Write a short note on the types of RNA and their functions.

1. 1 · Open in two lines. RNA (ribonucleic acid) is a usually single-stranded nucleic acid with ribose and uracil. Three main types work together to make protein.
2. 2 · Draw the tRNA cloverleaf. [Diagram: tRNA cloverleaf with acceptor arm (3′ CCA), D arm, anticodon arm, variable arm and TΨC arm]
3. 3 · Main types.
   • mRNA: carries codons from DNA to ribosome; 5′ cap and poly-A tail.
   • tRNA: brings amino acids; anticodon pairs with codon.
   • rRNA: forms ribosomes; peptidyl transferase activity.
4. 4 · Other RNAs. hnRNA (mRNA precursor), snRNA (splicing), miRNA (gene silencing).
5. 5 · Significance. Together they turn the genetic code into protein (translation).
6. 6 · Nutrition link. A missing essential amino acid halts protein synthesis; cereal–pulse mixes supply them all.
7. 7 · Close in one line. Sum up: mRNA is the message, tRNA the carrier, rRNA the factory.

Scoring tip: For 5 marks, a neat cloverleaf and a three-row table are enough.