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(a)
Interpretation: To draw the structural formula for oxaloacetic acid.
Concept introduction: There are a number of
Polyfunctional carboxylate ions act as a substrate in the metabolic pathways and can be divided into two parts depending upon the parent
Oxaloacetic acid is an unsaturated derivative of succinic acid. The structure of succinic acid is:
(b)
Interpretation: To draw the structural formula for oxaloacetate ion.
Concept introduction: There are a number of metabolic reaction that occur in the human body for completion of functions. During these metabolic reactions, the various metabolic intermediates are formed for the short time to complete the reactions. Polyfunctional carboxylate ions are also the metabolic intermediate formed during metabolic pathways.
Polyfunctional carboxylate ions act as a substrate in the metabolic pathways and can be divided into two parts depending upon the parent carboxylic acid. The first class consists of malate, oxaloacetate and fumarate ion which are derivative of succinic acid.
(c)
Interpretation: To draw the structural formula for citric acid.
Concept introduction: There are a number of metabolic reaction that occur in the human body for completion of functions. During these metabolic reactions, the various metabolic intermediates are formed for the short time to complete the reactions. Polyfunctional carboxylate ions are also the metabolic intermediate formed during metabolic pathways.
Polyfunctional carboxylate ions act as a substrate in the metabolic pathways and can be divided into two parts depending upon the parent carboxylic acid. The second class consists of
Citric acid is an unsaturated derivative of glutaric acid. The structure of glutaric acid is:
(d)
Interpretation: To draw the structural formula for citrate ion.
Concept introduction: There are a number of metabolic reaction that occur in the human body for completion of functions. During these metabolic reactions, the various metabolic intermediates are formed for the short time to complete the reactions. Polyfunctional carboxylate ions are also the metabolic intermediate formed during metabolic pathways.
Polyfunctional carboxylate ions act as a substrate in the metabolic pathways and can be divided into two parts depending upon the parent carboxylic acid. The second class consists of
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Chapter 23 Solutions
EBK GENERAL, ORGANIC, AND BIOLOGICAL CH
- Glycine hydrochloride (Cl− H3N+CH2COOH) is a diprotic acid that contains a carboxylic acid group and an ammonium group and is therefore called an amino acid. It is often used in biochemical buffers. Solve, In analogy with Figure , sketch the titration curve of this diprotic acid.arrow_forwardSalicylic acid (o-hydroxybenzoic acid) is used as starting material to prepare aspirin. Draw the structure of salicylic acid.arrow_forwardIdentify the conjugate acid-base pairs in the following reactions: HNO2(aq) + H2O(l) → NO2 – (aq) + H3O+(aq) _______ ______ _________ ________ CH3NH2 + H2O(l) → CH3NH3+ + OH – _______ ________ ________ _________arrow_forward
- Trans-oleic acid (18:1,D9) has a melting temperature of (44.5C) and cis-oleic acid (18:1,D9) has a melting point of (13.4C). Briefly explain the difference in melting points between the two.arrow_forwardWrite the chemical formula of the conjugate base of boric acid.arrow_forwardHistidine has three ionizable groups. On the titration curve below, show: a) 2 molar equivalents of OH b) pka of the third ionizable group Histidine Titration 12.0 10.0 8.0 4 pH 6.0 4.0 2.0 0.0 Equivalents OHarrow_forward
- Draw structural formulas for all of the following. Q.) Alcohols with the molecular formula C4H10Oarrow_forwardGiven Raffinose, Briefly explain its expected reaction (based on their structural formula) to the different qualitative tests for carbohydrates which are: (a) Molisch’s test (b)Fehling’s test (c) Bial’s testarrow_forwardDescribe any two heteropolysaccharides in terms of: a. The types of monosaccharides involved b. types of glycosidic linkages, and c. possible hydrolysatesarrow_forward
- The ionization of p-nitrophenol is shown below (pKa = 7.0): a. Identify the weak acid and conjugate base. b. At pH 7, what are the relative concentrations of ionized and un-ionized p-nitrophenol? c. If enough concentrated hydrochloric acid is added to a solution of p-nitrophenol to lower the pH from 7 to 5, what will happen to the relative concentrations of the ionized and un-ionized forms? d. Ionized p-nitrophenol has a yellow color, while the un-ionized form is colorless. The yellow color can be measured using a spectrophotometer at 400nm. In order to determine the total amount of p-nitrophenol in a solution, would you perform the spectrophotometer reading at an acidic or basic pH? Clearly explain why? e. A solution of p-nitrophenol at pH 7.95 was found to have an A400 of 0.255 . What is the total concentration (in µM) of p-nitrophenol (ionized plus un-ionized) in the solution? The molar extinction coefficient of p-nitrophenol is 18,500 M-1cm-1 and the pKa is 7.arrow_forwardGiven Sorbitol, Briefly explain its expected reaction (based on their structural formula) to the different qualitative tests for carbohydrates which are: (a) Molisch’s test (b)Fehling’s test (c) Bial’s testarrow_forwardExamine the structures of the following molecules. In each compound circle and identify by name each functional group. a) ethanolamine b) Glucosamine c) Threonine H₂N-C-C-OH H₂ H₂ H₂N HO OH d) Phosphoenolpyruvate с H₂N-CH OH OH OH HC - OH 1 CH3 OH T O=P-O O H₂C=C-C OHarrow_forward
