What do the -ase endings on certain molecules indicate in this context?

What do the -ase endings on certain molecules indicate in this context?

• A. Enzymes or proteins that speed up replication
• B. Lipids that form membranes
• C. Carbohydrates that store energy
• D. Nucleotides that provide energy

Answer: (A)

The ending -ase signals an enzyme, a specific protein that acts as a catalyst to speed up a chemical reaction. In DNA replication, these enzymes are the workhorses that make the process efficient and accurate. For example, helicase unwinds the two DNA strands, DNA polymerase builds the new strands by adding nucleotides, and ligase joins fragments together. Each of these is a protein whose job is to accelerate a precise step in replication. The other options don’t fit this naming pattern. Lipids form membranes, carbohydrates mainly store energy, and nucleotides provide energy or serve as building blocks, but none of these are enzymes ending in -ase. While there are some RNA molecules that can act as catalysts, the conventional -ase names are tied to protein enzymes that drive replication.

The ending -ase signals an enzyme, a specific protein that acts as a catalyst to speed up a chemical reaction. In DNA replication, these enzymes are the workhorses that make the process efficient and accurate. For example, helicase unwinds the two DNA strands, DNA polymerase builds the new strands by adding nucleotides, and ligase joins fragments together. Each of these is a protein whose job is to accelerate a precise step in replication.

The other options don’t fit this naming pattern. Lipids form membranes, carbohydrates mainly store energy, and nucleotides provide energy or serve as building blocks, but none of these are enzymes ending in -ase. While there are some RNA molecules that can act as catalysts, the conventional -ase names are tied to protein enzymes that drive replication.