The common cold can be transmitted through a virus left on a door handle by an infected person. This mode of transmission is classified as:

a. respiratory
b. intestinal discharge
c. fomite-borne
d. open lessions


Ans: c. fomite-borne

Biology & Microbiology

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Which of the following is not true of the nucleolytic proofreading reaction of bacterial RNA polymerase?

A. Water is the nucleophile. B. It occurs when the enzyme backtracks after incorporating a mismatched base. C. rNTP is the product. D. It involves the melting of several RNA-DNA base pairs. E. All of the choices given are true.

Biology & Microbiology

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What type of mutation produces no significant change in a functional protein?

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