MDCAT Biology MCQ #1160

MDCAT Biology MCQ #1160

1. Question 1

   Q1. What is the function of a selectable marker in a cloning vector?

   • A) To identify the insert size
   • B) To facilitate cloning of large DNA fragments
   • C) To select cells that have taken up the vector
   • D) To enhance expression of the insert

   Answer: To select cells that have taken up the vector

   Explanation: Selectable markers allow identification of cells containing the vector; they don't directly affect insert size or expression.