OH CH ?.PO OH What is the function of the molecule shown above? A. dehydrogenase

Question

OH CH ?.PO OH What is the function of the molecule shown above? A. dehydrogenase cosubstrate B. second messenger C. electron acceptor D. transfer of phosphoryl groups E. transfer of acyl groups Phoshorylation reactions that use ATP as a substrate are catalyzed by A. kinases B. phosphoryl isomerases C. phosphatases D. hydrolases E. phospholipases The coenzyme NAD+ is partly derived from what vitamin? A. vitamin C (ascorbic acid) B. riboflavin (vitamin B2) C. vitamin D D. folic acid E. niacin (nicotinic acid) The hydrolysis of ATP to ADP (ATP ADP P) has a AG of -30 kJ/mol (-30,000 J/mol). In rat hepatocytes (liver cells), the concentration of ATP 3.4 mM, ADP 1.3 mM, and P4.8 mM What is the actual free energy change (AG) for ATP hydrolysis in these cells? (Assume a temperature of 298 K) A. +1050 kJ/mol B. +30 kJ/mol C. -46 kJ/mol D. - 15 kJ/mol E. 0 kJ/mol The biochemical reactions that degrade molecules such as nutrients are called: A. anobolic reactions B. amphibolic reactions C. amphipathic reactions D. catabolic reactions E. near-equilibrium reactions

Explanation / Answer

C, electron acceptor, has an SH group-

Kinases, they add a phosphate group.

Niacin, the are derived from Vitamin B3.

Catabolic reactions degrade molecules using enzymes.

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