(a) State the central dogma in molecular biology. Who proposed it? Is it universally applicable? Explain.
(b) List any four properties of a molecule to be able to act as a genetic material

Explanation

(a) Francis Crick proposed the 'central dogma' in molecular biology which states that the genetic information flows from

In some viruses, the flow of information is in reverse direction, that is from RNA to DNA
(b) Properties in a molecule to act as a genetic material: It should be able to generate its replica. It should chemically and structurally be stable It should provide scope for slow changes (mutation) that are required for evolution It should be able to express itself in the form of Mendelian characters.