Prepare for NEET Biology Molecular Basis of Inheritance (Mutations) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert guidance to analyze point mutations, frameshifts, and their effects.
NEET Questions / Botany / Molecular Basis of Inheritance / Mutations
A frameshift mutation occurs in a gene encoding a crucial enzyme. Which of the following is the LEAST likely consequence?
A silent mutation resulting in no change to the enzyme's function.
A truncated, non-functional protein due to a premature stop codon.
An altered amino acid sequence leading to a change in enzyme activity.
A protein with a completely different amino acid sequence and function.
Certain mutations are referred to as 'suppressor mutations.' Which statement best describes their function?
They increase the rate of other mutations within the same gene.
They always revert the original mutation back to the wild-type sequence.
They reverse the phenotypic effect of another mutation at a different site within the same gene or a different gene.
They enhance the phenotypic expression of the original mutation.
Which of the following DNA repair mechanisms is MOST likely to be involved in correcting a thymine dimer caused by UV radiation?
Base Excision Repair
Mismatch Repair
Nucleotide Excision Repair
Homologous Recombination
A mutation changes a codon from UAU (Tyrosine) to UAC (Tyrosine). This is an example of which type of mutation?
Missense mutation
Nonsense mutation
Frameshift mutation
Silent mutation
Transposons, also known as 'jumping genes,' can cause mutations by:
Always causing frameshift mutations.
Only occurring in germ cells.
Inserting themselves into a gene, disrupting its function.
Exclusively causing point mutations.
Which type of mutation is MOST likely to result in a protein with a completely new function?
Silent mutation
Missense mutation in a non-coding region
Frameshift mutation in a coding region
Nonsense mutation at the very end of a coding region
A point mutation that changes a codon specifying an amino acid into a stop codon is called a:
Missense mutation
Silent mutation
Nonsense mutation
Frameshift mutation
Which of the following mutations is MOST likely to have a drastic effect on the protein product?
A silent mutation in the middle of the gene
A missense mutation near the end of the gene
A frameshift mutation near the start codon
A nonsense mutation near the end of the gene
Sickle cell anemia is caused by a mutation that substitutes valine for glutamic acid. This is an example of:
Nonsense mutation
Frameshift mutation
Silent mutation
Missense mutation
Which type of mutation involves the addition or deletion of one or two nucleotides, leading to a shift in the reading frame?
Silent mutation
Missense mutation
Nonsense mutation
Frameshift mutation
