Sugar found in $RNA$.

Write a short note on the $RNA$ World.

Which sugar is present in the backbone of $RNA$?

Which of the following $RNA$ is most abundant in an animal cell?

How many nucleotides does a $t-RNA$ molecule typically contain?

Which of the following statements is false for $RNA$?
$(i)$ $RNA$ can directly code for the synthesis of proteins
$(ii)$ It is a very common process to synthesize $DNA$ from $RNA$
$(iii)$ $RNA$ is used as genetic material only in humans
$(iv)$ One polynucleotide chain is present in $RNA$