What is the role of electrophoresis in biotechnology?

• A. To sequence DNA strands directly
• B. To separate DNA, RNA, or proteins based on size and charge
• C. To enhance gene amplification techniques
• D. To mutate genes for research purposes

Answer: (B)

Electrophoresis plays a crucial role in biotechnology by serving as a technique to separate DNA, RNA, or proteins based on their size and charge. This method utilizes an electric field to drive the molecules through a gel matrix, where smaller molecules move faster and farther than larger ones. This separation is invaluable for a variety of applications, including analyzing the size of DNA fragments after restriction enzyme digestion, assessing RNA quality, or studying protein purity and molecular weight.

By separating these biomolecules, researchers can visualize and quantify them, which is essential for downstream applications such as cloning, sequencing, or protein analysis. Thus, the ability to separate molecules by their physical characteristics not only facilitates the study of genetic material but also contributes to advancements in diagnostics, therapeutics, and fundamental biological research.