Which organism is catalase positive, coagulase negative, pyrrolidonyl arylamidase (PYR) positive, susceptible to novobiocin, urease negative, and hemolytic on sheep blood agar?
a. S. epidermidis
b. S. saprophyticus
c. S. cohnii
d. S. haemolyticus
D
The characteristics in question 15 refer to S. haemolyticus. It is also the only hemolytic Sta-phylococcus listed.
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The active site for carboxypeptidase
A) contains amino acids that are contiguous to one another along the primary sequence of the protein. B) uses iron as the prosthetic group. C) involves only 6 out of a total of 307 amino acids. D) contains a glutamate residue at position 69. E) is formed by the interaction of two polypeptide chains.
Fossil evidence of ____ would be found in the deepest layers of Earth
a. dinosaur b. monkeys c. frogs d. bacteria e. human
Which of the following is NOT a fruit?
Select one: a. corn kernel b. peas and beans c. tomato d. cucumber e. onion
Lichens are a symbiotic relationship between which of the following?
a) a fungus and a liverwort b) a fungus and a moss c) two species of algae d) a fungus and algae e) two species of fungi