Cell Structure and Function

What is the role of coenzymes in enzyme action?

• Provide structural stability
• Store energy
• Assist in catalytic activity
• Regulate gene expression

What is the function of enzymes?

• Structural support
• Energy storage
• Immune defense
• Biological catalysts

What is the isoelectric point of an amino acid?

• pH at which it becomes acidic
• pH at which it becomes basic
• pH at which it has no net charge
• pH at which it loses its amino group

What is denaturation of a protein?

• Synthesis of new proteins
• Increase in solubility
• Loss of biological activity due to structural disruption
• Formation of new peptide bonds

What is the quaternary structure of a protein?

• Sequence of amino acids
• Three-dimensional folding
• Arrangement of multiple subunits
• Secondary helix formation