Chemotherapeutic agents that are natural products of microorganisms are most specifically referred to as ________.
A. antibiotics
B. antimicrobial agents
C. synthetic drugs
D. semisynthetic drugs
Answer: A
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A human mother’s genes seem to influence brain development while a human father’s genes seem to influence growth. What does this imply?
A. The mother imprints her brain development genes and the father imprints his growth genes. B. The mother imprints her growth genes and the father imprints his brain development genes. C. Mothers and fathers both imprint brain development genes. D. Brain development genes are present in the mitochondria, while growth genes are present in the nucleus. E. Brain development genes are on the X chromosome and growth genes are on the Y chromosome.
The pathogenesis of Neisseria gonorrhoeae is dependent upon phase variation. Which of the following statements concerning phase variation is incorrect?
A. Phase variation allows Neisseria cells to escape immune detection. B. Phase variation involves alterations to the structure of the fimbriae. C. Phase variations results from genetic rearrangements in the Neisseria chromosome. D. Phase variation results in Neisseria cells adopting a pleomorphic morphology.
Which chemical is responsible for breaking down ozone in the atmosphere?
A) CO2 B) CH3 C) CFC D) CO4
Describe the difference between a totipotent cell and a pluripotent cell
What will be an ideal response?