Explain (in one or two lines) the function of the followings: (a) Promoter (b) tRNA (c) Exons

(a) Promoter:- Promoter is a region of DNA that helps in initiating the process of transcription. It serves as the binding site for RNA polymerase.
(b) tRNA:- tRNA or transfer RNA is a small RNA that reads the genetic code present on mRNA. It carries specific amino acid to mRNA on ribosome during translation of proteins.
(c) Exons:- Exons are coding sequences of DNA in eukaryotes that transcribe for proteins.

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