The chemical found in tears and saliva that hydrolyzes the peptidoglycan in certain bacterial cell walls is ________.

A. hydrochloric acid
B. histamine
C. bile
D. lysozyme
E. lactic acid


Answer: D

Biology & Microbiology

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A staphylococcal isolate that gives a negative result using the Cefinase disk and tests resistant to penicillin by disk diffusion means that:

a. the isolate may contain the mecA gene. b. the bacteria produce the lactamase en-zyme. c. the isolate is also resistant to ampicillin, carbenicillin, ticarcillin, and imipenem. d. the isolate is also resistant to oxacillin, cefoxitin, and ticarcillin-clavulanate.

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Which would create a more acute dietary shortage for human beings - the loss of monocot crops or the

loss of dicot crops? What will be an ideal response?

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A properly designed controlled experiment should include both a(n) ________ group and a(n) ________ group

Fill in the blank(s) with correct word

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Which type of light is not absorbed strongly by photosynthetic pigments?

a) Far-red b) Blue c) Red

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