The following is true of quarternary ammonium compounds EXCEPT
A) they are non-toxic at lower concentrations.
B) they are tasteless.
C) they are effective when combined with soaps.
D) they are stable.
E) they may be an ingredient in mouthwash.
C
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When atoms gain or lose electrons, they become negatively or positively charged. These negatively or positively charged atoms are known as
A. isotopes. B. ions. C. isomers. D. unstable atoms.
Adding a fibrinogen inactivator to blood would:a
prevent the formation of thrombin. b. prevent platelet formation. c. prevent the blood from clotting. d. prevent constriction of the blood vessels. e. prevent hemoglobin synthesis.
Mosses have ____.
A. xylem B. lignin C. true stems D. rhizoids E. independent sporophytes
The chemical 5-bromouracil mimics the chemical structure of thymine, making it a(n) (analog/nucleotide/precursor) of thymine
What will be an ideal response?