BIO 181L STUDY GUIDE FINAL EXAM
QUESTIONS WITH CORRECT ANSWERS 2025
LAB 7: catalyst - CORRECT ANSWER -substance that speeds up the rate of a chemical reaction
LAB 7: Enzmes - CORRECT ANSWER -Proteins which serve as catalysts for certain chemical reactions
LAB 7: energy of activation - CORRECT ANSWER -
The amount of energy that reactants must absorb before a chemical reaction will start
LAB 7: Active site of an enzyme - CORRECT ANSWER -
the region of an enzyme that attachesRto a substrate
LAB 7: How do enzymes catalyze reactions? - CORRECT ANSWER -
by lowering the activation energy required for the reaction to occur
LAB 7: What are the seven major properties of enzymes? - CORRECT ANSWER -Most are proteins.
They are highly specific; most will only react with a certain substrate.
They form an enzyme-substrate complex:
E +S↔ES →P +E
They do not affect the direction of a reaction.
They lower the energy of activation of a reaction.
They are not consumed in the reaction.
They are often highly regulated.
, LAB 7: How do inhibitors work? - CORRECT ANSWER -
by preventing reactants from coming together because they have a similar shape to the substrate molec
ule.
Therefore less substrate molecules can bind to the enzymes so the reaction rate is decreased.
LAB 7: How do different substrates affect the rate of enzyme reactions? - CORRECT ANSWER -
The presence or absence of a specific chemical functional group can decide how well the enzyme works
for that reaction.
The ability of the enzyme to work well with certain substrates and not well with other similar substrates
is called specificity.
LAB 7: enzyme specificity - CORRECT ANSWER -
The ability of the enzyme to work well with certain substrates and not well with other similar substrates
LAB 7: How does substrate concentration affect the rate of enzyme reactions? - CORRECT ANSWER -
Enzymes are not consumed in the reaction, so small amounts of an enzyme can work well on large amo
unts of substrate.
Increasing amounts of substrate will plateau the activity of a fixed amount of enzyme, taking longer to c
onvert substrate into product.
Increasing amounts of enzyme will increase the rate of reaction.
LAB 7: How does pH affect the rate of enzyme reactions? - CORRECT ANSWER -
Changes in pH can affect the functional groups of certain amino acids, which change their charge or inte
rmolecular interactions.
This can influence the structure of the enzyme.
Extreme pH levels can denature enzymes, rendering them nonfunctional.
QUESTIONS WITH CORRECT ANSWERS 2025
LAB 7: catalyst - CORRECT ANSWER -substance that speeds up the rate of a chemical reaction
LAB 7: Enzmes - CORRECT ANSWER -Proteins which serve as catalysts for certain chemical reactions
LAB 7: energy of activation - CORRECT ANSWER -
The amount of energy that reactants must absorb before a chemical reaction will start
LAB 7: Active site of an enzyme - CORRECT ANSWER -
the region of an enzyme that attachesRto a substrate
LAB 7: How do enzymes catalyze reactions? - CORRECT ANSWER -
by lowering the activation energy required for the reaction to occur
LAB 7: What are the seven major properties of enzymes? - CORRECT ANSWER -Most are proteins.
They are highly specific; most will only react with a certain substrate.
They form an enzyme-substrate complex:
E +S↔ES →P +E
They do not affect the direction of a reaction.
They lower the energy of activation of a reaction.
They are not consumed in the reaction.
They are often highly regulated.
, LAB 7: How do inhibitors work? - CORRECT ANSWER -
by preventing reactants from coming together because they have a similar shape to the substrate molec
ule.
Therefore less substrate molecules can bind to the enzymes so the reaction rate is decreased.
LAB 7: How do different substrates affect the rate of enzyme reactions? - CORRECT ANSWER -
The presence or absence of a specific chemical functional group can decide how well the enzyme works
for that reaction.
The ability of the enzyme to work well with certain substrates and not well with other similar substrates
is called specificity.
LAB 7: enzyme specificity - CORRECT ANSWER -
The ability of the enzyme to work well with certain substrates and not well with other similar substrates
LAB 7: How does substrate concentration affect the rate of enzyme reactions? - CORRECT ANSWER -
Enzymes are not consumed in the reaction, so small amounts of an enzyme can work well on large amo
unts of substrate.
Increasing amounts of substrate will plateau the activity of a fixed amount of enzyme, taking longer to c
onvert substrate into product.
Increasing amounts of enzyme will increase the rate of reaction.
LAB 7: How does pH affect the rate of enzyme reactions? - CORRECT ANSWER -
Changes in pH can affect the functional groups of certain amino acids, which change their charge or inte
rmolecular interactions.
This can influence the structure of the enzyme.
Extreme pH levels can denature enzymes, rendering them nonfunctional.
