PTH is necessary to produce calcitriol (activated vitamin D), which is necessary for the movement of calcium through cells. In this case, how would you characterize PTH?
A) permissive B) antagonistic C) submissive D) synergistic
Answer: A
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What type of molecule is shown in the accompanying figure?
a. saturated fatty acid b. unsaturated fatty acid c. triglyceride d. wax e. steroid
Select the statement that explains the usefulness of metagenomic analysis in research today.
A. It detects the abundance of microorganisms in an environment. B. It evaluates microbial diversity in a habitat. C. It allows the identification of unculturable microorganisms. D. All of these are correct statements.
As a microbiologist, you have been asked to investigate the regulation of a novel gene in a bacterial species. Given what is known about bacteria, the logical place to begin your investigation is
A. translational regulation. B. regulation by enhancer elements. C. transcriptional regulation. D. regulation by general transcription factors. E. alternative splicing regulation.
Which of the following is true about endospores?
A) Endospores are considered reproductive structures. B) Endospores are only viable for a short time. C) Endospores are highly resistant to environmental stress such as heat, drying, freezing, and radiation. D) Endospores are susceptible to various chemicals. E) Endospores are metabolically active structures.