What was the purpose of adding lysis buffer to cell culture?

What was the purpose of adding lysis buffer to cell culture?

• A. To break open cells and release proteins.
• B. To stabilize cell membranes.
• C. To promote cell growth.
• D. To increase DNA replication.

Answer: (A)

Lysis buffer is used to break open cells and release their proteins. The detergent components disrupt the lipid membranes, freeing intracellular proteins and other contents so they can be analyzed. The buffer also helps keep proteins intact by maintaining pH and ionic strength and often includes protease inhibitors to prevent degradation during extraction. This is the main reason for adding lysis buffer in cell culture experiments. Stabilizing cell membranes would keep cells intact, which is the opposite of what lysis buffer does. Promoting cell growth comes from nutrients and proper culture conditions, not from a lysis step. Lysis buffer does not drive DNA replication; replication is controlled by the cell cycle.

Lysis buffer is used to break open cells and release their proteins. The detergent components disrupt the lipid membranes, freeing intracellular proteins and other contents so they can be analyzed. The buffer also helps keep proteins intact by maintaining pH and ionic strength and often includes protease inhibitors to prevent degradation during extraction. This is the main reason for adding lysis buffer in cell culture experiments.

Stabilizing cell membranes would keep cells intact, which is the opposite of what lysis buffer does. Promoting cell growth comes from nutrients and proper culture conditions, not from a lysis step. Lysis buffer does not drive DNA replication; replication is controlled by the cell cycle.