Dpr is a DPS-like peroxide resistance gene.

Dpr is a DPS-like peroxide resistance gene.

• A. Catalase-like protein
• B. Dpr is a DPS-like peroxide resistance gene
• C. A zinc transporter
• D. A ribosomal protein

Answer: (B)

The idea being tested is recognizing the specific family and function of Dpr in protecting cells from peroxide stress. Dpr is a member of the DPS-like family, which are ferritin-like proteins that help resist oxidative damage by binding iron and limiting Fenton chemistry, rather than by directly breaking hydrogen peroxide. This makes Dpr a peroxide resistance protein, classified as DPS-like, rather than a catalase enzyme, a zinc transporter, or a ribosomal protein. Catalase-like proteins actively decompose hydrogen peroxide into water and oxygen, which is a different mechanism from what DPS-like proteins use. A zinc transporter would be a membrane protein dedicated to metal ion movement, not oxidative stress protection, and a ribosomal protein is part of the protein synthesis machinery, not involved in peroxide resistance. Therefore, identifying Dpr as a DPS-like peroxide resistance gene correctly reflects its role and family.

The idea being tested is recognizing the specific family and function of Dpr in protecting cells from peroxide stress. Dpr is a member of the DPS-like family, which are ferritin-like proteins that help resist oxidative damage by binding iron and limiting Fenton chemistry, rather than by directly breaking hydrogen peroxide. This makes Dpr a peroxide resistance protein, classified as DPS-like, rather than a catalase enzyme, a zinc transporter, or a ribosomal protein. Catalase-like proteins actively decompose hydrogen peroxide into water and oxygen, which is a different mechanism from what DPS-like proteins use. A zinc transporter would be a membrane protein dedicated to metal ion movement, not oxidative stress protection, and a ribosomal protein is part of the protein synthesis machinery, not involved in peroxide resistance. Therefore, identifying Dpr as a DPS-like peroxide resistance gene correctly reflects its role and family.