Quiz: Carbohydrate Quiz


Carbohydrate QuizOnline version Test your knowledge of carbs. by vectorscope 1 The main nutritional role of carbohydrates is to? a Store genetic information b Provide energy c Act as enzymes d Regulate hormones 2 Digestible carbohydrates provide approximately? a 2 kcal/g b 4 kcal/g c 7 kcal/g d 9 kcal/g 3 Which of the following is NOT a function of carbohydrates? a Energy storage b Structural support c Protein synthesis d Immune recognition 4 A monosaccharide with five carbon atoms is known as a? a Triose b Tetrose c Pentose d Hexose 5 Glucose is classified as a? a Ketohexose b Aldohexose c Aldopentose d Ketopentose 6 Fructose differs from glucose because fructose contains a? a Aldehyde group b Ketone group c Carboxyl group d Amino group 7 Two sugars that differ at only one chiral carbon are called? a Enantiomers b Structural isomers c Epimers d Anomers 8 The anomeric carbon of glucose is carbon? a C1 b C2 c C3 d C4 9 Which disaccharide is NOT a reducing sugar? a Maltose b Lactose c Sucrose d Cellobiose 10 The storage polysaccharide in animals is? a Starch b Cellulose c Chitin d Glycogen 11 All monosaccharides are reducing sugars. a True b False 12 The D- or L- configuration of a sugar is determined by the anomeric carbon. a True b False 13 Lactose intolerance occurs due to deficiency of the enzyme lactase. a True b False 14 Cellulose is composed of glucose units linked by α(1→4) bonds. a True b False 15 Mutarotation refers to the interconversion between α and β anomers in solution. a True b False 16 Glycogen is more highly branched than starch. a True b False 17 Carbohydrate digestion begins in the stomach. a True b False 18 Insulin increases blood glucose levels. a True b False 19 Chitin is a structural polysaccharide found in insect exoskeletons. a True b False 20 Sucrose consists of glucose and galactose. a True b False Feedback 1 Carbohydrates are the body’s primary energy source, supplying glucose for cellular respiration 2 Carbohydrates provide 4 kcal per gram, similar to proteins 3 Protein synthesis is carried out by amino acids and ribosomes, not carbohydrates. 4 Monosaccharides are named based on carbon number; 5 carbons = pentose 5 Glucose has an aldehyde group and six carbons, making it an aldohexose 6 Fructose is a ketose because it contains a ketone functional group. 7 Epimers differ in configuration at only one chiral carbon 8 In glucose, the aldehyde carbon (C1) becomes the anomeric carbon after cyclization. 9 Sucrose has both anomeric carbons involved in the glycosidic bond, so it cannot reduce reagents. 10 Animals store glucose as glycogen in liver and muscle. 11 Monosaccharides have free aldehyde or ketone groups (or can form them), allowing oxidation-reduction reactions 12 D/L configuration depends on the penultimate carbon, not the anomeric carbon 13 Without lactase, lactose cannot be broken down into glucose and galactose, causing digestive symptoms. 14 Cellulose has β(1→4) glycosidic bonds, which humans cannot digest. 15 In water, sugars switch between α and β forms via the open-chain structure. 16 Glycogen branches every 4–8 glucose units, while starch branches less frequently. 17 Digestion starts in the mouth with salivary amylase; stomach acid inactivates the enzyme. 18 Insulin lowers blood glucose by increasing glucose uptake and glycogen synthesis. 19 Chitin provides strength in insects and crustaceans and is made of N-acetylglucosamine. 20 Sucrose is composed of glucose and fructose, not galactose.

1

The main nutritional role of carbohydrates is to?

a

Store genetic information

b

Provide energy

c

Act as enzymes

d

Regulate hormones

2

Digestible carbohydrates provide approximately?

a

2 kcal/g

b

4 kcal/g

c

7 kcal/g

d

9 kcal/g

3

Which of the following is NOT a function of carbohydrates?

a

Energy storage

b

Structural support

c

Protein synthesis

d

Immune recognition

4

A monosaccharide with five carbon atoms is known as a?

a

Triose

b

Tetrose

c

Pentose

d

Hexose

5

Glucose is classified as a?

