Exams › NEET › Biology

A mutation at one base of the first codon, of a gene, produces a non-functional protein. Such a mutation is called

1. nonsense mutation
2. missense mutation
3. frameshift mutation
4. reverse mutation

Correct answer: nonsense mutation

Solution

A nonsense mutation changes a codon into a stop codon, causing premature termination of translation. This often produces a shortened, non-functional protein, especially if it occurs near the beginning of the gene.

Related NEET Biology questions

• Which of the following is a transcription factor produced by a regulatory gene?
• Which of the following combination is false?
• Which scientist experimentally proved that DNA is the sole genetic material in bacteriophage?
• If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is 6.6 × 10⁹ bp, then the length of the DNA is approximately
• Which of the following RNAs should be most abundant in animal cell?
• The final proof for DNA as the genetic material came from the experiments of:

⚔️ Practice NEET Biology free + battle 1v1 →