Prepare for NEET Biology Molecular Basis of Inheritance (Genetic Code) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert insights to decode codon assignments and degeneracy of the genetic code.
NEET Questions / Botany / Molecular Basis of Inheritance / Genetic Code
Imagine a scenario where a novel amino acid is discovered. If the existing genetic code must accommodate this new amino acid without altering the existing amino acid assignments, what is the MOST likely mechanism for achieving this?
Expansion of the codon length from three to four bases
Overlapping reading frames
Reassignment of a rarely used codon
Modification of the ribosome structure
A researcher discovers a bacterial strain with an unusual genetic code. In this strain, the codon UAG, typically a stop codon, codes for tryptophan. Which of the following would be the MOST direct consequence of this altered genetic code?
Premature termination of protein synthesis
No effect on protein synthesis
Substitution of tryptophan with another amino acid
Elongation of proteins past the normal termination point
Which of the following is NOT a characteristic of the genetic code?
Universal
Degenerate
Non-ambiguous
Overlapping
If a mRNA sequence reads 5'-AUGUUUGCUAG-3', how many amino acids will the resulting polypeptide have?
1
2
3
4
An RNA molecule contains 1200 bases and codes for a protein with 400 amino acids. If the base at position 601 is deleted, shortening the RNA to 1199 bases, how many codons will be altered?
1
200
201
400
