How many different types of amino acids are found in proteins?
A) 4 B) 1,000 C) 200 D) 100 E) 20
Answer: E
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Blood agar is both a differential and enriched medium.
Answer the following statement true (T) or false (F)
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 genus of gastropod has been reported to have caused human fatalities?
a. Cyphoma b. Cassis c. Conus d. Busycon e. Nassarius
Simple sequence repeat loci are highly variable because of what process?
A) repair of double strand breaks that result from exposure to X-rays B) exposure to DNA damaging chemicals found in food and water C) the formation of thymine dimers by ultraviolet light D) slipped mispairing during DNA replication