A urine Gram stain shows Gram positive cocci in clusters. The organisms tested catalase positive microdase negative. To speciate this organism from culture, the technicial should perform a coagulase test and a/an:

A. Oxidase
B. Novobiocin susceptibility
C. Polymyxin B susceptibility
D. P Disk


Ans: B. Novobiocin susceptibility

Biology & Microbiology

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Substitution of one base pair for another in a coding region of a gene can result in a ____ mutation

where the changed codon still codes for the same amino acid that was previously coded for.

a. missense b. chromosomal c. frameshift d. silent e. nonsense

Biology & Microbiology

In the reactions of glycolysis, pyruvate oxidation, and the citric acid cycle, chemical energy is transferred to the bonds in:

a. ATP b. All of these choices are correct. c. fats d. electron carriers e. c and d f. a and d

Biology & Microbiology

If two parents are carriers of albinism (an autosomal recessive trait), what is the chance that their fourth child will have a homozygous dominant genotype?

A) 75% B) 25% C) 0% D) 50% E) 100%

Biology & Microbiology

What would be strong evidence to suggest a protist is phototrophic?

A. Many lysosomes B. Silicon dioxide cell walls C. Locomotion via several flagella D. The presence of chloroplasts E. A benthic lifestyle

Biology & Microbiology