a

Ketohexose

b

Aldohexose

c

Aldopentose

d

Ketopentose

6

Fructose differs from glucose because fructose contains a?

a

Aldehyde group

b

Ketone group

c

Carboxyl group

d

Amino group

7

Two sugars that differ at only one chiral carbon are called?

a

Enantiomers

b

Structural isomers

c

Epimers

d

Anomers

8

The anomeric carbon of glucose is carbon?

a

C1

b

C2

c

C3

d

C4

9

Which disaccharide is NOT a reducing sugar?

a

Maltose

b

Lactose

c

Sucrose

d

Cellobiose

10

The storage polysaccharide in animals is?

a

Starch

b

Cellulose

c

Chitin

d

Glycogen

11

All monosaccharides are reducing sugars.

a

True

b

False

12

The D- or L- configuration of a sugar is determined by the anomeric carbon.

a

True

b

False

13

Lactose intolerance occurs due to deficiency of the enzyme lactase.

a

True

b

False

14

Cellulose is composed of glucose units linked by α(1→4) bonds.

a

True

b

False

15

Mutarotation refers to the interconversion between α and β anomers in solution.

a

True

b

False

16

Glycogen is more highly branched than starch.

a

True

b

False

17

Carbohydrate digestion begins in the stomach.

a

True

b

False

18

Insulin increases blood glucose levels.

a

True

b

False

19

Chitin is a structural polysaccharide found in insect exoskeletons.

a

True

b

False

20

Sucrose consists of glucose and galactose.

a

True

b

False

Feedback

1

Carbohydrates are the body’s primary energy source, supplying glucose for cellular respiration

2

Carbohydrates provide 4 kcal per gram, similar to proteins

3

Protein synthesis is carried out by amino acids and ribosomes, not carbohydrates.

4

Monosaccharides are named based on carbon number; 5 carbons = pentose

5

Glucose has an aldehyde group and six carbons, making it an aldohexose

6

Fructose is a ketose because it contains a ketone functional group.

7

Epimers differ in configuration at only one chiral carbon

8

In glucose, the aldehyde carbon (C1) becomes the anomeric carbon after cyclization.

9

Sucrose has both anomeric carbons involved in the glycosidic bond, so it cannot reduce reagents.

10

Animals store glucose as glycogen in liver and muscle.

11

Monosaccharides have free aldehyde or ketone groups (or can form them), allowing oxidation-reduction reactions

12

D/L configuration depends on the penultimate carbon, not the anomeric carbon

13

Without lactase, lactose cannot be broken down into glucose and galactose, causing digestive symptoms.

14

Cellulose has β(1→4) glycosidic bonds, which humans cannot digest.

15

In water, sugars switch between α and β forms via the open-chain structure.

16

Glycogen branches every 4–8 glucose units, while starch branches less frequently.

17

Digestion starts in the mouth with salivary amylase; stomach acid inactivates the enzyme.

18

Insulin lowers blood glucose by increasing glucose uptake and glycogen synthesis.

19

Chitin provides strength in insects and crustaceans and is made of N-acetylglucosamine.

20

Sucrose is composed of glucose and fructose, not galactose.

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Carbohydrate Quiz

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Carbohydrate QuizOnline version

by vectorscope

The main nutritional role of carbohydrates is to?

Digestible carbohydrates provide approximately?

Which of the following is NOT a function of carbohydrates?

A monosaccharide with five carbon atoms is known as a?

Glucose is classified as a?

Fructose differs from glucose because fructose contains a?

Two sugars that differ at only one chiral carbon are called?

The anomeric carbon of glucose is carbon?

Which disaccharide is NOT a reducing sugar?

The storage polysaccharide in animals is?

All monosaccharides are reducing sugars.

The D- or L- configuration of a sugar is determined by the anomeric carbon.

Lactose intolerance occurs due to deficiency of the enzyme lactase.

Cellulose is composed of glucose units linked by α(1→4) bonds.

Mutarotation refers to the interconversion between α and β anomers in solution.

Glycogen is more highly branched than starch.

Carbohydrate digestion begins in the stomach.

Insulin increases blood glucose levels.

Chitin is a structural polysaccharide found in insect exoskeletons.

Sucrose consists of glucose and galactose.

Feedback

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