There are various types of DNA-targeting drug, including DNA alkylating agents, DNA intercalators and DNA chain terminators. Suggest why drugs targeting DNA can be useful for treating cancers and viral infections. S Describe TWO structural features that are necessary or useful for drugs to act as DNA intercalators. Describe TWO structural features that are necessary or useful for drugs to act as DNA chain terminators. 6 L V El MU

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Gene Interactions

When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.

Gene Expression

Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.