Exemplar Problems

Question:

Explain (in one or two lines) the function of the followings:

(a) Promoter

(b) tRNA

(c) Exons

Answer:

(a) Promotes the initiation of transcription by RNA polymerase, serving as a binding site for RNA polymerase to start transcription of a gene.

(b) tRNA (transfer RNA) carries amino acids to the ribosome during protein synthesis and matches them with the codons on mRNA.

(c) Exons are coding regions of genes that contain information for protein synthesis and are transcribed and translated into functional parts of proteins.