Allergic reactions to penicillins are considered a(n) ________ hypersensitivity.

A. Both T-cell-mediated and antibody-mediated are correct.
B. immune complex-mediated
C. immediate
D. T-cell-mediated
E. antibody-mediated


Answer: C

Biology & Microbiology

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Which of the following cannot be addressed directly using biotechnology?

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The genome is all the individual's 

A. DNA. B. mRNA. C. tRNA. D. All of these answers are true.

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Which by-product of photosynthesis was important in altering the atmosphere of the earth so that aerobic organisms could evolve?

A) methane B) oxygen C) carbon dioxide D) nitrogen E) fructose

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Depolarization occurs due to the diffusion of K+ across a neuron plasma membrane

Indicate whether the statement is true or false.

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