Identify the incorrect statements pertaining to gel electrophoresis:(a) DNA is loaded on gel towards the anode.(b) Gel concentration does not affect DNA movement.(c) Smaller DNA fragments travel greater distances.(d) Pure DNA can be visualized directly by UV radiation.
- A(a), (c) and (d)
- B(a), (b) and (c)
- C(b), (c) and (d)
- D(a), (b) and (d)
Solution & Step-by-step Explanation
(a) Incorrect: DNA is negative and is loaded at the cathode to move towards the anode.(b) Incorrect: Higher gel concentration increases the "sieving effect," slowing down movement.(c) Correct.(d) Incorrect: DNA must be stained (e.g., with Ethidium bromide) to be seen under UV.