Question

what three major macromolecules are involved in gene expression?

Answer 1

DNA, RNA, and proteins are essential for all known forms of life. They are the major macro molecules involved in the processes of gene expression. DNA are the genetic material in most of the organisms (There are some RNA viruses too). Genetic information is stored in DNA sequences. Gene expression is the process by which the genetic code (the nucleotide sequence of a gene) is used to synthesize mRNA and then to direct protein synthesis. It is called the central dogma of molecular biology. mRNA strands are formed based on the DNA templates through a process called transcription. mRNA codons are specific for amino acids and they are used in a process called translation to make poly peptide chains. Thus, sequences in the gene direct protein synthesis in cells.