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Ch. 8 Questions and Answers
n1. What is a catalyst?
a. synthesis of cell molecules and structures
*b. A substance that speeds up a reaction
c. where the substrate binds to on an enzyme
d. organic compound that alters a substrate
2. An active site is:
a. also known as a catalytic site
b. removes excess metallic cofacters from the enzyme
c. where the substrate binds to the enzyme
d. b & c
*e. a & c
3. Another word for biosynthesis is_______.
a. catabolism
*b. anabolism
c. metabolism
d. catalyst
4. Catabolism is a form of metabolism in which ________ molecules are converted into _______ molecules.
*a. large, small
b. small, large
c. amino acid, protein
d. food, storage
5. An enzyme _______ the activation energy required for a chemical reaction.
a. increases
b. converts
*c. lowers
d. catalyzes
6. An enzyme
a. becomes part of the final products
b. is nonspecific for substrate
c. is consumed by the reaction
*d. is the heat and pH labile
7. Any process that breaks bonds of the larger molecules into smaller molecules
8.There are 3 ways for activation energy to occur except
*a Decrease the concentration of reactants
b Increasing the concentration of reactants
c Adding a catalyst
d Increasing thermal energy (heating) to increase molecular velocity
9. What often controls enzyme repression
*a. end-products
b. molecular mimics
c. substrates
d. reactants
e. bioenergetics
10. Which answer best describes enzymes?
a. a carrier molecule that resembles a shuttle that are alternately loaded and unloaded.
b. a general term for the totality of chemical and physical processes occuring in a cell.
*c. a protein biocatalyst that facilitates metabolic reactions
d. They raise the activation energy requried for a chemical reaction to proceed
11. Exergonic reactions
*a. release potential energy
b. consume energy
c. form bonds
d. occur only outside the cell
12. What is responsible for the overall direction of protein synthesis?
a. DNA
b. RNA
c. carbohydrates
*d. both a & b
13. Which of the following compounds has the greatest amount of energy for a cell?
a. CO2
b. ATP
c. *glucose
d. O2
e. lactic acid
a. synthesis of cell molecules and structures
*b. A substance that speeds up a reaction
c. where the substrate binds to on an enzyme
d. organic compound that alters a substrate
2. An active site is:
a. also known as a catalytic site
b. removes excess metallic cofacters from the enzyme
c. where the substrate binds to the enzyme
d. b & c
*e. a & c
3. Another word for biosynthesis is_______.
a. catabolism
*b. anabolism
c. metabolism
d. catalyst
4. Catabolism is a form of metabolism in which ________ molecules are converted into _______ molecules.
*a. large, small
b. small, large
c. amino acid, protein
d. food, storage
5. An enzyme _______ the activation energy required for a chemical reaction.
a. increases
b. converts
*c. lowers
d. catalyzes
6. An enzyme
a. becomes part of the final products
b. is nonspecific for substrate
c. is consumed by the reaction
*d. is the heat and pH labile
7. Any process that breaks bonds of the larger molecules into smaller molecules
- Anabolism
- Biosynthesis
- Redox
8.There are 3 ways for activation energy to occur except
*a Decrease the concentration of reactants
b Increasing the concentration of reactants
c Adding a catalyst
d Increasing thermal energy (heating) to increase molecular velocity
9. What often controls enzyme repression
*a. end-products
b. molecular mimics
c. substrates
d. reactants
e. bioenergetics
10. Which answer best describes enzymes?
a. a carrier molecule that resembles a shuttle that are alternately loaded and unloaded.
b. a general term for the totality of chemical and physical processes occuring in a cell.
*c. a protein biocatalyst that facilitates metabolic reactions
d. They raise the activation energy requried for a chemical reaction to proceed
11. Exergonic reactions
*a. release potential energy
b. consume energy
c. form bonds
d. occur only outside the cell
12. What is responsible for the overall direction of protein synthesis?
a. DNA
b. RNA
c. carbohydrates
*d. both a & b
13. Which of the following compounds has the greatest amount of energy for a cell?
a. CO2
b. ATP
c. *glucose
d. O2
e. lactic acid
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Latest page update: made by chelsarylee
, Feb 27 2009, 4:47 PM EST
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