80. Which of the following \"chemical reaction/enzyme catalyst\" descriptions ar
ID: 3521173 • Letter: 8
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80. Which of the following "chemical reaction/enzyme catalyst" descriptions are valid or correct? Acetyl-CoCitrate /Citrate Synthase Pruvate +CoASH ? Acetyl-CoA+ ??, / Dranate Dehydrogenase 3. ADP PAdenosine triphosphate / ATP Synthetase 5. 2 PG - Phosphoenolpyruvate/Enolase 6. Dihydroxyacetone phosphate >Glyceraldehyde-3-phosphate / Isomerase (3O) a. 1.2, 3 b. 2,4, 6 c. 1,2, 4, 5 d. 1, 2, 3, 5,6 e. 1,2,3,4, 5,6 81. Where does the Citric Acid (or Kreb's) Cycle occur in the cel? a. Nucleus b. Mitochondrial matrix c. Cytosol e. Cannot be determined 82. Which of the following molecules can be utilized as "metabolic fuel? 1. Glucose 2. Palmitate (a faty acid) 3. 4. Glycine (an amino acid) 5. Acetyl-CoA ine monophosphate (a nucleotide) 6. Ketone bodies a. 1,3,4, 6 b. 1,2,3, 5 c. 2, 4, 5, 6 d. 1, 4, 5 e. All of the above 83. By far, the most important chemical buffer system overall in the body is the system because it can be regulated or controlled. a. Bicarbonate (HC0) ions b. Plasma proteins c. Monohydrogen phosphate (HPO) ions d. All of the above e. both a &c; 84. Which of the following is a function of Urinary System? 1. synthesis of Vitamin D 4. control of blood pressure 2. maintenance of erythrocyte concentration 5. regulation of body pH 3. elimination of solid wastes 6. storage& excretion of liquid wastes a. 1,3, 5 b. 2,4,6 c. 2,3, 5,6 d. 1,2, 4,5, 6 e. 1,2,3, 4, 5, 6Explanation / Answer
80.Ans.Option(d)1,2,3,5,6.
Citrate synthase catalyzes the condensation reaction of the 2C acetate residue from acetyl coenzyme A and a molecule of 4C oxaloacetate to form the 6C citrate
acetyl-CoA + oxaloacetate + H2O ? citrate + CoA-SH.
The conversion of glucose-6-phosphate to fructose-6-phosphate occurs with the help of the enzyme phosphoglucose isomerase (PI).Here the option is not correct.
Enolase, also known as phosphopyruvate hydratase, is a metalloenzyme responsible for the catalysis of the conversion of 2-phosphoglycerate (2-PG) to phosphoenolpyruvate.
Dihydroxyacetone phosphate is one of the two products of breakdown of fructose 1,6-bisphosphate, along with glyceraldehyde 3-phosphate in glycolysis pathway. It is rapidly and reversibly isomerised to glyceraldehyde 3-phosphate by triose phosphate isomerase.
Mitochondrial pyruvate dehydrogenase complex catalyzes the reaction of pyruvate, CoASH, and NAD+ to form acetylCoA, CO2, and NADH + H+.
Adenosine diphosphate + inorganic Phosphate + energy produces Adenosine Triphosphate.
81.ans.B.The Krebs cycle occurs in the mitochondrial matrix and generates ATP, NADH, and FADH2 following oxidation of pyruvate,which the end product of glycolysis.
82.Ans.e.All the above examples can be utilized as a metabolic fuel.
83.Ans.a.The body's chemical buffer system consists of three individual buffers out of which the carbonic acid bicarbonate buffer is the most important.Cellular respiration produces carbon dioxide as a waste product. This is immediately converted to bicarbonate ion in the blood.
84.Ans.e.
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