WorksheetsAP Bio Final Rev Biochem
Total questions: 20
Worksheet time: 29mins
Which of the following is most closely related to the secondary structure of proteins?
lipids
peptide bonds
alpha helix
cellulose
Which two functional groups are always found in amino acids?
amine and sulfhydryl
hydroxyl and carboxyl
carboxyl and amine
phosphate group and nitrogenous base
The tremendous variation and unique properties of proteins are most likely a result of
interactions between R groups of the amino acids
hydrogen bonds lining amino acids
the sequence of amino acids in the primary structure of the protein
peptide bonds lining amino and carboxyl groups
Water is an excellent solvent. Select the property that justifies this statement.
as a polar molecule, it can surround and dissolve ionic and polar molecules
it forms ionic bonds with ions, hydrogen bonds with polar molecules, and hydrophobic interactions with non polar molecules
it forms hydrogen bonds with itself so cohesion is possible
it is liquid and will adhere to many substances
which is a protein monomer?
This image is of what type of macromolecule?
lipid
carbohydrate
protein
nucleic acid
The partial negative charge at one end of a water molecule is attracted to a partial positive charge of another water molecule. What is this type of attraction called?
a polar covalent bond
an ionic bond
a hydration shell
a hydrogen bond
The diagram shows a bond forming between two amino acids. What is the name of this reaction?
Dehydration Synthesis
Hydrolysis
Pepysis
Oxidation
How might an amino acid change at a site distant from the active site of the enzyme alter the enzyme's substrate specificity?
by changing the enzyme's stability
by changing the enzyme's location in the cell
by changing the shape of the protein
by changing the enzyme's pH optimum
For the enzyme-catalyzed reaction shown in Figure 6.2, which of these treatments will cause the greatest increase in the rate of the reaction, if the initial reactant concentration is 1.0 micromolar?
doubling the activation energy needed
cooling the reaction by 10°C
doubling the concentration of the reactants to 2.0 micromolar
doubling the enzyme concentration
In Figure 6.2, why does the reaction rate plateau at higher reactant concentrations?
Feedback inhibition by product occurs at high reactant concentrations.
Most enzyme molecules are occupied by substrate at high reactant concentrations.
The reaction nears equilibrium at high reactant concentrations.
The activation energy for the reaction increases with reactant concentration.
Which of the following in Figure 6.4 would be the same in either an enzyme-catalyzed or a noncatalyzed reaction?
a
b
c
d
Fireflies emit light. The production of light by an organism is called bioluminescence. To generate visible light, cells in a firefly’s tail produce thousands of luciferase enzymes. Luciferase binds to a chemical called luciferin. Once bound, the luciferase enzyme speeds up a chemical reaction that combines an oxygen molecule and luciferin to produce oxyluciferin. This reaction requires energy and releases light. Which of the following best describes how the luciferase enzyme speeds up the chemical reaction?
Luciferase increases the amount of time the light is visible.
Luciferase decreases the amount of energy required for the reaction to start.
Luciferase increases the number of sites on luciferin that must bind to oxygen.
Luciferase decreases the temperature of the environment inside the body of the firefly.
Pepsin and trypsin are two of the digestive enzymes that break down protein. A group of students studied the pH requirements of these enzymes. The graph below shows the results.
The students found that pepsin functions best in an acid environment and trypsin functions best in a neutral environment. Based on their observations, pepsin most likely aids in digestion in which part of the human body?
Pancreas
Intestines
Mouth
Stomach
If nerve gasses are inhaled, they will temporarily bind to an area on many enzymes that will change the shape of the enzyme. This prevents the enzymes from interacting with other substances and interferes in proper nervous system functioning resulting in death. The nerve gas is an example of a(n):
Substrate
Activation Inhibitor
Production Inhibitor
Competitive Inhibitor
Non-competitive Inhibitor
