A “solar-hydrogen age” has the possibility of ending

a. smog.
b. oil spills.
c. acid rain.
d. a reliance on nuclear energy.
e. all of these.


Answer: e

Biology & Microbiology

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Spontaneous mutation occurs when

A) a DNA base is in an unstable tautomeric form as the replication fork arrives and a mismatched base is inserted. B) a person smokes cigarettes or is exposed to a teratogen for many years. C) the sugars and phosphates in the DNA double helix exchange places. D) thymine temporarily becomes uracil.

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A(n) ________ mycelium is a branching network of fibers on and/or beneath the surface of the agar growth medium.

Fill in the blank(s) with the appropriate word(s).

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Explain the similarities and differences between direct and indirect methods of measuring microbial growth, and give examples of each

What will be an ideal response?

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Where do substrates bind to enzymes?

A) in the active site B) anywhere C) in the effector site D) in the substrate groove

Biology & Microbiology