39 Questions
What is true about nucleophiles and electrophiles?
All of these answers are correct
Which of the following enzyme classifications catalyzes redox reactions?
Oxidoreductases
What makes the electrophile 'electron deficient'?
It has a positive charge
In the Krebs cycle, which molecule is oxidized to make Fumerate?
Succinate
What enzyme carries out the reaction below?
mutase
In the Krebs cycle, which molecule is reduced to make NADH?
NAD
What specific type of enzyme do you think would catalyze the reaction below?
dehydratase
What type of enzyme catalyzes the transfer of a phosphate from ATP to another molecule other than water?
kinase
What are FAD/FADH2?
Coenzymes
What is an oxidase reaction?
removes H and donates it to oxygen
What type of oxidoreductase removes H's and donates them to a molecule other than oxygen?
Dehydrogenases
What is the role of a phosphatase?
removes a phosphate group from a monophosphate (protein)
What is the definition of a polymerase?
transfer of a monomer to a polymer
ATPase is responsible for...
hydrolyzing ATP to release a phosphate group
What type of biomolecule is UDP?
Nucleotide
Which of the following enzyme classifications synthesizes molecules by catalyzing the transfer of a group from one molecule to another?
Transferases
Why is UDP a better leaving group than OH?
It has a lone pair of electrons
What type of hydrolase enzyme is being used in the reaction shown below?
G6P -> Glucose
Phosphatase
What is the mechanism often used by transferases in synthesizing molecules?
Nucleophilic substitution
What is the atom with a lone electron pair in nucleophilic substitution?
Nucleophile
Which type of enzyme is responsible for the removal of water to form a double bond in a molecule?
Dehydratase
What is the name of the enzyme that adds or removes a carboxyl group from an organic compound?
Decarboxylase
What type of enzyme joins two molecules by creating a new C-C bond?
Synthase
What is the name of the enzyme that interconverts the groups around an asymmetric carbon in a molecule that has more than one asymmetric carbon?
Epimerase
What type of enzyme catalyzes various reactions that join two molecules with the use of ATP for energy?
Ligase
What is the name of the enzyme that joins glutamate and cysteine to form Îł-glutamylcysteine?
Glutamate-cysteine ligase
Which type of enzyme is responsible for the elimination of a carboxyl group from an organic compound?
Decarboxylase
What is the name of the enzyme that interconverts the groups around an asymmetric carbon in a molecule that only has one asymmetric carbon?
Racemase
What type of enzyme is responsible for the addition of water to a molecule?
Hydratase
What is the name of the enzyme that converts citrate to isocitrate in the citric acid cycle?
Aconitate hydratase
Match the enzymes with their classification of reactions:
Dehydrogenase = Oxidoreductase Kinase = Transferase Phosphatase = Hydrolase Hydratase = Lyase
Match the following enzymes with their classification of reactions:
Oxydase = Oxidoreductase Polymerase = Transferase ATPase = Hydrolase Dehydratase = Lyase
Match the following enzymes with their classification of reactions:
Decarboxylase = Lyase Synthase = Lyase Mutase = Isomerase Epimerase = Isomerase
Match the following enzymes with their classification of reactions:
Racesemase = Isomerase synthetase = Ligase Hydratase = Lyase Mutase = Epimerase
Match the following lyase enzymes with the type of reaction they are:
Hydratase = Addition Dehydratase = Elimination Decarbolzyase = Elimination Synthase = Condensation
What enzyme makes a new C-C bond from the joining of 2 molecules?
Synthase
Which enzyme transfers a functional group intermolecularly?
Mutase
Match the isomerase enzyme to its function:
Epimerase = Interconversion of a molecule around an asymetrical C in a molecule with more than 1 asymmetrical C Racemase = Interconversion of groups around an asymmetrical C in a molecule with 1 asymmetrical C Mutase = transfer of a functional group intermolecularly
What is the function of a ligase?
joins 2 molecules with the use of ATP
Test your knowledge of enzyme classifications and their role in redox reactions with this quiz. Learn about the different classes of enzymes and how they contribute to anabolic and catabolic processes.
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