Fundamentals of General, Organic, and Biological Chemistry 6th. Edition by McMurry, John E.; Ballantine, David S.; Hoeger, Carl A.; Peterson, Virginia E.; Castellion, Mary E | 9780136054504 | 136054501

Organic Chemistry, General Chemistry, Biological Chemistry

Fundamentals of General, Organic, and Biological Chemistry

224 SOLVED PROBLEMS

1 SOLVED PROBLEMS

Question: 1.12

(a) Convert 0.75 lb to grams. (b) Convert 0.50 qt to deciliters. ANALYSIS Start with conversion factors and set up equations so that units cancel appropriately. ...

Verified Answer:

(a) Select the conversion factor from Worked Examp...

Question: 18.2

Look up the zwitterion structure of valine in Table 18.3. Draw valine as it would be found (a) at low pH and (b) at high pH. ANALYSIS At low pH, which is acidic, basic groups may gain H^+ and at high pH, which is basic, acidic groups may lose H^+. In the zwitterion form of an amino acid, the ...

Verified Answer:

Valine has an alkyl-group side chain that is unaff...

Question: 28.1

The blood serum concentration of the transaminase from heart muscle, aspartate aminotransferase (AST), is used in the diagnosis of heart disease because the enzyme escapes into the serum from damaged heart cells. AST catalyzes transamination of aspartate with α-ketoglutarate. What are the products ...

Verified Answer:

The overall reaction is therefore Aspartate + α-Ke...

Question: 19.4

Look at the three-step pathway for the conversion of 3-phosphoglycerate to serine: 3-phosphoglycerate →^1 3-phosphohydroxypyruvate →^2 3-phosphoserine →^3 serine When the cell has plenty of serine available, which enzyme in the pathway, 1, 2 or 3, is most likely to be inhibited? ANALYSIS This is a ...

Verified Answer:

Assuming that feedback control is the simplest con...

Question: 23.3

The following overall reaction is a good example of the coupling of endergonic and exergonic reactions: UTP + Glucose 1-phosphate + H2O → Glucose-UDP + 2 HOPO3^2- The coupled reactions are UTP + Glucose 1-phosphate → Glucose-UDP + OP2O6^4- ΔG = 1.1 kcal/mol ...

Verified Answer:

Inspection of the coupled reactions shows

O...

Question: 23.1

How do the names of the enzymes involved in the first two steps of glycolysis relate to the reactions involved? ANALYSIS Look at the names of the enzymes and the reactions. Also recall the enzyme classification scheme from Chapter 19 ...

Verified Answer:

In the first reaction, a phosphoryl group is added...

Question: 10.10

What is the pH of a 0.0045 M solution of HClO4? ANALYSIS Finding pH requires first finding [H3O^+] and then using the equation pH = -log[H3O^+]. Since HClO4 is a strong acid (see Table 10.1), it is 100% dissociated, and so the H3O^+ concentration is the same as the HClO4 concentration. BALLPARK ...

Verified Answer:

[H_3O^+] = 0.0045 M = 4.5 \times 10^{-3} ...

Question: 10.8

What is the pH of a 0.01 M solution of HCl? ANALYSIS To find pH, we must first find the value of [H3O^+]. ...

Verified Answer:

Since HCl is a strong acid (Table 10.1), it is 100...

Question: 25.1

Describe how the fat in an ice cream cone gets from the ice cream to a liver cell. ANALYSIS Dietary fat from animal sources (such as the whole milk often found in ice cream) is primarily triacylglycerides with a small amount of cholesterol present. Fat-digesting enzymes are secreted by the pancreas ...

Verified Answer:

As the ice cream cone is eaten, it passes through ...

Question: 22.3

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

Verified Answer:

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

Question: 23.2

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

Verified Answer:

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