Question

an enzyme inhibitor works with the enzyme in a chemical reaction. which statement best describes how an enzyme inhibitor and an enzyme work in a catalyzed reaction?
o a the enzyme inhibitor catalyzes the reverse reaction, which counteracts the work of the enzyme
o b the enzyme inhibitor attacks and destroys the enzyme, which prevents the enzyme from helping in the reaction
o c the enzyme inhibitor binds to the products of the reaction, which makes the work of the enzyme unproductive
o d the enzyme inhibitor fits into the enzymes active site, which prevents the enzyme from catalyzing the reaction
question 18 (4 points)
(01.02 mc)
why is the sequence of nucleotides important to the properties of a nucleic acid?
o a it stores energy
o b it retains and transmits important biological information
o c it stores energy and provides covering to avoid water loss
o d it stores energy and provides structural support for cells

Explanation:

• For the first question: Enzyme inhibitors work by binding to the enzyme's active site (in competitive inhibition) or another site (in non - competitive inhibition). Option d correctly describes that the inhibitor fits into the enzyme's active site (a common mode of action for competitive inhibitors) preventing the enzyme from catalyzing the reaction. Option a is wrong because inhibitors do not catalyze reverse reactions. Option b is incorrect as inhibitors do not destroy the enzyme. Option c is wrong as inhibitors do not bind to products.
• For the second question: Nucleic acids (DNA and RNA) have nucleotides in a specific sequence. DNA stores and transmits genetic (biological) information. RNA also has roles in information transfer (e.g., mRNA, tRNA). Option a is incorrect as storing energy is more of a role for ATP (a nucleotide - like molecule but not a nucleic acid in the polymer sense) or other energy - storage molecules like glycogen. Option c is wrong as covering to avoid water loss is a role of lipids (e.g., cuticle in plants made of wax - a lipid). Option d is incorrect as structural support for cells is a role of proteins (e.g., cytoskeleton proteins) or cellulose (a carbohydrate in plant cell walls).

Answer:

For the first question: d. The enzyme inhibitor fits into the enzyme's active site, which prevents the enzyme from catalyzing the reaction.
For the second question: b. It retains and transmits important biological information.