Discuss how recent advances in the molecular biology of nucleic acids have revolutionized methods used for the identification of infectious disease agents and how they are favored over traditional biochemical tests
What will be an ideal response?
Answer: Molecular biology techniques that generally look to identify gene sequences or mRNA transcripts are especially powerful in clinical diagnostics, because they do not usually require propagation of cells and culturing techniques that can take days. Biochemical tests can reveal only the presence/absence, whereas molecular techniques such as real-time PCR can provide information about the quantity of a particular taxon.
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Media in which all components and their concentration are known are called ________ media.
A. defined B. selective C. enrichment D. transport
The apprentice in your horticulture lab accidentally trims all of the axillary buds from a particularly prized specimen. After realizing his mistake, he rather glumly asks you, as lead horticulturalist, about the effects on the plant. You predict that
A. the plant will die rapidly from this loss. B. the plant will regrow the lost buds. C. the plant will continue its vertical growth and will be a tall and skinny variety. D. the plant will continue its horizontal spread and will be a wide but short variety.
Which of the following is NOT recycled but is lost from ecosystems?
A) nitrogen B) energy C) magnesium D) carbon
Which of the following is found in RNA but not DNA?
A) adenine B) cytosine C) deoxyribose D) guanine E) uracil