likely result from a mutation in the promoter for lac operon structural genes that increased the number of RNA polymerase molecules that bind to the DNA?
A. lacI protein production would increase. B. Lactose would be metabolized much faster. C. Polycistronic mRNA production would increase. D. Lactose would be metabolized much slower. E. Repression at the lacO site would not be reduced but expression would increase regardless.