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Concept explainers
(a)
Interpretation: The biochemical relationship between vitamin C and collagen has to be stated.
Concept introduction: Vitamin C is the water soluble vitamins. They have the simplest structure. It doesnot serve as precursor for enzyme cofactors.
(b)
Interpretation: The biochemical relationship between vitamin C and vitamin E has to be stated.
Concept introduction: Vitamin C is the water soluble vitamins. They have the simplest structure. It doesnot serve as precursor for enzyme cofactors.
(c)
Interpretation: The biochemical relationship between vitamin C and dopamine has to be stated.
Concept introduction: Vitamin C is the water soluble vitamins. They have the simplest structure. It doesnot serve as precursor for enzyme cofactors.
(d)
Interpretation: The biochemical relationship between vitamin C and niacin (NADH) has to be stated.
Concept introduction: Vitamin C is the water soluble vitamins. They have the simplest structure. It does not serve as precursor for enzyme cofactors.
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Chapter 21 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- Which of the following statements concerning ATP is true? a. The free energy value for the hydrolysis of ATP is nearly the same for ADP. b. The free energy value for the hydrolysis of ATP is greater than that for ADP. c. ATP hydrolysis is more likely at pH 5 than at pH 7. d. One mole of glycerate-1,3-bisphosphate can phosphorylate one mole of AMP to yield ATP.arrow_forwardWhich of the following is NOT a physiological role of phosphorus? Select one: a. Required for ossification of bones during embryonic development b. Required for enzymatic conversions in glycolysis c. Links together ribose sugars and their associated nitrogenous bases d. Important compound required to inhibit auto-oxidation of fatty acidsarrow_forwardWhich of the following statements about folic acid is not true? a. Folic acid is activated by folate synthase. b. Folic acid structure contains a pteridine ring and para-amino benzoic acid. c. NADPH is required in the reactions activating folic acid. d. Tetrahydrofolate is the biologically active derivative of folic acid.arrow_forward
- The conversion of citrate to isocitrate is catalyzed by an enzyme classified as a(n): a. Hydrolase b. Oxidoreductase OC. Isomerase Od. Transferasearrow_forwardAmong the given statements, which ones are correct about the biological functions and commercial uses of carbohydrates? A. Glucose serves as the substrate for photosynthesis in plants. B. Glycogen serves as repository of glucose in the myocytes. C. The cell wall of plants is reinforced by a polymer of beta-D-glucose. D. Lactose is widely used as filler in tablets and capsules in the pharmaceutical industry. E. Corn extract is commercially hydrolyzed to yield fructose-rich sweetener.arrow_forwardDetermine whether the following reactions will proceed favorably or spontaneously. A. fructose-6-phosphate + ATP → fructose-1,6-diphosphate B. glycerol phosphate + ADP → glycerol + ATP C. phosphocreatine + ADP → creatine + ATParrow_forward
- Among the given statements, which ones are correct about the biological functions and commercial uses of carbohydrates? A. Glucose serves as the substrate for photosynthesis in plants. B. Glycogen serves as a repository of glucose in the myocytes. C. The cell wall of plants is reinforced by a polymer of beta-D-glucose. D. Lactose is widely used as filler in tablets and capsules in the pharmaceutical industry. E. Corn extract is commercially hydrolyzed to yield fructose-rich sweeteners.arrow_forwardWhat is the activated reactant in the biosynthesis of each of the following compounds? a. Phosphoribosylamine c. Orotidylate (from orotate) b. Carbamoylaspartate d. Phosphoribosylanthranilatearrow_forwardWhich of the following is true?a. Triglycerides have the least energy content per gram of the three majorenergy sources in the body.b. Fat catabolism generates new triglycerides for storage in adipose tissue.c. By mass, the total-body content of carbohydrates exceeds that of total triglycerides.d. Catabolism of fatty acids occurs in two-carbon steps.e. Triglycerides are the major lipids found in plasma membranesarrow_forward
- The characteristics of vitamin P include the followings except: Select one: a. Vitamin P acts synergistically with ascorbic acid b. It reduces the level of hyaluronidase which prevents the oxidation of ascorbic acid and adrenaline, as result it increases the strength of the blood vessels and capillaries c. It increases the capillary fragility and their permeability d. It is related to flavonoids and phenolic compoundsarrow_forwardWhich one of the following compounds cannot give rise to the net synthesis of Glucose? a. Lactate b. Alanine c. Glycerol d. Acetyl CoAarrow_forwardIdentify the following: a. An oxidative process that releases energy b. Cellular localization of the electron transport chain during cellular respiration. c. The number of double bonds present in the metabolic precursor of all prostaglandins.arrow_forward
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