Bundle: Introduction to General, Organic and Biochemistry, 11th + OWLv2, 4 terms (24 months) Printed Access Card
11th Edition
ISBN: 9781305705159
Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher: Cengage Learning
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Textbook Question
Chapter 22, Problem 22.61P
22-61 Polyglutamic acid (a polypeptide chain made only of glutamic acid residues) has an a-helix conformation below pH 6.0 and a random-coil conformation above pH 6.0. What is the reason for this conformational change?
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10. (5pts) Provide the complete arrow pushing mechanism for the chemical transformation →
depicted below
Use proper curved arrow notation that explicitly illustrates all bonds being broken, and
all bonds formed in the transformation.
Also, be sure to include all lone pairs and formal charges on all atoms involved in the
flow of electrons.
CH3O
II
HA
H
CH3O-H
H
①
Do the Lone Pairs get added bc its valence e's are a total of 6 for oxygen and that completes it or due to other reasons. How do we know the particular indication of such.
NGLISH
b)
Identify the bonds present in the molecule drawn (s) above.
(break)
State the function of the following equipments found in laboratory.
Omka)
a) Gas mask
b) Fire extinguisher
c) Safety glasses
4.
60cm³ of oxygen gas diffused through a porous hole in 50 seconds. How long w
80cm³ of sulphur(IV) oxide to diffuse through the same hole under the same conditions
(S-32.0.0-16.0)
(3 m
5.
In an experiment, a piece of magnesium ribbon was cleaned with steel w
clean magnesium ribbon was placed in a crucible and completely burnt in oxy
cooling the
product weighed 4.0g
a)
Explain why it is necessary to clean magnesium ribbon.
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Chapter 22 Solutions
Bundle: Introduction to General, Organic and Biochemistry, 11th + OWLv2, 4 terms (24 months) Printed Access Card
Ch. 22.4 - Problem 22-1 Show how to form the dipeptide...Ch. 22.10 - Problem 22-2 What is the oxidation number (the...Ch. 22.10 - Prob. 22.3PCh. 22.11 - Prob. 22.4PCh. 22 - 22-5 What are the functions of (a) ovalbumin and...Ch. 22 - 22-6 The members of which class of proteins are...Ch. 22 - 22-7 What is the function of an immunoglobulin?Ch. 22 - Prob. 22.8PCh. 22 - 22-9 What is the difference in structure between...Ch. 22 - 22-10 Classify the following amino acids as...
Ch. 22 - 22-11 Which amino acid has the highest percentage...Ch. 22 - Prob. 22.12PCh. 22 - Prob. 22.13PCh. 22 - Prob. 22.14PCh. 22 - Prob. 22.15PCh. 22 - 22-16 Which amino acids in Table 22-1 have more...Ch. 22 - 22-17 What are the similarities and differences in...Ch. 22 - 22-18 Draw the structures of L- and D-valine.Ch. 22 - Prob. 22.19PCh. 22 - 22-20 Show how alanine, in solution at its...Ch. 22 - 22-21 Explain why an amino acid cannot exist in an...Ch. 22 - 22-22 Draw the structure of valine at pH 1 and at...Ch. 22 - Prob. 22.23PCh. 22 - 22-24 Draw the most predominant form of histidine...Ch. 22 - 22-25 Draw the most predominant form of lysine at...Ch. 22 - Prob. 22.26PCh. 22 - 22-27 Show by chemical equations how alanine and...Ch. 22 - 22-28 A