31. What is the function of antibodies in the immune system?
a) Enzyme synthesis
b) Protein synthesis
c) Cell signaling
d) Defense against pathogens
32. What is the function of an enzyme in cells?
a) Energy storage
b) Information storage
c) Catalyst for chemical reactions
d) Structural support
33. Which of the following is an example of a quaternary structure in proteins?
a) Alpha helix
b) Amino acid sequence
c) DNA binding
d) Hemoglobin
34. Which of the following is not a function of nucleic acids in cells?
a) Energy storage
b) Information storage
c) Protein synthesis
d) Cell signaling
35. What is the primary structure of nucleic acids?
a) The sequence of amino acids
b) The folding of the nucleic acid chain
c) The interaction between multiple nucleic acid chains
d) The sequence of nucleotides
