Question

multiple choice question

besides proteins, which type of molecule has been shown to have catalytic activity?

rna
lipid
carbohydrate
dna

Explanation:

Identify the biological catalysts besides proteins

Most biological catalysts are proteins called enzymes. However, certain RNA molecules, known as ribozymes, also possess catalytic activity.

Evaluate the given options

• RNA: Known to form ribozymes which catalyze biochemical reactions (e.g., peptide bond formation in ribosomes).
• lipid: Serve as structural components and energy storage, not biological catalysts.
• carbohydrate: Serve as energy sources and structural components, not biological catalysts.
• DNA: Primarily functions as genetic storage, lacking natural catalytic activity in vivo.

Answer:

• RNA (Correct answer)
• lipid
• carbohydrate
• DNA