Genes that encode proteins that are always needed are called:a

repressible genes.
b. promoter genes.
c. constitutive genes.
d. inducible genes.
e. operons


C

Biology & Microbiology

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E. coli is propelled by ____

a. rotating bundles of pili b. a single cilium c. a single flagellum d. rotating bundles of cilia e. rotating bundles of flagella

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The muscles of the body wall are derived mainly from which embryonic cell layer in most

eumetazoans?

a. mesoderm b. epiderm c. mesoglea d. endoderm e. ectoderm

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Notochords are found in

a. adult hemichordates (acorn worms). b. adult urochordates (tunicates). c. adult cephalochordates (lancelets). d. a and b only. e. b and c only.

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Which of the following statements regarding vesicant agent treatment is correct?

A) British anti-lewisite is carried by civilian EMS units. B) Aggressive airway support must occur prior to decontamination. C) No antidotes exist for sulfur mustard or phosgene oxime exposure. D) IV access should be deferred until the patient is at a burn center.

Biology & Microbiology