26 Questions
What is the term for enzymes that are formed of proteins only?
Simple enzymes
Which group of enzymes catalyze the reactions of oxidation and reduction?
Oxidoreductases
What is the role of NAD+ as a coenzyme?
It acts as a hydrogen carrier
What is the term for enzymes that are formed of several subunits, each with a different catalytic activity?
Complex enzymes
Which group of enzymes catalyze the transfer of groups other than hydrogen from one substrate to another?
Transferases
Which of the following best describes enzymes?
Biological catalysts that are mostly protein in nature and not consumed within the reaction
What is the difference between catalyzed and uncatalyzed reactions?
Enzymes increase the rate of reaction without being consumed, while uncatalyzed reactions occur at a slower rate
Which statement about the general properties of enzymes is true?
They act within a moderate pH and temperature range
What is optical specificity (stereospecificity) in relation to enzymes?
Enzymes act only on one of two isomers
What is group specificity in relation to enzymes?
Enzymes act on a specific group or linkage
Enzymes located outside the cell are called housekeeping enzymes
False
Holoenzyme is the functional unit of simple enzymes
False
Metal cofactors are considered as organic cofactors
False
NAD+ acts as a hydrogen carrier
True
Mg+2 acts as an electron withdrawer facilitating the action of DNA polymerase
False
Fatty acid synthase enzyme is an example of a simple enzyme
False
Oxidoreductases catalyze the reactions of oxidation and addition of oxygen
True
Transferases catalyze the transfer of groups other than hydrogen from one substrate to another
True
Synthases are not considered transferases
False
Isomerases catalyze the introduction of a functional group into a molecule
False
Enzymes are consumed within the reaction they catalyze.
False
Not all enzymes are protein in nature.
True
Enzymes act within a wide pH and temperature range.
False
Optical specificity refers to enzymes acting on both isomers of a compound.
False
Group specificity involves enzymes acting on a specific group or linkage.
True
Intracellular enzymes are secreted from the cell where they function.
False
Test your knowledge on the general properties and classification of enzymes with this quiz. Explore topics like the location of enzyme reactions, inducible enzymes, and the constitutional nature of enzymes.
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