Thymine dimers (DNA bulges) are repaired by: Reverse transcriptase DNA base excision repair system Translocase The ribosome Question 20 1 pts Nonsense mutations occur when introduced into the coding-sequence of a gene. What effect does this have on the protein? Transposons can do these, EXCEPT: Interrupt coding sequence in a gene cause mutations increase protein trafficking Alter transeription of downstream genes
Nonsense mutations in the coding sequence of a gene introduce a premature stop codon, resulting in the production of a truncated protein or no protein at all. This can have various effects on the functionality of the protein, depending on its function. It may render the protein non-functional, disrupt its structure, or affect its stability.
Thymine dimers (DNA bulges) are repaired by: Nucleotide excision repair system. This repair system removes the damaged DNA strand containing the thymine dimers and replaces it with a new, undamaged strand. The process involves several steps including recognition and excision of the damaged strand, synthesis of a new strand, and ligation to join the new and existing strands.
Nonsense mutations occur when introduced into the coding-sequence of a gene. This type of mutation introduces a premature stop codon into the gene's coding sequence. As a result, the translation of the mRNA molecule into a protein is terminated prematurely, leading to the production of a truncated or incomplete protein. This can have various effects on the protein's function, depending on its role and the specific amino acids affected by the mutation. In some cases, the truncated protein may lose its function entirely, while in others, it may retain partial functionality or exhibit completely different functions.
Transposons are mobile genetic elements that can move within a genome and cause mutations. They have the ability to insert themselves into coding sequences of genes, interrupting the normal protein-coding sequence. This interruption can lead to the disruption of gene function or the production of nonfunctional proteins. However, transposons do not generally alter protein trafficking or affect the transcription of downstream genes.