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Molecular basis of Inheritance — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYMolecular basis of Inheritance2 Marks
Question
Write the transcribed RNAs from DNA strand with base sequences :
(a) TAG TAC АСТ,
(b) GAT CAT АСТ,
(c) TAC AGT ATT
What is the name and specific function of the last codon in $m$-RNA?
✓

Answer

(a) DNA : TAG TAC ACT (Transcribed), $m$-RNA AUG AUG UGA
(b) DNA : Base sequence GAT CAT ATC (Transcribed) $m$-RNA CUA GUA UAG
(c) DNA : Base sequence TAC AGT ATT Transcribed $m$-RNA AUG UCA UAA
UGA, UAG and UAA are termination code, they stop the chain of $m$-RNA formation meaning stops protein synthesis. UGA is called opal, UAG is called Amber and UAA is known as Ochre.

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