DNA fragments are :

Q. DNA fragments are

Q.

Why are protons positively charged, electrons negatively charged and neutrons have neither negative or positive charge?

Q. Electric current is the flow of particles with
(a) a negative charge.
(b) a positive charge.
(c) both positive and negative charges flowing opposite to each other.
(d) either positive or negative charge depending on the material.

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.