Aminoacyl-tRNA synthetases catalyze covalent addition of ________ ________ to tRNAs.
Fill in the blank(s) with the appropriate word(s).
amino acids
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By using simple microscopy techniques, it is possible to determine if a culture is contaminated with another organism
Indicate whether the statement is true or false.
Gibbs free energy is defined as ________
A. the amount of energy available to do work B. the amount of energy lost as heat C. the amount of entropy D. the amount of potential energy in a system E. spontaneous energy
HEPA filters are used to remove microbes from
A. air. B. liquids. C. medical instruments. D. human tissues. E. All of the choices are correct.
A technique that uses comparisons of many characteristics to help determine phylogenetic relationships is
A. phylogeny. B. DNA analysis. C. cladistics. D. binomial nomenclature.