Introduction to General, Organic and Biochemistry
11th Edition
ISBN: 9781285869759
Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher: Cengage Learning
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Chapter 13, Problem 13.38P
13-38 (Chemical Connections 13A) What is meant by the term biodegradable?
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14:17
15. Water-soluble proteins are denatured
when there is a change in the pH of the
environment in which they are found. This
occurs due to the protonation and
deprotonation of functional groups
present in their structure. Choose the
option that indicates the chemical bonds
modified by pH in the protein represented
in the following figure.
E
CH2
C-OH
CH2
H₂C
H₁C
CH
CH3
CH3
CH
CH₂-S-S-CH₂-
910
H
B
-CH2-CH2-CH2-CH₂-NH3* −0—C—CH₂-
○ A) A, C e D.
• В) Вес
○ C) DeE
○ D) B, De E
○ E) A, B e C
68
Suppose sodium sulfate has been gradually added to 100 mL of a solution containing calcium ions and strontium ions, both at 0.15 mol/L. Indicate the alternative that presents the percentage of strontium ions that will have precipitated when the calcium sulfate begins to precipitate.
Data: Kps of calcium sulfate: 2.4x10 ⁻ ⁵; Kps of strontium sulfate: 3.2x10 ⁻ ⁷
A) 20,2 %
B) 36,6 %
C) 62,9 %
D) 87,5 %
E) 98.7%
14:43 A
Candidate Identification
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14. The following diagrams represent
hypothetical membrane structures with
their components numbered from 1 to 6.
Based on the figures and your knowledge
of biological membranes, select the
correct alternative.
|
3
5
||
人
2
500000
6
A) Structures 1, 3, 5, 2 and 4 are present
in a constantly fluid arrangement that
allows the selectivity of the movement
○ of molecules. Structure 4, present
integrally or peripherally, is responsible
for this selection, while the quantity of 6
regulates the fluidity.
B) The membranes isolate the cell from
the environment, but allow the passage
of water-soluble molecules thanks to
the presence of 2 and 3. The membrane
in scheme is more fluid than that in
55
Chapter 13 Solutions
Introduction to General, Organic and Biochemistry
Ch. 13.2 - Prob. 13.1PCh. 13 - Answer true or false. Alkenes, alkynes, and arenes...Ch. 13 - 13-3 What is the difference in structure between a...Ch. 13 - 13-4 Define aromatic compound.Ch. 13 - 13-5 Why are alkenes, alkynes, and aromatic...Ch. 13 - 13-B Do aromatic rings have double bonds? Are they...Ch. 13 - 13-7 Can an aromatic compound be a saturated...Ch. 13 - Draw at least two structural formulas for each of...Ch. 13 - 13-9 Write a structural formula and the name for...Ch. 13 - 13-10 Account for the fact that the six-membered...
Ch. 13 - 13-11 Explain why the compound 1,4-dichlorobenzene...Ch. 13 - 13-12 One analogy often used to explain the...Ch. 13 - 13-13 Answer true or false. A phenyl group has the...Ch. 13 - Prob. 13.14PCh. 13 - 13-15 Draw structural formulas for these compounds...Ch. 13 - 13-16 We say that naphthalene, anthracene,...Ch. 13 - 13-17 Following is the structural formula of...Ch. 13 - 13-18 Answer true or false. Benzene does not...Ch. 13 - 13-19 Suppose you have unlabeled bottles of...Ch. 13 - 13-20 Three products with the molecular formula...Ch. 13 - 13-21 The reaction of bromine with toluene in the...Ch. 13 - 13-22 What reagents and/or catalysts are necessary...Ch. 13 - 13-23 What reagents and/or catalysts are necessary...Ch. 13 - Prob. 13.24PCh. 13 - 13-25 Answer true or false. (a) Phenols and...Ch. 13 - 13-26 Both phenol and cyclohexanol are only...Ch. 13 - 13-27 Define autoxidation.Ch. 13 - 13*28 Autoxidation is described as a radical-chain...Ch. 13 - 13-29 Show that if you add Steps 2a and 2b of the...Ch. 13 - 13-30 How does vitamin E function as an...Ch. 13 - 13-31 What structural features are common to...Ch. 13 - 13*32 Black-and-white photography is a commercial...Ch. 13 - 13-33 Following is the structural formula of...Ch. 13 - 13-34 (Chemical Connections 13A) From what parts...Ch. 13 - Prob. 13.35PCh. 13 - 13-36 (Chemical Connections 13A, Would you expect...Ch. 13 - Prob. 13.37PCh. 13 - 13-38 (Chemical Connections 13A) What is meant by...Ch. 13 - 13-39 (Chemical Connections 13B) What is a...Ch. 13 - 13-40 (Chemical Connections 130 In the absence of...Ch. 13 - Prob. 13.41PCh. 13 - 13-42 (Chemical Connections 13E) What are the...Ch. 13 - 13-43 (Chemical Connections 13E) Which features of...Ch. 13 - 13-44 (Chemical Connections 13E) What color would...Ch. 13 - Prob. 13.45PCh. 13 - Prob. 13.46PCh. 13 - Prob. 13.47PCh. 13 - 13-48 (Chemical Connections 13F, How many...Ch. 13 - 13-49 (Chemical Connections 13F) In what ways is...Ch. 13 - 13*50 The structure for naphthalene given in...Ch. 13 - 13-51 Draw structural formulas for these...Ch. 13 - 13-52 2,6-Di-/ezY-butyl-4-methylphenol (BHT,...Ch. 13 - 13-53 Write the structural formula for the product...Ch. 13 - 13-54 Styrene reacts with bromine to give a...Ch. 13 - 13-55 When toluene is treated with Br, in the...Ch. 13 - 13-56 Four alternatives to the structure of...Ch. 13 - 13-57 Benzene, as we have seen in this chapter, is...
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