Studies of arginine biosynthesis in mutant stains of Neurospora provided evidence of a direct relationship between genes and enzymes, including development of the one gene-one enzyme hypothesis. Who conducted these studies?
a. Archibald Garrod
b. Watson and Crick
c. Beadle and Tatum
d. Frederick Griffith
Ans: c. Beadle and Tatum
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Which of the following is NOT characteristic of a coliform?
A) facultatively aerobic B) gram-negative C) rod shaped D) resistant to chlorination
If a reaction absorbs free energy it is termed which of the following?
a. exergonic reaction b. endergonic reaction c. metabolic reaction d. bioenergetic reaction
Sequencing the human genome was possible with the use of ____ sequencing methods
a. automated b. mRNA c. electrophoretic d. international e. patented
Which of the following factors does not affect the efficiency of a germicide?
A) how the object is used B) what infectious agents are most likely present C) the number of microbes to be killed D) the presence of excessive organic substances like blood, soil, or fecal matter E) the presence of excessive inorganic substances like minerals and salts in hard water