NADH concentrations serve to regulate oxidative decarboxylation and the TCA cycle. Which of the following enzymes is not regulated by NADH?
A) pyruvate dehydrogenase
B) isocitrate dehydrogenase
C) ?-ketoglutarate dehydrogenase
D) malate dehydrogenase
E) succinate dehydrogenase
E) succinate dehydrogenase
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The wide variety of finches Darwin observed in the Galàpagos was thought provoking to him because they appeared to have descended from __________ population. Today we regard this as an example of ___________
A. the same; adaptive radiation B. more than one; convergent evolution C. the same; convergent evolution D. more than one; adaptive radiation
The amino acids valine and threonine differ only by the presence of a hydroxyl group or a methyl group
The aminoacyl-tRNA synthetases for tRNAVal and tRNAThr must discriminate between using these two very structurally similar amino acids as substrate for creating charged tRNAs. The discrimination by the Valyl-tRNA synthetase is by differential binding of valine and/or threonine to a first site on the synthetase and, then, differential binding to a second site on the synthetase. This is an example of what known process in the specificity of tRNA synthetases? A. adenylation B. kinetic proofreading C. wobble D. premature termination E. accommodation
Heritable changes in gene expression not due to changes in DNA sequences are known as _____
a. epigenetics b. methylation c. translational mutation d. differentiation e. frameshift inheritance
The composition of lipids in the outer and inner monolayers of cell membrane lipid bilayers is:
What will be an ideal response?