2. Which of the following is a protein synthesized at specific times during the cell cycle that associates with a
kinase to form a catalytically active complex?
(A) PDGF (B) MPF (C) protein kinase (D) cyclin
34. Processing of filtrate in the proximal and distal tubules accomplishes what important function?
(A) sorting plasma proteins according to size
(B) converting toxic ammonia to less toxic urea
(C) maintaining a constant pH in body fluids
(D) regulating the speed of blood flow through the nephron
7. During the redox reaction in glycolysis, ______ acts as the oxidizing agent and ______ acts as the reducing agent.
(A)glyceraldehyde 3-phosphate, NADH
(B)glyceraldehyde 3-phosphate, NAD+
(C)NADH, glyceraldehyde 3-phosphate
(D) NAD+, glyceraldehyde 3-phosphate
(E)pyruvate, phosphoenolpyruvate