The Molecule That Can Carry Foreign DNA into Host Cells

Question

The molecule that can carry foreign DNA into host cells is a(n)____.  
A) cloning vector
B) transcriptase
C) DNA ligase
D) endonuclease
E) DNA polymerase

Accepted Answer

The figure shows the process of creating recombinant DNA using a cloning vector, which is a DNA molecule that is used to transfer foreign DNA into host cells. Therefore, choice A is the correct answer. The other options in the question, such as transcriptase, DNA ligase, endonuclease, and DNA polymerase, are enzymes that may be involved in the process of creating recombinant DNA, but they are not the molecule that carries the foreign DNA into the host cell.