Author: Anonymous

When an inhibitor binds to an enzyme at site other than at  where the substrate is bound, it is known as:

Each of the following enzymes maybe used for glucose measurement.  Which one produces hydrogen peroxide?

Increasing levels of hemoglobin AIc have been associated with:

Which of the following leukemias is characterized by immature cells that show some myeloperoxidase positivity, show alpha napthyl esterase positive.

Shigella sonnei is determined to be the causative agent of an outbreak of gastro-intestinal disease.  Which situation below would most likely be associated with this outbreak?

India Ink method is used to stain which cell structure?

Klebsiella sp. and Enterobacter sp. are very similar in biochemical reactions but may be differentiated on the basis of motility.  Which of the following is true?

Aspirin has what effect on hemostasis? interferes with platelet adherence interferes with ADP release interferes with secondary platelet aggregation interferes with clot retraction

A direct smear on an endocervical specimen revealed intracellular gram-negative, kidney-bean-shaped diplococci.  The specimen was inoculated onto a Modified Thayer-Martin (MTM) Agar plate, and after 24-hours incubation under CO2, grayish-white, translucent, glistening colonies resembling gonococci were observed.  The technologist subcultured the colony to chocolate agar.  Growth from the chocolate agar was used to perform Cysteine Tryptic digest Agar (CTA) carbohydrate utilization tests with glucose, maltose, sucrose, lactose and fructose.  After 24 hours incubation the technologist saw that both glucose and maltose had been degraded.  What is the best next step?

Source: sputum; small grayish-white colonies on BAP,gram positive cocci, that is catalase, bacitracin and optochin disc  and bile esculin negative.  It doesn’t grow in 6.5% NACl broth and is PYR negative. Choose the best answer: