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BIOL 101 UNC Final Exam Review Part One (Unit 1
Exam) Complete Questions And Answers With Latest
Quiz
1. Stabilizing the unique coiled structure of an alpha helix in a protein is primarily
attributed to:
a. Hydrogen bonds between peptide backbone atoms
b. Disulfide bridges between amino acid side chains
c. Double bonds attached to polar amino acids
d. Peptide linkages that covalently bond amino acids
e. An abundance of amino acids with electrically charged side chains - (answers)a.
Hydrogen bonds between peptide backbone atoms
2. Which of the following best explains why enzymes are effective in facilitating
chemical reactions?
a. They lower the temperature of the reaction, thereby speeding up the
conversion of reactants to products
b. They alter the equilibrium of a reaction so that more reactants can be
converted to products
c. They increase the maximum rate of the chemical reaction
d. They lower the activation energy, thus speeding up the conversion of reactants
to products
e. They donate energy to reactions, thus allowing nonspontaneous reactions to
proceed - (answers)d. They lower the activation energy, thus speeding up the
conversion of reactants to products
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3. Mitochondria and chloroplasts are both found in plant cells, but prokaryotes
only have mitochondria.
a. This statement is true b. This statement is false - (answers)B. This statement is
false
4. In eukaryotic photosynthetic cells, which of the following occurs when
electrons flow cyclically through the electron transport chain associated with
photosystem I?
a. Synthesis of ATP
b. Reduction of NADP+ to NADPH
c. Release of oxygen
d. Reduction of carbon dioxide to glucose
e. Formation of water - (answers)B. Reduction of NADP+ to NADPH
5. True or false: the action of an inhibitor that diminishes the rate of an enzyme's
function by binding reversibly to the active site is best known as noncompetitive
inhibition.
a. TRUE b. FALSE - (answers)B. FALSE
Which image to the right is a correct representation of both the phospholipid
bilayer and active transport across this membrane?
A B C D E. none of the choices - (answers)E. none of the choices
The presence of glucagon leads to which reaction in a human liver cell?
BIOL 101 UNC Final Exam Review Part One (Unit 1
Exam) Complete Questions And Answers With Latest
Quiz
1. Stabilizing the unique coiled structure of an alpha helix in a protein is primarily
attributed to:
a. Hydrogen bonds between peptide backbone atoms
b. Disulfide bridges between amino acid side chains
c. Double bonds attached to polar amino acids
d. Peptide linkages that covalently bond amino acids
e. An abundance of amino acids with electrically charged side chains - (answers)a.
Hydrogen bonds between peptide backbone atoms
2. Which of the following best explains why enzymes are effective in facilitating
chemical reactions?
a. They lower the temperature of the reaction, thereby speeding up the
conversion of reactants to products
b. They alter the equilibrium of a reaction so that more reactants can be
converted to products
c. They increase the maximum rate of the chemical reaction
d. They lower the activation energy, thus speeding up the conversion of reactants
to products
e. They donate energy to reactions, thus allowing nonspontaneous reactions to
proceed - (answers)d. They lower the activation energy, thus speeding up the
conversion of reactants to products
, 2|Page
3. Mitochondria and chloroplasts are both found in plant cells, but prokaryotes
only have mitochondria.
a. This statement is true b. This statement is false - (answers)B. This statement is
false
4. In eukaryotic photosynthetic cells, which of the following occurs when
electrons flow cyclically through the electron transport chain associated with
photosystem I?
a. Synthesis of ATP
b. Reduction of NADP+ to NADPH
c. Release of oxygen
d. Reduction of carbon dioxide to glucose
e. Formation of water - (answers)B. Reduction of NADP+ to NADPH
5. True or false: the action of an inhibitor that diminishes the rate of an enzyme's
function by binding reversibly to the active site is best known as noncompetitive
inhibition.
a. TRUE b. FALSE - (answers)B. FALSE
Which image to the right is a correct representation of both the phospholipid
bilayer and active transport across this membrane?
A B C D E. none of the choices - (answers)E. none of the choices
The presence of glucagon leads to which reaction in a human liver cell?
