Which of these methods can be used to determine the number of viable microorganisms in a sample?
A. Counting a known volume of cells in a hemocytometer
B. Measuring colony forming units per ml
C. Measuring total cell mass
D. Light scattering in a spectrophotometer
Answer: B
You might also like to view...
Which one of the following macronutrients stores the most amount of energy per gram?
a. fats b. carbohydrates c. nucleic acids d. proteins
The process of using just enough heat to kill most (but not all) of the bacteria that cause spoilage in a beverage was developed by
a) Pasteur. b) Ehrlich. c) Lister. d) Koch.
The finding that some phage genes have multiple initiation sites is evidence against what characteristic of the genetic code?
A) The genetic code is nonoverlapping. B) The genetic code is commaless. C) The genetic code is universal. D) The genetic code is unambiguous. E) The genetic code is a triplet code.
The scientific study of life is called
A. biochemistry. B. ecology. C. anatomy. D. biology. E. limnology.