A molecule that can act as a genetic material having characteristics ………

Genes are

Which of the following is false for $RNA$?

$(i)$ $RNA$ can directly code for the synthesis of proteins

$(ii)$ It is very common process to synthesis $DNA$ from $RNA$

$(iii)$ $RNA$ is used as genetic material only in human

$(iv)$ One polynucleotide chain is present in $RNA$

Which of the following was used by Hershey and Chase to prove that $DNA$  is the chemical basis of heredity

Describe different experiment which proves that DNA is a Genetic material.