19 Questions
What is the role of enzymes in reducing activation energy?
Facilitating collisions and binding of substrates
How do enzymes achieve specificity in binding to substrates?
By using precise 3-D shapes of the active site
What is the function of cofactors and coenzymes in enzyme action?
Aiding in catalyzing reactions
What is the main role of prosthetic groups in enzyme function?
Permanently binding and aiding in catalysis
How do enzymes alter environments to promote catalysis?
By utilizing amino acid side chains to enhance reactivity
What is the mechanism of reversible inhibition involving covalent bonding?
Irreversible inhibition
What is the regulation of a pathway by one of the products on this pathway known as?
Feedback inhibition
What type of molecule binds to the allosteric site of an enzyme and keeps the enzyme active or causes an increase in its activity?
Activator
What happens to the rate of reaction as temperature increases above the optimal range for enzyme function?
The enzyme begins to denature
What happens to the rate of reaction as substrate concentration increases up to saturation levels?
The rate of reaction remains constant
In redox reactions, which element typically undergoes reduction?
The more electronegative element
What is the primary pair of agents involved in cellular processes, with one form being the reduced form and the other being the oxidized form?
Coenzyme NADH and NAD+
What type of reaction involves products containing more energy than the reactants and is considered non-spontaneous?
Endergonic reaction
What does oxidation involve in a redox reaction?
The loss of electrons
What is the role of dehydrogenase enzymes in cellular processes?
Oxidizing a substrate and transferring hydrogen ions
What happens to the rate of reaction as substrate concentration increases up to saturation levels?
It increases but then plateaus
What do redox reactions involve in terms of energy transfer?
Releasing stored potential energy
What is the transfer of electrons from one substance to another known as in a redox reaction?
Oxidation-reduction reaction
What is the oxidized form of coenzyme NADH?
NAD+
Test your knowledge about enzymes, biological catalysts that accelerate chemical reactions, and their interaction with substrate molecules. Learn about the diversity of enzyme structures, specific binding to substrates, and their crucial role in biological processes.
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