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
Related Questions
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
Sickle cell anaemia results from a single base substitution in a gene , thus it is example of
Point mutation
Frame shift mutation
Silent mutation
Aneuploidy
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
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 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
Sickle cell anaemia results from a single base substitution in a gene , thus it is example of
Point mutation
Frame shift mutation
Silent mutation
Aneuploidy
Silent mutations:
Always cause a change in the amino acid sequence
Do not change the amino acid sequence
Always result in a non-functional protein
Are always beneficial
How does polymorphism arise?
Mutations
Recombination
Diploidy
Haploidy
Which of the following best describes a mutation?
A slow change in the RNA sequence of an organism
A sudden change in the DNA sequence of an organism
A change in the protein structure of an organism
A change in the phenotype of an organism caused by environmental factors
A point mutation involves:
A change in a whole chromosome
A change in a single nucleotide
The deletion of a whole gene
The duplication of a whole gene