tetrapeptide is abbreviated as DPKH. Which...Ch. 22 - 22-29 Draw the structure of a tripeptide made of...Ch. 22 - 22-30 (a) Use the three-letter abbreviations to...Ch. 22 - 22-31 A polypeptide chain is made of alternating...Ch. 22 - Prob. 22.32PCh. 22 - 22-33 Which of the three functional groups on...Ch. 22 - Prob. 22.34PCh. 22 - 22-35 Why is histidine considered a basic amino...Ch. 22 - Prob. 22.36PCh. 22 - Prob. 22.37PCh. 22 - 22-38 Why does proline not absorb light at 280 nm?Ch. 22 - Prob. 22.39PCh. 22 - Prob. 22.40PCh. 22 - Prob. 22.41PCh. 22 - 22-42 (a) How many atoms of the peptide bond lie...Ch. 22 - 22-43 (a) Draw the structural formula of the...Ch. 22 - 22-44 How can a protein act as a buffer?Ch. 22 - 22-45 Proteins are least soluble at their...Ch. 22 - 22-46 How many different tripeptides can be made...Ch. 22 - 22-47 How many different tetrapeptides can be made...Ch. 22 - 22-48 How many amino acid residues in the A chain...Ch. 22 - 22-49 Based on your knowledge of the chemical...Ch. 22 - 22-50 Is a random coil a (a) primary, (b)...Ch. 22 - 22-51 Decide whether the following structures that...Ch. 22 - Prob. 22.52PCh. 22 - 22-53 Do iron and zinc ions play role in protein...Ch. 22 - Prob. 22.54PCh. 22 - 22-55 Consider the coordination compound Fe(CO)5...Ch. 22 - Prob. 22.56PCh. 22 - 22-57 Consider the coordination compound...Ch. 22 - Prob. 22.58PCh. 22 - 22-59 What is the effect of salt bridges on the...Ch. 22 - Prob. 22.60PCh. 22 - 22-61 Polyglutamic acid (a polypeptide chain made...Ch. 22 - 22-62 Distinguish between intermolecular and...Ch. 22 - 22-63 Identify the primary, secondary, and...Ch. 22 - 22-64 If both cysteine residues on the B chain of...Ch. 22 - 22-65 (a) What is the difference in the quaternary...Ch. 22 - Prob. 22.66PCh. 22 - Prob. 22.67PCh. 22 - Prob. 22.68PCh. 22 - Prob. 22.69PCh. 22 - Prob. 22.70PCh. 22 - 22-71 Which amino acid side chain is most...Ch. 22 - 22-72 What does the reducing agent do in...Ch. 22 - 22-73 Silver nitrate is sometimes put into the...Ch. 22 - 22-74 Why do nurses and physicians use 70% alcohol...Ch. 22 - 22-75 (Chemical Connections 22A) Why must some...Ch. 22 - Prob. 22.76PCh. 22 - Prob. 22.77PCh. 22 - Prob. 22.78PCh. 22 - Prob. 22.79PCh. 22 - Prob. 22.80PCh. 22 - Prob. 22.81PCh. 22 - 22-82 (Chemical Connections 22H) How does the...Ch. 22 - Prob. 22.83PCh. 22 - 22-84 How many different dipeptides can be made...Ch. 22 - 22-85 Denaturation is usually associated with...Ch. 22 - Prob. 22.86PCh. 22 - Prob. 22.87PCh. 22 - Prob. 22.88PCh. 22 - 22-89 What kind of noncovalent interaction occurs...Ch. 22 - Prob. 22.90PCh. 22 - 22-91 Which amino acid does not rotate the plane...Ch. 22 - 22-92 Write the expected products of the acid...Ch. 22 - 22-93 What charges are on aspartic acid at pH 2.0?Ch. 22 - Prob. 22.94PCh. 22 - Prob. 22.95PCh. 22 - Prob. 22.96PCh. 22 - 22-97 Gelatin is derived from collagen by...Ch. 22 - Prob. 22.98PCh. 22 - Prob. 22.99PCh. 22 - Prob. 22.100PCh. 22 - 22-101 Using what you know about protein...Ch. 22 - Prob. 22.102PCh. 22 - Prob. 22.103PCh. 22 - 22-104 Why is collagen not a very good source of...Ch. 22 - Prob. 22.105P
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