721. When the prosthetic group of an enzyme is an inorganic ion, it is called a_____________?
A. Cofactor
B. Coenzyme
C. Apoenzyme
D. Holoenzyme

722. Coenzyme, in an enzymatic reaction usually functions to_____________?
A. Activate the substrate
B. Increase the active sites of apoenzyme
C. Enhance the specificity of apoenzyme
D. Accept one of the cleavage products

723. Enzymes involved in degradation of epinephrine_____________?
A. Cholinesterase
B. Anticholinesterases
C. Catechol 0-transferase
D. Oxidases

724. Muscle glycogen cannot contribute directly to blood glucose level because___________?
A. Muscle lacks glucose 6 phosphatase
B. Muscle lacks phosphogluco isomerase
C. Absence of glucokinase
D. Muscle does not contain glycogen phosphorylase

725. The main site of fluoride inhibition in the Embden Meyerhof pathway of acid____________?
A. ATPase
B. Enolase
C. Pyruvate Kinase
D. Fructose 6 phosphatase

726. The activity of the following enzyme is affected by biotin deficiency____________?
A. Transketolase
B. Dehydrogenase
C. Oxidase
D. Carboxylase

727. The deficiency of thiamine can be identified by measuring the red cell______________?
A. Transketolase
B. Transaldolase
C. Alpha ketoglutarate dehydrogenase
D. Pyruvate dehydrogenase

728. Competitive enzyme inhibition will cause_____________?

A. Decrease of km and increase of Vmax
B. increase of km and increase of Vmax
C. Decrease of km and decrease of Vmax
D. Increase of km and Unchanged of Vmax

729. Which of the following is correct of the pyruvate dehydrogenase enzyme complex ?
A. It is present in cytoplasm
B. Catalyzes the conversion of pyruvate to oxaloacetate
C. Requires TPP as cofactor
D. Catalyzes a reversible reaction

730. Dehydrogenase used as coenzymes all of the following, except________________?
D. Ferro protoporphyrin