Chapter 5

Which complex carbohydrate contains only a-1,4-glycosidic linkages? 1. Amylopectin 2. Glycogen 3. Cellulose 4. Amylose

4. Amylose

What are the primary functions of carbohydrates in cells? 1. catalysis, energy storage, metabolism, and structure 2. energy storage, information storage, polymerization, and raw material source for synthesis 3. catalysis, digestion, energy storage, and information storage 4. cell identity, energy storage, raw material source for synthesis, and structure

4. Cell identity, energy storage, raw material source for synthesis, and structure

A glycosidic linkage is analogous to which of the following in proteins? 1. a disulfide bond 2. an amino group 3. a β-pleated sheet 4. a peptide bond

4. a peptide bond

How do carbohydrates contain and/or display information for cells? 1. Carbohydrates contain and display information at the cell surface. 2. Carbohydrates have no role in containing or displaying information for cells. 3. Carbohydrates store information in the nucleus. 4. Carbohydrates display information used by mitochondria to bond to substrates and catalyze reactions.

1. Carbohydrates contain and display information at the cell surface

Which of the following statements about monosaccharide structure is true? 1. Monosaccharides can be classified according to the spatial arrangement of their atoms. 2. Aldoses and ketoses differ in the position of their hydroxyl groups. 3. All monosaccharides contain carbon, hydrogen, oxygen, and nitrogen atoms. 4. A six-carbon sugar is called a pentose.

1. Monosaccharides can be classified according to the spatial arrangement of their atoms.

True or false? Peptidoglycan is a polysaccharide found only in bacteria. 1. True 2. False

1. True

Which of the following categories includes all others in the list? 1. monosaccharide 2. carbohydrate 3. polysaccharide 4. disaccharide 5. starch

2. carbohydrate

Which molecule is not a carbohydrate? 1. Glycogen 2. Lipid 3. Starch 4. Cellulose

2. lipid

Which of the following complex carbohydrates is listed with its correct function? 1. Starch: primary energy-storage molecule in animals 2. Amylose: main component of plant starch 3. Cellulose: structural component of plant cell walls 4. Chitin: constituent of bacterial cell walls

3. Cellulose: structural component of plant cell walls

Which polysaccharide contains a modified monosaccharide? 1. Cellulose 2. Starch 3. Peptidoglycan 4. Glycogen

3. Peptidoglycan

What is the major structural difference between starch and glycogen? 1. the type of glycosidic linkages in the molecule 2. the types of monosaccharide subunits in the molecules 3. whether glucose is in the α or β form 4. the amount of branching that occurs in the molecule

4. the amount of branching that occurs in the molecule

Polymers that contain sugars 1. (a) may store hereditary information. 2. (b) may store energy. 3. (c) may protect cells. 4. Both (b) and (c). 5. (a), (b), and (c).

5. (a), (b), and (c).