You isolate a bacteria strain with modified peptidoglycan tetra peptide. The terminal D-alanine is replace by D-lysine, this does prevent cross-linking from occurring.We expect that organism to be resistant to?
a. penicillin
b. rifampicin
c. vancomycin
d. none of the above
Answer: c. vancomycin
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Why are carbon-based organic compounds, such as C6H12O6 (glucose), often referred to as "energy molecules"? Select all that apply
A. Energy is released when carboncontaining compounds are broken down. B. Energy is stored in carbon-containing organic compounds. C. Energy is required to build carboncontaining organic compounds. D. None of the aboveâ€"carbon-containing organic compounds and energy are not related.
An adaptive radiation may be triggered after the demise of a successful group
a. True b. False
The metabolic processes called fermentation
A. produce substrates for the Citric acid cycle. B. are alternatives for the pentose phosphate pathway. C. use an organic molecule as a final electron acceptor. D. occur only when oxygen is readily available. E. produce substrates for glycolysis.
Nutritionally defective mutants can be detected by the technique of
a. selection. b. transposon mutagenesis. c. replica plating. d. transversion.