Nucleophilic attack:
A. is carried out by a strongly electronegative atom such as carbon or hydrogen.
B. can result in the formation of the transition state of the reaction.
C. by an OH (hydroxyl) group on an inorganic phosphate molecule can cause hydrolysis of a chemical bond.
D. occurs when a weakly electronegative atom attacks a strongly electronegative atom.
E. never forms bonds between reactants and the enzyme active site.
B
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Which of the following reduces gene flow between the gene pools of the two species on Sao Tomé, despite the existence of hybrids?
A) gametic isolation B) reduced hybrid viability C) hybrid sterility D) temporal isolation E) a geographic barrier
All of the following contain complete proteins EXCEPT
A. beans. B. milk. C. eggs. D. fish.
Which of the following molecules is not produced during the breakdown of phospholipids?
A) glucose B) glycerol C) acetyl groups D) fatty acids
Which of the following mechanisms can alter allele frequencies?
a. Genetic drift b. Natural selection c. Gene flow d. All of the listed responses are correct. e. None of the listed responses are correct.