How can mutations in noncoding segments of DNA contribute to the development of cancers?

What common mutation occurs in many human cancers? Explain how it can have this effect.

(a) How does the duplication of individual genes occur? (b) individual that inherit a genetic condition known as xeroderma pigmentosum exhibit an extreme sensitivity to sunlight exposure and often develop skin cancer by the age of 10. What repair pathway is most likely disrupted as a result of such mutation? Explain why?

What are characteristics of DNA mutations and repair mechanisms.

Which type of mutation results in abnormal amino acid sequence?

Two major types of mutations are gene mutation and chromosome mutation. Which mutation is more lethal and why?

What is inheritable mutation?

What are the three possible effects on the cell (or organism)  when a mutation occurs in DNA? Which ones are most common? Which one is rare?

In cancer like disease, what kind of mutations are more focussed? Single Nucleotide Polymorphism or multiple mutations that occur in same gene?

Why is it essential for a cell to repair mutations in its DNA? What happens to the cell if the mutations are too severe?