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- 1. Multiple Choice
The differences between two molecules include the type of sugar that forms a section of the molecules and the identity of one of the four nitrogenous bases that make up another section of the molecules. These two molecules are —
proteins
lipids
nucleic acids
complex carbohydrates
- 2. Multiple Choice
The complex carbohydrates pictured below are made by linking molecules of glucose.
In all three complex carbohydrates, the subunits of glucose are bonded together differently. Because they have different structures, they most likely —
contain different chemical elements
form different proteins
carry different nucleotides
perform different functions
- 3. Multiple Choice
An advertisement for a health supplement for dogs claims to build lean muscle and strengthen tendons and ligaments, as well as provide energy. Which two biomolecules must the supplement contain to provide these benefits?
Carbohydrates and lipids
Proteins and carbohydrates
Nucleic acids and carbohydrates
Lipids and nucleic acids
- 4. Multiple Choice
Two biomolecules are shown.
Which of the following best describes these biomolecules?
Molecule X and Molecule Y are both carbohydrates.
Molecule X is a nucleic acid, and Molecule Y is a carbohydrate.
Molecule X and Molecule Y are both nucleic acids.
Molecule X is a carbohydrate, and Molecule Y is a nucleic acid.
- 5. Multiple Choice
Macromolecules which are both hydrophobic and hydrophilic and are a major component of cell membranes are –
polysaccharides
proteins
phospholipids
inorganic
- 6. Multiple Choice
Which of the following is not a lipid?
steroid
cholesterol
wax
cellulose
- 7. Multiple Choice
Which biomolecule do living organisms use as energy storage?
carbohydrates
lipids
protein
nucleic acid
- 8. Multiple Choice
Many land plants store energy in starch. When energy is needed, the starch molecules can be broken down quickly. Starch is which of the following molecules?
amino acid
lipid
polysaccharide
RNA chain
- 9. Multiple Choice
Beeswax is a waxy substance that is produced by bees and then harvested by humans for a variety of uses. Ancient Romans used beeswax as a waterproofing agent because it is not water-permeable. Beeswax is which of the following types of organic molecule?
carbohydrate
lipid
nucleic acid
protein
- 10. Multiple Choice
Which of the following macromolecules are a prominent part of animal tissues that function in insulation, helping animals conserve heat?
carbohydrates
lipids
proteins
nucleic acids
- 11. Multiple Choice
Many plants have waxy coatings on some surfaces. This coating reduces water loss because it is not water-permeable. This waxy coating is which of the following types of organic molecule?
carbohydrate
lipid
nucleic acid
protein
- 12. Multiple Choice
Many land plants store energy in starch. When energy is needed, the starch molecules can be broken down quickly. This chemical reaction produces which of the following?
amino acids
lipids
monosaccharides
RNA chains
- 13. Multiple Choice
The enzymes that catalyze cellular reactions are macromolecules called proteins. Which of the following elements most often compose proteins?
carbon and hydrogen
carbon, hydrogen, oxygen, and nitrogen
carbon, hydrogen, and oxygen
carbon, hydrogen, oxygen, nitrogen, and phosphorus
- 14. Multiple Choice
The enzymes that catalyze cellular reactions are macromolecules made of organic compounds composed of carbon, hydrogen, oxygen, and nitrogen. These types of macromolecules are known as
starches
sugars
proteins
fats
- 15. Multiple Choice
A biomolecule that is a large, complex set of chains composed of alternating subunits called nucleotides has which of these functions in the cell?
storing energy
catalyzing cellular reactions
building tissue
storing genetic information
- 16. Multiple Choice
Which of these substances stores the most energy?
one gram of alcohol
one gram of carbohydrate
one gram of fat
one gram of protein
- 17. Multiple Choice
Like complex carbohydrates, proteins are biomolecules that serve many functions and can be chemically broken down and restructured. Both proteins and complex carbohydrates are which of the following?
Polymers of smaller subunits
Sequences of sugars
Lipids of large molecules
Nucleotides of DNA
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