What is a protein catalyst that speeds up metabolic reactions called?

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Multiple Choice

What is a protein catalyst that speeds up metabolic reactions called?

Explanation:
Enzymes are proteins that act as biological catalysts, speeding up metabolic reactions by lowering the activation energy required to reach the transition state. They have specific active sites that bind substrates, making the reaction proceed much faster without the enzyme being consumed. Antibodies are immune proteins that bind targets rather than accelerate chemical reactions. Nucleotides are the building blocks of DNA and RNA, not catalysts. ATP is an energy currency of the cell that powers many reactions, but it is not itself a catalyst. So the term that fits a protein catalyst for metabolism is enzyme.

Enzymes are proteins that act as biological catalysts, speeding up metabolic reactions by lowering the activation energy required to reach the transition state. They have specific active sites that bind substrates, making the reaction proceed much faster without the enzyme being consumed. Antibodies are immune proteins that bind targets rather than accelerate chemical reactions. Nucleotides are the building blocks of DNA and RNA, not catalysts. ATP is an energy currency of the cell that powers many reactions, but it is not itself a catalyst. So the term that fits a protein catalyst for metabolism is enzyme.

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