Draw and label a generic microbial growth curve, including the points at which metabolites are formed.

What will be an ideal response?


Biology & Microbiology

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Hyperpolarization of the postsynaptic nerve terminal

A) decreases the chance that an action potential will be initiated. B) increases the chance that an action potential will be initiated. C) does not affect the initiation of an action potential. D) is stimulated by an influx of calcium ions. E) none of the above

Biology & Microbiology

If you were designing a method to specifically inhibit prokaryotic transcription, but not eukaryotic transcription, interfering with which of the following would work best?

A) an intercalating agent B) recognition of the prokaryotic promoter by RNA polymerase C) DNase activity D) RNA polymerase II activity E) ribosomal binding to mRNA

Biology & Microbiology

Both base substitution and frameshift mutations can result in the formation of premature stop codons

Indicate whether the statement is true or false

Biology & Microbiology

Imagine an extinction event that results in a great loss of taxa but only an insignificant loss of morphological diversity. How has this mass extinction pruned the "tree of life?"

a. Big "branches" of the tree of life have been removed. b. Many exterior "twigs" have been pruned but not big branches. c. A single, taxon-rich, but morphologically homogenous, "branch" has gone extinct. d. A and C. e. B and C.

Biology & Microbiology