AP Bio Ch 5 Review

Lactose, a sugar in milk, is composed of one glucose molecule joined by a glycosidic linkage to one galactose molecule. How is lactose classified?

• As a disaccharide
• As a polysaccharide
• As a monosaccharide
• As a hexose

Which of the following statements concerning saturated fats is not true?

• They have multiple double bonds in the carbon chains of their fatty acids.
• They contain more hydrogen than unsaturated fats having the same number of carbon atoms.
• They generally solidify at room temperature.
• They are more common in animals than in plants.

Which of the following statements is true for the class of biological molecules known as lipids?

• They are made from glycerol, fatty acids, and phosphate.
• They are insoluble in water.
• They are made by dehydration reactions.
• They contain less energy than proteins and carbohydrates.

Upon chemical analysis, a particular polypeptide was found to contain 100 amino acids. How many peptide bonds are present in this protein?

• 99
• 97
• 98
• 101

Normal hemoglobin is a tetramer, consisting of two molecules of b hemoglobin and two molecules of a hemoglobin. In sickle–cell disease, as a result of a single amino acid change, the mutant hemoglobin tetramers associate with each other and assemble into large fibers. Based on this information alone, we can conclude that sickle–cell hemoglobin exhibits

• altered primary structure and altered quaternary structure; the secondary and tertiary structures may or may not be altered.
• altered primary structure.
• altered tertiary structure.
• altered secondary structure.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

What is the term used for a protein molecule that assists in the proper folding of other proteins?

• chaperonin
• tertiary protein
• enzyme protein
• renaturing protein

If cells are grown in a medium containing radioactive ¹⁵N, which of these molecules will be labeled?

• both proteins and nucleic acids
• proteins only
• amylase only
• nucleic acids only

Which of the following best summarizes the relationship between dehydration reactions and hydrolysis?

• Dehydration reactions eliminate water from lipid membranes, and hydrolysis makes lipid membranes water permeable.
• Dehydration reactions ionize water molecules and add hydroxyl groups to polymers; hydrolysis reactions release hydroxyl groups from polymers.
• Dehydration reactions assemble polymers, and hydrolysis reactions break down polymers.
• Dehydration reactions can occur only after hydrolysis.

The label on a container of margarine lists "hydrogenated vegetable oil" as the major ingredient. What is the result of adding hydrogens to vegetable oil?

• The hydrogenated vegetable oil is less likely to clog arteries.
• The hydrogenated vegetable oil has more "kinks" in the fatty acid chains.
• The hydrogenated vegetable oil has fewer trans fatty acids.
• The hydrogenated vegetable oil stays solid at room temperature.

If cells are grown in a medium containing radioactive ³⁵S, which of these molecules will be labeled?

• phospholipids
• nucleic acids
• proteins
• amylose