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WorksheetsAP Bio Ch 5 Review
Total questions: 11
Worksheet time: 12mins
Name
Class
Date
1.
Lactose, a sugar in milk, is composed of one glucose molecule joined by a glycosidic linkage to one galactose molecule. How is lactose classified?
a)
As a disaccharide
b)
As a polysaccharide
c)
As a monosaccharide
d)
As a hexose
2.
Which of the following statements concerning saturated fats is not true?
a)
They have multiple double bonds in the carbon chains of their fatty acids.
b)
They contain more hydrogen than unsaturated fats having the same number of carbon atoms.
c)
They generally solidify at room temperature.
d)
They are more common in animals than in plants.
3.
Which of the following statements is true for the class of biological molecules known as lipids?
a)
They are made from glycerol, fatty acids, and phosphate.
b)
They are insoluble in water.
c)
They are made by dehydration reactions.
d)
They contain less energy than proteins and carbohydrates.
4.
Upon chemical analysis, a particular polypeptide was found to contain 100 amino acids. How many peptide bonds are present in this protein?
a)
99
b)
97
c)
98
d)
101
5.
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
a)
altered primary structure and altered quaternary structure; the secondary and tertiary structures may or may not be altered.
b)
altered primary structure.
c)
altered tertiary structure.
d)
altered secondary structure.
6.
What is the term used for a protein molecule that assists in the proper folding of other proteins?
a)
chaperonin
b)
tertiary protein
c)
enzyme protein
d)
renaturing protein
7.
If cells are grown in a medium containing radioactive 15N, which of these molecules will be labeled?
a)
both proteins and nucleic acids
b)
proteins only
c)
amylase only
d)
nucleic acids only
8.
Which of the following best summarizes the relationship between dehydration reactions and hydrolysis?
a)
Dehydration reactions eliminate water from lipid membranes, and hydrolysis makes lipid membranes water permeable.
b)
Dehydration reactions ionize water molecules and add hydroxyl groups to polymers; hydrolysis reactions release hydroxyl groups from polymers.
c)
Dehydration reactions assemble polymers, and hydrolysis reactions break down polymers.
d)
Dehydration reactions can occur only after hydrolysis.
9.
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?
a)
The hydrogenated vegetable oil is less likely to clog arteries.
b)
The hydrogenated vegetable oil has more "kinks" in the fatty acid chains.
c)
The hydrogenated vegetable oil has fewer trans fatty acids.
d)
The hydrogenated vegetable oil stays solid at room temperature.
10.
If cells are grown in a medium containing radioactive 35S, which of these molecules will be labeled?
a)
phospholipids
b)
nucleic acids
c)
proteins
d)
amylose
11.
Which of the following is true of both starch and cellulose?
a)
They are both structural components of the plant cell wall
b)
They are both polymers of glucose
c)
They are both used for energy storage in plants
d)
They can both be digested by humans
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