Enzyme MCQs
Enzyme MCQs
Try to answer these Enzyme MCQs and check your understanding of the Enzyme subject. Scroll down and let's begin!
1: Reactants called _______ bind to an enzyme's _______ site where a chemical reaction takes place.
A. Substrates; active
B. Catalyst; Allosteric
C. Allosteric; substrates
D. None of these
2: Some ribosomes are suspended in the cytosol of a cell, whereas other ribosomes _______.
A. Make proteins inside the nucleus
B. Are found on the plasma membrane
C. Are attached to the smooth endoplasmic reticulum
D. Are attached to the outside of the nucleus
3: The body uses _____ to control reactions within cells.
A. Vitamins
B. Monomers
C. Starches
D. Enzymes
4: Organic molecules that end in the suffix "-ase" often function as ________ molecules.
A. Ribosomal
B. Organelle
C. Enzymatic
D. Antiseptic
5: What are enzymes?
A. Substances that absorb light and produce energy
B. Proteins that speed up chemical reactions without being consumed
C. Molecules that transport oxygen in the blood
D. Lipids that store energy in cells
6: Enzymes are classified as which type of biological macromolecule?
A. Carbohydrates
B. Lipids
C. Proteins
D. Nucleic acids
7: What is the role of enzymes in chemical reactions?
A. To provide energy for reactions
B. To consume reactants in reactions
C. To lower the activation energy and speed up reactions
D. To inhibit the formation of products
8: The specific region on an enzyme where the substrate binds is called the:
A. Active site
B. Inactive site
C. Binding site
D. Reaction site
9: Enzymes are highly specific in their actions. This specificity is due to the:
A. Enzyme's size and shape
B. Enzyme's charge and polarity
C. Enzyme's ability to bind multiple substrates
D. Complementary fit between the enzyme's active site and the substrate's shape
10: What happens to enzymes under extreme temperature or pH conditions?
A. They denature and lose their activity
B. They undergo replication
C. They become more efficient
D. They break down into smaller molecules
11: Which of the following factors can affect enzyme activity?
A. Pressure and volume
B. Light intensity and wavelength
C. Temperature and pH
D. Magnetic fields
12: The substance on which an enzyme acts to catalyze a chemical reaction is called the:
A. Coenzyme
B. Cofactor
C. Substrate
D. Product
13: What is the term used when an enzyme's activity is regulated by the binding of a specific molecule to a site other than the active site?
A. Competitive inhibition
B. Allosteric regulation
C. Irreversible inhibition
D. Non-competitive inhibition
14: Which of the following statements is true regarding enzymes in biological systems?
A. Enzymes are only involved in anabolic reactions.
B. Enzymes increase the overall energy input required for a reaction.
C. Enzymes are reusable and can catalyze multiple reactions.
D. Enzymes are not affected by changes in the cellular environment.
List of Enzyme MCQs Multiple C...
Available in:
Enzyme MCQs
