Explanation:
Plate 1: Only transformed cells will grow on this plate/these plates.
Role: Shows that competent cells need to be transformed with intact DNA.
Plate 2: Shows the competent cells are viable.
Role: Tests this assumption.
Plate 3: Shows that the cells we originally extracted were kanamycin resistant.
Role: Tests this assumption.
Plate 4: Solvent control group.
Role: Tests this assumption.
So, the matching is as follows:
Plate 1: Shows that competent cells need to be transformed with intact DNA.
Plate 2: Tests this assumption.
Plate 3: Tests this assumption.
Plate 4: Solvent control group.