As new enzymes are discovered, the EC system for naming enzymes is to be used. The names are to be based on which of the following criteria?
A) the name of the substrate
B) a description of substrate function
C) an indication of the size of the substrate
D) the six major classes of enzyme function
E) the size of the enzyme
D) the six major classes of enzyme function
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Choose the true statements about the evolution of complex characters, such as powered flight.
_____ Phylogenetic analysis using cladistics can help reveal the sequence leading to the evolution of a complex character. _____ Usually a single mutation in one gene leads to the simultaneous appearance of the complex character. _____ Often the initial stage in the evolution of a complex character was an adaptation to some unrelated selection pressure. _____ The intermediate stages in the evolution of a complex character had no fitness advantage.
Ag-Ab binding may result in
A. neutralization. B. immobilization. C. agglutination. D. opsonization. E. All of the choices are correct.
Geographic isolation of populations can generally come about in two ways. What are they?
What will be an ideal response?
Lipids with polar and nonpolar ends are said to be ________.
A. amphibolic B. amphipathic C. bilateral D. None of the choices are correct.