Chapter 24 - Carbohydrates (Test Bank)

1. The Fischer projection of (+)-glyceraldehyde is shown below. Which of the following describes this structure?




A. D-aldotriose with the R configuration
B. L-aldotriose with the R configuration
C. D-aldotriose with the S configuration
D. L-aldotriose with the S configuration
Bloom's Level: 2. Understand
Chapter: 24
Difficulty: Medium
Gradable: automatic
Section: 24.02
Subtopic: Aldoses and ketoses
Subtopic: D and L nomenclature
Topic: Carbohydrates



2. The following carbohydrate is a




A. D-aldotetrose.
B. L-aldotetrose.
C. D-ketotetrose.
D. L-aldopentose.

Bloom's Level: 2. Understand
Chapter: 24
Difficulty: Medium
Gradable: automatic
Section: 24.03
Subtopic: Aldoses and ketoses
Subtopic: D and L nomenclature
Topic: Carbohydrates


3. How many stereoisomeric D-aldopentoses are there?

A. four
B. six
C. eight
D. sixteen

Accessibility: Keyboard Navigation
Bloom's Level: 3. Apply
Chapter: 24
Difficulty: Easy
Gradable: automatic
Section: 24.04
Subtopic: Aldoses and ketoses
Subtopic: Physical properties of monosaccharides
Topic: Carbohydrates


24-1
Copyright © 2016 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of
McGraw-Hill Education.

,4. What is the relationship between D-xylose and L-xylose?

A. identical structures
B. enantiomers
C. constitutional isomers
D. epimers

Accessibility: Keyboard Navigation
Bloom's Level: 2. Understand
Chapter: 24
Difficulty: Easy
Gradable: automatic
Section: 24.04
Subtopic: D and L nomenclature
Topic: Carbohydrates


5. Which one of the following describes the furanose forms of carbohydrates?

A. a six-membered ring consisting of all carbons
B. a six-membered ring consisting of five carbons and one oxygen
C. a five-membered ring consisting of all carbons
D. a five-membered ring consisting of four carbons and one oxygen

Accessibility: Keyboard Navigation
Bloom's Level: 2. Understand
Chapter: 24
Difficulty: Easy
Gradable: automatic
Section: 24.06
Subtopic: Physical properties of monosaccharides
Topic: Carbohydrates

6.
What are the configurations of carbon atoms 2 and 3, respectively, of D-threose, shown below?




A. R,R
B. R,S
C. S,R
D. S,S

Bloom's Level: 3. Apply
Chapter: 24
Difficulty: Medium
Gradable: automatic
Section: 24.02
Subtopic: Physical properties of monosaccharides
Topic: Carbohydrates


7. How many stereoisomeric aldohexoses are there?

A. four
B. eight
C. sixteen
D. eighteen

Accessibility: Keyboard Navigation
Bloom's Level: 3. Apply
Chapter: 24
Difficulty: Easy
Gradable: automatic
Section: 24.04
Subtopic: Aldoses and ketoses
Subtopic: Physical properties of monosaccharides
Topic: Carbohydrates

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Copyright © 2016 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of
McGraw-Hill Education.

, 8. Which one of the following is not true concerning D-glucose?

A. It?s enantiomer is L-glucose.
B. It readily forms cyclic hemiacetals.
C. It is optically active.
D. It is classified as a ketose.

Accessibility: Keyboard Navigation
Bloom's Level: 2. Understand
Chapter: 24
Difficulty: Medium
Gradable: automatic
Section: 24.07
Subtopic: Aldoses and ketoses
Subtopic: Physical properties of monosaccharides
Subtopic: Reactions of carbohydrates
Topic: Carbohydrates


9. Which one of the following is β-D-ribofuranose?




A. A
B. B
C. C
D. D

Bloom's Level: 2. Understand
Chapter: 24
Difficulty: Medium
Gradable: automatic
Section: 24.06
Subtopic: Physical properties of monosaccharides
Topic: Carbohydrates




24-3
Copyright © 2016 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of
McGraw-Hill Education.