Which of the following regarding antimicrobial control agents is FALSE?
A) Contaminating organic debris such as blood or sputum will decrease effectiveness.
B) Some agents kill by denaturing microbial cell proteins.
C) Some agents affect microbial cell membranes by dissolving lipids.
D) Some agents are utilized as both an antiseptic and a disinfectant.
E) A true antimicrobial control agent is equally effective against both bacteria and viruses.
E
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Transcription factors generally "read" DNA sequences through amino acid–nucleotide contacts in the major groove because:
A. there are no minor groove hydrogen bond acceptors available at A–T base pairs. B. the minor groove displays only methyl functional groups for recognition. C. there are more hydrogen bond donors and acceptors in the major groove. D. all minor groove functional groups are the same.
What element is in the cell walls of grasses and horsetails, which gives them such a sharp, cutting edge, like a piece of glass?
a. carbon b. silicon c. chlorine d. boron e. nitrogen
Fungal spores are usually responsible for the bright colors and fluffy textures of the molds that produce them.
Answer the following statement true (T) or false (F)
Bordetella pertussis produces
A) dermonecrotic toxin. B) adenylate cyclase toxin. C) pyrogenic toxin. D) dermonecrotic and adenylate cyclase toxins. E) dermonecrotic, adenylate cyclase, and pyrogenic toxins.