What is the natural role of enzymes in bacteria?

What is the natural role of enzymes in bacteria?

• A. Digest lactose
• B. Repair DNA
• C. Protect bacteria from bacteriophage viruses
• D. Synthesize antibiotics

Answer: (C)

Enzymes in bacteria mainly act as fast-acting catalysts that keep the cell functioning and protected. A key natural role is defending the cell against invading viruses (bacteriophages). Enzymes such as restriction enzymes cut foreign phage DNA, and CRISPR-Cas systems use enzymes to recognize and destroy viral genomes. This antiviral activity is a fundamental, ongoing job for many bacterial enzymes, helping the cell survive infections. Digesting lactose is a nice example of a metabolic enzyme function found in some bacteria, but not all. DNA repair enzymes exist in all cells, but that’s a maintenance task rather than a specific defensive action against phages. Producing antibiotics is something some bacteria do, but it isn’t a universal or primary function of bacterial enzymes. The phage defense role best captures what enzymes naturally do to help bacteria survive in a world full of viruses.

Enzymes in bacteria mainly act as fast-acting catalysts that keep the cell functioning and protected. A key natural role is defending the cell against invading viruses (bacteriophages). Enzymes such as restriction enzymes cut foreign phage DNA, and CRISPR-Cas systems use enzymes to recognize and destroy viral genomes. This antiviral activity is a fundamental, ongoing job for many bacterial enzymes, helping the cell survive infections.

Digesting lactose is a nice example of a metabolic enzyme function found in some bacteria, but not all. DNA repair enzymes exist in all cells, but that’s a maintenance task rather than a specific defensive action against phages. Producing antibiotics is something some bacteria do, but it isn’t a universal or primary function of bacterial enzymes. The phage defense role best captures what enzymes naturally do to help bacteria survive in a world full of viruses.