Thick protein filaments in muscle contain
A. actin.
B. malleus.
C. axon.
D. myosin.
D. myosin.
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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
Transposable elements have been found only in prokaryotes and do not appear to play a major role in eukaryotes.
Answer the following statement true (T) or false (F)
Which of the following is LEAST likely required for the digestion of a meal?
A. molecules B. cells C. tissues D. organs E. populations
What is the role of the oxygen molecules required for aerobic respiration?
a. To form ATP b. To produce CO2 c. To accept electrons directly from either NADH or FADH2 d. To accept the low energy electrons at the end of the electron transport chain e. To store high energy electrons to pass to complex I of the electron transport chain