Codon Structure & Stop Signals — NEET Biology
📚 Practice ConceptThe codon is triplet. 61 codons code for amino acids and 3 codons do not code for any amino acids, hence they function as stop codons.
Which of the following statements about the salient features of the genetic code are NOT correct? S1. The genetic code is a doublet code, where two nucleotides form a codon, coding for twenty amino acids. S2. Degeneracy of the genetic code implies that one amino acid can be specified by multiple codons, with the third base of the codon often being less specific. S3. The genetic code is universally applicable from bacteria to humans, coding for the same amino acids, without any exceptions. S4. The codon is read in mRNA in a non-overlapping and contiguous manner, ensuring that each nucleotide is part of only one codon and there are no gaps. S5. AUG always functions as an initiator codon and solely codes for Methionine, never for any other amino acid. S6. UAA, UAG, and UGA are referred to as nonsense codons because they do not code for any specific amino acids, leading to termination of translation.
Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.