Which type of membrane protein carries out metabolic reactions?

• A. Enzymatic Proteins
• B. Receptor Protein
• C. Channel Protein
• D. Carrier Protein

Answer: (A)

Enzymatic proteins catalyze metabolic reactions at the membrane by providing active sites where substrates are converted to products, speeding up metabolic pathways. This catalytic role is what distinguishes them from other membrane proteins. Receptor proteins bind signaling molecules but don’t typically accelerate chemical changes; channel proteins form pores for ion movement; carrier proteins change shape to move substances across the membrane, often without catalyzing a chemical reaction themselves. So, the membrane protein type that carries out metabolic reactions is the enzymatic proteins.