The Image Below Shows a Sanger DNA Sequencing Gel Where

Multiple Choice

The image below shows a Sanger DNA sequencing gel where one ingredient was left out of all sequencing reactions. The top of the gel is the anode and the bottom of the gel is the cathode. The gel was turned on and ran correctly. What is the MOST likely missing ingredient?

A) dNTPs
B) ddNTPs
C) radioactive DNA primer
D) DNA polymerase
E) template DNA