The bacterial genus Bacillus can utilize starch as a nutrient by splitting the starch molecule into smaller molecules of glucose with the addition of water. The enzymes to do this would be classified as ________.
A. isomerases
B. ligases
C. hydrolases
D. transferases
E. oxidoreductases
Answer: C
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Biochemical tests are no longer very important for the identification of enteric bacteria.
Answer the following statement true (T) or false (F)
Pepsinogen catalyzes the hydrolysis of proteins to short polypeptides
____________________ Indicate whether the statement is true or false.
Which of the following statements is true?
a. Presently, extinctions are occurring at a very slow pace. b. Mutations, both contemporary and prehistoric, have been the single greatest cause of extinctions. c. The fossil record indicates that there has been very little animal extinction until recently. d. Evolutionary history is often represented by extinctions. e. Organisms compete for limited resources in all environments, possibly leading to extinctions of some.
Based on the classic experiments of Creighton and McClintock with maize, crossing over involves a physical exchange between chromatids. What particular chromosomal characteristic allowed their experiments to succeed?
A) colored bands along the lengths of a chromosome B) a chromosome with a unique cytological marker C) a missing chromosome D) an extra chromosome E) three chromosomes with identical structure