51. THE ONLY INTERMEDIATE IN THE CITRIC ACID CYCLE WHICH HAVE FIVE CARBON? A. OXALOACETATE  B. ALPHA-KETOGLUTARATE C. SUCCINATE D. ISOCITRATE 52. THE RATE AT WHICH CITRIC ACID CYCLE OPERATES IS/ARE CONTROLLED BY WHICH OF THE FOLLOWING? A. ATP & NADH LEVELS B. FADH2 & NADH LEVELS  C. AMP & ATP LEVELS  D. ATP & GTP LEVELS 53. CITRIC ACID CYCLEOR THE KREB'S CYCLE IS WHAT TYPE OF METABOLIC PATHWAY?

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A:

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Metabolic pathways

Metabolism is defined as the group of life-supporting, enzyme-mediated chemical reactions in organisms. A metabolic pathway is a set of these chemical reactions that involve anabolism (synthesis of complex biomolecules) and catabolism (breakdown of biomolecules into small molecules) that occur inside a cell. Metabolites are the reacting substances, products, and intermediate substances of an enzymatic process that are altered by a series of chemical events catalyzed by enzymes.