Enzymes in Biochemistry

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Questions and Answers

What is the main function of enzymes in biochemical reactions?

Regulate the rate of biochemical reactions (correct)
Terminate biochemical reactions
Have no role in biochemical reactions
Initiate biochemical reactions

What type of molecules are required for the activity of certain conjugated enzymes?

Carbohydrates
Proteins
Lipids
Organic and inorganic molecules (correct)

Which type of enzymes retain their original names with no hint of the associated enzymatic reaction?

Sucrase and trypsin
Lactate dehydrogenase and adenylyl cyclase
Glucosidase and urease
Trypsin and pepsin (correct)

Which type of enzymes retain their original names with no hint of the associated enzymatic reaction?

Ribozymes (C) Signup and view all the answers

What is the main function of enzymes in biochemical reactions?

Regulate the rate of reactions (C) Signup and view all the answers

Match the following with their correct description:

Enzymes = Biocatalysts mainly proteins that regulate the rate of biochemical reactions Nomenclature = Enzyme names with the suffix '-ase' attached to the substrate or description of the action performed Holoenzyme = Active enzyme with its nonprotein component (cofactor) Cofactors = Organic or inorganic molecules required for the activity of certain conjugated enzymes Signup and view all the answers

Match the following terms with their correct definition:

Ribozymes = Except for these, virtually all enzymes are protein in nature Apoenzyme = Enzyme without its cofactor, and is inactive Conjugated proteins (holoenzyme) = Some enzymes are these, referring to the active enzyme with its nonprotein component (cofactor) Simple proteins = Some enzymes are these, excluding the conjugated proteins Signup and view all the answers

Match the following enzyme names with their correct nomenclature:

Glucosidase = Enzyme name with the suffix '-ase' attached to the substrate Lactate dehydrogenase = Enzyme name without a hint of the associated enzymatic reaction Adenylyl cyclase = Enzyme name with the suffix '-ase' attached to a description of the action performed Trypsin = Enzyme retaining its original name without hint of associated enzymatic reaction Signup and view all the answers

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Study Notes

Enzymes and Their Functions

Enzymes act as biological catalysts, speeding up biochemical reactions by lowering activation energy.
They play a crucial role in metabolic pathways, facilitating digestion, energy production, and biosynthesis.

Conjugated Enzymes

Conjugated enzymes require specific non-protein molecules known as cofactors or coenzymes for their activity.
Cofactors can include metal ions (e.g., zinc, magnesium) while coenzymes are often derived from vitamins (e.g., NAD, FAD).

Enzyme Nomenclature

Enzymes that retain their original names without indicating the associated reaction are typically known as 'systematic' or 'recommended' names.
This type often does not reflect the specific substrate or type of chemical reaction catalyzed.

Enzyme Descriptions and Definitions

Accurate matching of terms to definitions is essential in understanding enzyme functions, mechanisms, and classifications.
Familiarity with nomenclature helps to understand enzymatic reactions and their biological significance.