Fundamentals of General, Organic, and Biological Chemistry 7th. Edition by John E. McMurry, Carl A. Hoeger, Virginia E. Peterson, David S. Ballantine | 9780321750839 | 0321750837 | Holooly

Organic Chemistry, Biological Chemistry, General Chemistry

Fundamentals of General, Organic, and Biological Chemistry

227 SOLVED PROBLEMS

Question: 23.2

Comparing Melting Points Which of these two fatty acids has the higher melting point? ...

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Molecule (a) has 18 carbon atoms and two unsaturat...

Question: 21.3

Converting Fisher Projections to Cyclic Hemiacetals The open-chain form of D-altrose, an aldohexose isomer of glucose, has the following structure. Draw D-altrose in its cyclic hemiacetal form: ...

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First, coil D-altrose into a circular shape by men...

Question: 21.2

Identifying D and L Isomers Identify the following monosaccharides as (a) D-ribose or L-ribose, (b) D-mannose or L-mannose. ...

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In (a) the —OH group on the chiral carbon above th...

Question: 19.5

Determining Feedback Control Points Look at the three-step pathway for the conversion of 3-phosphoglycerate to serine: 3-phosphoglycerate → 3-phosphohydroxypyruvate → 3-phosphoserine → serine When the cell has plenty of serine available, which enzyme in the pathway, 1, 2, or 3, is most likely to be ...

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Assuming that feedback control is the simplest con...

Question: 19.4

Enzymatic Activity: Determining Optimum Temperature Consider the temperature activity curve below. Enzymatic activity is shown for muscle lactate dehydrogenase from 0 °C to 60 °C. Suppose you wish to test a sample for lactate dehydrogenase activity; what is the best temperature for the test? ...

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From the highest point on the curve of activity ve...

Question: 19.3

Enzymatic Activity: Determining Optimum pH Enzymatic activity is shown for three different enzymes as a function of pH in the graph below. What is the optimum pH for pepsin (curve A), for urease (curve B), and for alanine dehydrogenase (curve C)? ANALYSIS Recall that the optimum pH is the pH at ...

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Find the correct curve for each enzyme, then find ...

Question: 19.2

Identifying active site side-chain functions Look at the hydrolysis of a peptide bond by chymotrypsin in Figure 19.4. (a) Which amino acids have side chains that could provide stabilization to the aromatic ring shown in the substrate? (b) What does the serine side chain do in the reaction and why ...

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(a) Any of the following nonpolar amino acids coul...

Question: 19.1

Classifying Enzymes To what class does the enzyme that catalyzes the following reaction belong? ...

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The reaction is a transfer of an amino functional ...

Question: 18.5

Drawing Side-Chain Interactions What type of noncovalent interaction occurs between the threonine and glutamine side chains? Draw the structures of these amino acids to show the interaction. ANALYSIS The side chains of threonine and glutamine contain an amide group and a hydroxyl group, ...

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The noncovalent, hydrogen bond interaction between...

Question: 18.4

Drawing Dipeptides Draw the structure of the dipeptide Ala-Gly. ...

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The structures of alanine and glycine, and the str...

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