BIOC 3021 Exam 1 Questions With Complete Solutions
How does enzyme activity change with temperature and pH?
Increases with temperature until denaturation; optimal activity
occurs near physiological pH
What normally happens in an enzyme reaction as the
temperature rises?
Has a steep increase at first and then decreases at higher
temperatures
Does an enzyme change the equilibrium constant of a chemical
reaction?
No
What is activation energy?
The change in energy between the substrate and the transition
state intermediate of an enzyme reaction
Which of these atoms is NOT usually found as an ion in living
things?
Ba
What type of bond helps form alpha-helices in proteins and pairs
bases in DNA?
Hydrogen bonds
Is acetic acid a strong acid?
, NO
This is because it only partly dissociates, so most of the acetic
acid molecules stay whole. That's why it's called a weak acid.
What functional group has a carbon double-bonded to oxygen?
Carbonyl group
Which type of molecule releases the most energy when
oxidized?
What type of bond allows cis/trans isomers to exist?
Double bonds (C=C)
What functional group has a nitrogen bonded to 3 carbons?
Amine
Which kind of molecule is considered the most reduced form of
carbon?
Methane
When a carboxylic acid reacts with an amine, what type of
molecule forms?
Amide
Which compound represents the most oxidized form of carbon?
Carbon Dioxide
When a carboxylic acid reacts with an alcohol, what type of
compound is formed?
Ester
How does enzyme activity change with temperature and pH?
Increases with temperature until denaturation; optimal activity
occurs near physiological pH
What normally happens in an enzyme reaction as the
temperature rises?
Has a steep increase at first and then decreases at higher
temperatures
Does an enzyme change the equilibrium constant of a chemical
reaction?
No
What is activation energy?
The change in energy between the substrate and the transition
state intermediate of an enzyme reaction
Which of these atoms is NOT usually found as an ion in living
things?
Ba
What type of bond helps form alpha-helices in proteins and pairs
bases in DNA?
Hydrogen bonds
Is acetic acid a strong acid?
, NO
This is because it only partly dissociates, so most of the acetic
acid molecules stay whole. That's why it's called a weak acid.
What functional group has a carbon double-bonded to oxygen?
Carbonyl group
Which type of molecule releases the most energy when
oxidized?
What type of bond allows cis/trans isomers to exist?
Double bonds (C=C)
What functional group has a nitrogen bonded to 3 carbons?
Amine
Which kind of molecule is considered the most reduced form of
carbon?
Methane
When a carboxylic acid reacts with an amine, what type of
molecule forms?
Amide
Which compound represents the most oxidized form of carbon?
Carbon Dioxide
When a carboxylic acid reacts with an alcohol, what type of
compound is formed?
Ester
