Question

Explain in one or two lines) the function of the followings
a) Promoter
b) tRNA
c)exons​

Answer 1

Answer:

a)promoter: it promotes the transcription of DNA into mRNA

b)tRNA: it reads the sequence of mRNA with its anti codon loop and polymerise the chain of poly peptides {proteins}

c)exons:these are coding parts of mRNA and codes for amino acids

Answer 2

➡a) promoter :- the promoter flank structural gene in a transportation unit.

the promoter is said to be located towards 5’ — end the structural gene.

it is DNA sequence that provides building site of RNA polymerase, and it is the presence of promoter in a transportation unit that also defines the the template and coding strands.

b) tRNA :- it performs the adaptor role that on one hand reads the code and on other hand would bind to specific amino acids.

c) Exons :- the coding sequences or expressed sequences in eukaryotic genes are called exons.

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