Chemical germicides
A. may react irreversibly with proteins/enzymes.
B. may react with cytoplasmic membranes or viral envelopes.
C. may be disinfecting or even sterilizing.
D. are sensitive to dilution factor, time of contact, and temperature of use.
E. All of the choices are true.
Ans: E. All of the choices are true.
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DNA and RNA contain functional units known as:
A. peptides. B. enzymes. C. amino acids. D. nucleotides. E. fatty acids.
An example of a mutagen that integrates into the double-helix of DNA resulting in the inhibition of DNA replication would be
A. EMS B. Nitrous acid C. 5BU D. 2-amino purine E. Acridine dyes
Hepatitis B virus
A. is transmitted to newborns from chronic carrier mothers. B. has many chronic carriers. C. is principally transmitted by blood. D. transmission risks include shared needles, anal intercourse, and heterosexual intercourse. E. All of the choices are correct.
In feedback inhibition of a metabolic pathway, where does the inhibitor bind?
- to a substrate or the product of the last reaction - to the enzyme of the first reaction - to the enzyme of the last reaction - to the substrate of the first reaction - to the product of the first reaction