Cell Structure and Function

Which of the following carbohydrates is a ketohexose?

• Glucose
• Ribose
• Sucrose
• Fructose

What is the function of restriction enzymes in molecular biology?

• Replicate DNA
• Translate RNA
• Modify proteins
• Cut DNA at specific sites

What is the primary structure of a protein?

• Three-dimensional folding
• Quaternary assembly
• Sequence of amino acids
• Secondary helix formation

What is the role of histones in chromatin organization?

• Replicating DNA
• Transcribing DNA
• Repairing DNA
• Packaging DNA into chromatin

What is the term for the pH at which an amino acid has no net charge?

• Optimal pH
• Neutralization point
• Equilibrium point
• Isoelectric point