Which of the following is not a B-lacUmase rmumi ptmdllin? Oxacillin Ampicillin

Question

Which of the following is not a B-lacUmase rmumi ptmdllin? Oxacillin Ampicillin Nafcillin Dicloxacillin All of the above arc li-lactamase resistant Peptone refers to a hydrolysatc of carbohydrates uxxl in growth media. refers to a hydrolysate of proteins used in growth media. consists of a water extract of beef. consists of a mix of monosacchandcs and oligosaccharides. a and b Candle jars are usually used to store candles. provide an atmosphere with increased CO_2. provide an environment for the growth of obligate anaerobes. prevent the growth of obligate aerobes. stimulate the growth of Treponema pallidu Which of the following is not true of viral replication? in the entry phase of viruses, phages inject the nucleic acid and the capsid stays outside in the entry phase of viruses, animal virus capsids enter by cndocytosis or fusion . in the uncoating step of viruses, uncoaiing is not required of phages. spikes and tail fibers (if present) are often associated with attachment of the vims. in the uncoaling step of viruses, there is enzymatic removal of capsid proteins and the capsid outside of animal cells prior to entry of animal virus nucleic acid. In the growth curv e of a bacterial population, the bacteria are most susceptible to antibiotics and other inhibitors in the lag phase. exponential (log) phase. stationary phase. decline (death) phase. they arc equally susceptible in all phases of growth. Which of the following is not tnie concerning the use of metals as agents to control microbes? before modem medicine mercury was often used silver+sulfadiazinc is used as a crcam on bums copper sulfate is used as an algicidc silver nitrate drops have been used to prevent eye infection of the newborn by the gonococcus all of them above arc true

Explanation / Answer

C. Nafcillin

Nafcillin is beta lactamase resistant penicillin. Beta lactamase is an enzyme produced by certain organisms that breakdown the beta alctum ring of the penicillins, and inactivates the drug. Some examples of beta lactamase resistant penicillins include, methicillin, cloxacillin, flucoloxacillin and nafcillin.

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