QUESTION 10 Which of the statements below regarding the metabolic fate of acetyl CoA is false? a) Acetyl CoA is catabolized through the citric acid cycle when the cell is in a low energy charge state. b) Acetyl CoA is used to form fatty acids when the cell is in a high energy charge state. c) Acetyl CoA is used to form cholesterol. d) Acetyl CoA can be used to form pyruvate when glucose intake is low, the pyruvate is then metabolized to glucose through gluconeogenesis. e) All of the above are metabolic fates of acetyl CoA. QUESTION 11 Which of the following is not a metabolic fate for glucose-6-phosphate? a) Glucose-6-phosphate can be metabolized to ribose-5-phosphate. b) Glucose-6-phosphate can be metabolized to pyruvate. c) Glucose-6-phosphate can be metabolized to glycogen. d) All of the above metabolic fates of glucose-6-phosphate are true. e) a and b
Enzyme kinetics
In biochemistry, enzymes are proteins that act as biological catalysts. Catalysis is the addition of a catalyst to a chemical reaction to speed up the pace of the reaction. Catalysis can be categorized as either homogeneous or heterogeneous, depending on whether the catalysts are distributed in the same phase as that of the reactants. Enzymes are an essential part of the cell because, without them, many organic processes would slow down and thus will affect the processes that are important for cell survival and sustenance.
Regulation of Enzymes
A substance that acts as a catalyst to regulate the reaction rate in the living organism's metabolic pathways without itself getting altered is an enzyme. Most of the biological reactions and metabolic pathways in the living systems are carried out by enzymes. They are specific for their works and work in particular conditions. It maintains the best possible rate of reaction in the most stable state. The enzymes have distinct properties as they can proceed with the reaction in any direction, their particular binding sites, pH specificity, temperature specificity required in very few amounts.
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