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
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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
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.
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
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.