DNA staining by ethidium bromide is followed by the exposure to UV rays. Now DNA is seen as bands of :

Q. DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as :

Q. Which of the following statements about agarose gel electrophoresis is/are incorrect?

I. It is a common method used to separate the DNA fragments based on their size.
II. The DNA fragments can be detected by ethidium bromide staining followed by exposure to ultraviolet rays.
III. The movement of DNA is modulated by the strength of the electric field.
IV. The electric field allows the migration of positively charged DNA towards the negative terminal.

Q. A mixture of fragmented DNA was electrophoresed in an agarose gel. After staining the gel with ethidium bromide, no DNA bands were observed. What could be the reason?

Q. Ethidium bromide is a stain that binds specifically to nucleic acids (DNA or RNA). If viewed under ultraviolet light, it gives ________ color to the nucleic acid bands.

Q. With respect to DNA fragmentation
Statement A : Gel electrophoresis is an important processes.
Statement B : After staining with ethidium bromide it has to be exposed to U.V. light.