Which of the following produces the most ATP when glucose (C6H12O6) is completely oxidized to carbon dioxide (CO2) and water?
A) glycolysis
B) fermentation
C) oxidation of pyruvate to acetyl CoA
D) citric acid cycle
E) oxidative phosphorylation (chemiosmosis)
Ans: E) oxidative phosphorylation (chemiosmosis)
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Tacrolimus (FK-506) is a drug that inhibits an enzyme called calcineurin. Calcineurin is a protein phosphatase. This is an enzyme that dephosphorylates (removes phosphate groups) from proteins. When added to cells, tacrolimus can inhibit the dephosphorylation of a protein called NFAT, but it cannot prevent the dephosphorylation of a protein called CDK1 . What is the most likely explanation for
this finding? A. Calcineurin requires an additional cofactor to dephosphorylate NFAT B. NFAT is a substrate of calcineurin, but CDK1 is not C. Tacrolimus is a competitive inhibitor of calcineurin for NFAT and CDK11 D. Tacrolimus changes the optimum pH for calcineurin
Mutants of Drosophila melanogaster have been used extensively to explore the genetic control of early development,x
particularly the hierarchical control of development, which means that genes expressed at each stage control the expression of genes that act later. A. true B. false
The Casparian strip is associated with the
a. epidermis. b. vascular tissue. c. cortex. d. root hairs. e. endodermis
The genetic makeup of an organism is its
a. phenotype. b. genotype. c. locus. d. gamete.