A Gram-negative bacillus that exhibits strong urease activity is isolated from a patient with a urinary tract infection. Which of the following is a plausible identification for this microbe?

A) E. Coli
B) Proteus mirabilis
C) Salmonella enterica
D) Klebsiella pneumoniae


Answer: B) Proteus mirabilis

Biology & Microbiology

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Although the expression of most genes is tightly regulated, some genes are expressed at roughly constant rates. Which of the following genes would you predict to be constitutively (constantly) expressed?

A) genes involved in the biosynthesis of the amino acid tryptophan B) genes involved in the degradation of tryptophan C) genes involved in the degradation of arabinose, a sugar D) genes that code for regulatory proteins

Biology & Microbiology

The trunk of the body has muscles of all of the

following EXCEPT a. thorax. b. limbs. c. backbone. d. pelvic cavity. e. abdominal wall.

Biology & Microbiology

Name the individual who, while working with the garden pea in the mid-1850s, demonstrated quantitative patterns of heredity and developed a theory involving the behavior of hereditary factors

A) Barbara McClintock B) Walter Sutton C) George Wallace D) Theodor Boveri E) Gregor Mendel

Biology & Microbiology

The organism Phytophthora infestans, responsible for the Irish Potato Famine of 1845 and 1847, belongs to

A. Stramenopila. B. Euglenozoa. C. Alveolata. D. Rhodophyta. E. Chlorophyta.

Biology & Microbiology