Exam 3 Review Questions Flashcards
Polymers are
A. Made in labs by chemists
B. Used to treat plastic contamination of waterways.
C. Made of repeating units
D. Outdated because better materials now exist
C. Made of repeating units
Commonly found polymers include
A. Proteins
B. RNA
C. Cellulose
D. A, b, and c are correct
D. A, b, and c are correct
Polymers are commonly found in living systems because
A. They are difficult to synthesize, therefore do not degrade easily
B. They are unaffected by DNA mutation
C. They reduce the osmotic pressure by lowering the number of particles in a cell.
D. Their synthesis does not require an energy source such as GTP, ATP or 2’ deoxyATP
C. They reduce the osmotic pressure by lowering the number of particles in a cell
The inclusion of branching in polyethylene synthesis makes the final product
A. Have a higher density than HDPE
B. Unable to pack as closely as HDPE
C. Function well as a plastic spoon
D. Function poorly as lab gloves
B. Unable to pack as closely as HDPE
A polyethylene product needs to be rigid and have a high cold sheer value. Individual polymers in the material should be
A. Long
B. Short
C. Any length because the length does not affect these properties
D. Whatever length the particular synthesis yields, because polymer length cannot be controlled easily
A. Long
To generate styrofoam take-out containers, polystyrene can be synthesized in the presence of
A. CO2
B. Warm oil
C. Conditions that disfavor branching
D. Water
A. CO2
Polyamides can be synthesize by the reaction of
A. Amines with carboxylic acids
B. Addition polymerization
C. DNA and RNA molecules
D. Different types of enzymes
A. Amines with carboxylic acids
Polyester synthesis is an example of
A. Avoiding dangerous free radicals in the lab
B. Addition polymerization
C. Using sustainable resources
D. Condensation polymerization
D. Condensation polymerization
Polyester synthesis involves
A. Carboxylic acid reactants
B. Alcohol reactants
C. Water products
D. A, b, and c are correct
B. Alcohol reactants
An example of a catabolic pathway is the formation of
A. Proteins from amino acids
B. Pyruvic acid from glucose
C. Glycogen from glucose
D. Triglycerides from fatty acids
B. Pyruvic acid from glucose
Cellular anabolism and catabolism are handles by separate pathways because
A. If these processes were reversible, there would be much more wasted resources in the cell
B. These processes had to be separated because they evolved at different times
C. All reactions are easily reversible
D. Pathways must be reversible to be compatible with life
A. If these processes were reversible, there would be much more wasted resources in the cell
Anabolism is a reductive process, which means that
A. Electrons are carried away as large molecules are broken down into smaller ones.
B. Electrons are carried away as small molecules are broken down into atoms
C. Electrons are donated by electron carriers as small molecules are used to build up larger molecules
D. Electrons are donated to hydrogen bonds, which keep molecules together
C. Electrons are donated by electron carriers as small molecules are used to build up larger molecules
Malnutrition is different from undernourishment because malnutrition involves
A. An insufficient amount of calories in the diet
B. Too little exercise
C. A lack of essential nutrients in the diet
D. Too little attention to the diet
C. A lack of essential nutrients in the diet
Lipids include
A. Fats
B. Oils
C. Steroids
D. A, b, and c are correct
D. A, b, and c are correct
Saturated fatty acids contain
A. One or more double bonds between carbon atoms
B. Only single bonds between carbon atoms
C. Fewer hydrogen atoms that unsaturated fatty acids of the same length
D. The same number of hydrogen atoms as unsaturated fatty acids of the same length
B. Only single bonds between carbon atoms
