The first example of an antimicrobial drug synthesized in the laboratory was

A. penicillin.
B. sulfa.
C. erythromycin.
D. Salvarsan.


D

Biology & Microbiology

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The yellow color of urine is from

a. urea. b. salts. c. degraded hemoglobin. d. blood plasma proteins. e. glucose

Biology & Microbiology

An organism's is its position in the food chain, relative to the ecosystem's energy source.

A. keystone level B. climax level C. trophic level D. habitat E. niche

Biology & Microbiology

During this stage of mitosis, the nuclear envelope begins to break down and the spindle begins to form.

A. Metaphase B. Prometaphase C. Anaphase D. Prophase E. Telophase

Biology & Microbiology

You are studying a trafficking protein important for secretion in helper T cells. What is the likely outcome of a defect in this protein?

A. Impaired secretion of immunoglobulins B. Impaired secretion of degraded antigens C. Impaired secretion of cytokines D. Impaired secretion of membrane attack complex

Biology & Microbiology