Question

1. a protein composed of two identical subunits is referred to as a:

a. homodimer b. heterodimer c. monomer d. tetramer

1. the peptide bond that links amino acids in a protein is formed by:

a. hydrogen bonding b. ionic bonding
c. condensation (dehydration) reaction d. hydrolysis reaction

Explanation:

1. A homodimer is a protein with two identical subunits. A heterodimer has two different subunits. A monomer is a single unit. A tetramer has four subunits.
2. A condensation (dehydration) reaction forms peptide bonds by removing water. Hydrogen bonding and ionic bonding are types of interactions, not bond - forming reactions. Hydrolysis reactions break bonds by adding water.

Answer:

1. A. Homodimer
2. C. Condensation (dehydration) reaction