QUESTION 15 Which of the following is true regarding pre-mRNA modifications/processing? A The 5 cap is added after RNA pol Il finishes transcription of the primary transcript B. The 5 cap is added immediately after RNA pol II begins synthesis C. The poly A tail is necessary for recognition by the small ribosomal subunit D.A and C EB and C
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.
Genes follow central dogma, according to which DNA (deoxyribonucleic acid) is transcribed to mRNA (messenger ribonucleic acid) and RNA is translated to protein in ribosomes. Transcription occurs in the nucleus of a cell. DNA is first transcribed into pre-mRNA, which is processed and modified to become mature mRNA that can undergo translation.
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