When genes are expressed, the genetic information (base sequence) on DNA is first copied to a molecule ofmRNA(transcription). The mRNA molecules then leave the cell nucleus and enter the cytoplasm (in eukaryotes), where they participate in protein synthesis by specifying the particular amino acids that make up individual proteins (translation).
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What is the process of gene expression?
Gene Expression Gene expression is the process by which the information encoded in a gene is used to direct the assembly of a protein molecule. The cell reads the sequence of the gene in groups of three bases.
How do genes affect the expression of genetic information?
Expression of Genetic Information. Genes act by determining the structure of proteins, which are responsible for directing cell metabolism through their activity as enzymes.
How does the cell read the sequence of a gene?
The cell reads the sequence of the gene in groups of three bases. Each group of three bases (codon) corresponds to one of 20 different amino acids used to build the protein. Gene expression is the process the cell uses to produce the molecule it needs by reading the genetic code written in the DNA.
How does the expression system regulate gene expression?
A complex set of interactions between genes, RNA molecules, proteins (including transcription factors) and other components of the expression system determine when and where specific genes are activated and the amount of protein or RNA product produced. Regulating the rate of transcription. This is the most economical method of regulation.