Question

1. (2001-27) according to the graph, addition of the enzyme amylase causes the reaction to —

a. slow down
b. speed up
c. take in heat
d. give off heat

1. (2002-22) peroxidase is an enzyme that breaks down hydrogen peroxide in cells. it accomplishes this because of its structure. what part of the enzyme is involved in catalytic activity?

a. quaternary structure
b. active site
c. binding pocket
d. pleated sheet

1. (2004-43) proteins are formed from monomers (subunits) called —

a. nucleic acids
b. fatty acids
c. nucleotides
d. amino acids

Explanation:

Question 3

Enzymes are biological catalysts. Catalysts increase the rate of a chemical reaction without being consumed in the process. So, adding amylase (an enzyme) should speed up the reaction. Options a is incorrect as enzymes don't slow reactions. Options c and d relate to heat changes, but enzymes affect reaction rate, not heat absorption/release directly.

The active site of an enzyme is the region where the substrate binds and the catalytic reaction occurs. The quaternary structure is about multiple subunits (not catalytic site), binding pocket is not the term for catalytic activity, and pleated sheet is a secondary structure element, not the catalytic part. So the active site is involved in catalysis.

Proteins are polymers made up of monomeric units called amino acids. Nucleic acids are monomers of nucleic acids (like DNA/RNA), fatty acids are part of lipids, and nucleotides are monomers of nucleic acids. So the monomers of proteins are amino acids.

Answer:

b. speed up

Question 4