Who disproved the theory of spontaneous generation?
a. Hooke
b. Koch
c. van Leeuwenhoek
d. Pasteur
e. Virchow
Ans: d. Pasteur
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True or false? All pollutants are synthetic chemicals
Indicate whether the statement is true or false
A molecule that binds to an enzyme at a location other than the active site and thereby alters the enzyme's shape, making it inactive or less active is a(n) ________ inhibitor.
Fill in the blank(s) with the appropriate word(s).
How is the 4-letter language of nucleic acids converted into the 20-word language of amino acids?
a. The 4 nucleic acid bases combine in 2-letter combinations that define different amino acids. b. The 4 nucleic acid bases combine in 3-letter sequences that define different amino acids. c. Triplets of the 2-letter nucleic acid bases are translated into the 20 different amino acids. d. The 4 bases each specify 1 amino acid, which give rise to the remaining 16 amino acids. e. The 4 bases are first converted into tRNA molecules, which can each attach to 5 amino acids.
________________halophiles require at least a 9% salt concentration in order to grow, whereas ______________ halophiles can adapt to a wide range of solute concentrations.
A) Facultative; obligate B) Osmotolerant; obligate C) Obligate; facultative D) Osmotolerant; facultative E) Facultative; osmotolerant