A shift in moth frequency from more light and
less dark to more dark and less light is an
example of what type of selection?
a. stabilizing
b. directional
c. disruptive
d. frequent
e. mutational
B
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Alexander Oparin hypothesized that living cells evolved from coacervates; what was the "boundary" material of the coacervates Oparin made, and how does this boundry differ from present day liposome membranes?
A. Oparin used a phospholipid bilayer to build the coacervates, it is the same as the bilayer found in present day lysosomes. B. Oparin's coacervates were surrounded by a tight skin of water molecules, the same as present day lysosomes. C. Oparin's coacervates were surrounded by carbohydrates and lipids, unlike present day lysosomes which have a carbohydrate membrane only. D. Oparin's coacervates were surrounded by a tight skin of water molecules; present day lysosomes have a phospholipid bilayer for their membrane. E. Starch was the main component in Oparin's coacervate boundry; lysosomes also use mainly carbohydrates for their membrane.
Which type of assay uses a variety of endpoint measurements to determine whether the virus is inhibited by the antiviral drug or is demonstrating drug resistance?
a. Phenotypic b. Genotypic c. NA inhibition assay d. Enzyme immunoassay
Plants lack organ systems for disposing of toxic metabolic waste products. Their cells’ vacuoles are like what animal
cell organelle? a. nucleolus b. lysosomes c. chloroplasts d. mitochondria e. endoplasmic reticulum
Ribosomes are complex aggregates of
A. RNA and DNA. B. RNA and sugars. C. DNA and proteins. D. nucleosomes and RNA. E. RNA and proteins.