Final answer:
The arrangement of genes in operons allows for the coordinated regulation of gene expression in bacteria, providing efficiency and adaptability in metabolic processes.
Step-by-step explanation:
The arrangement of genes in operons is beneficial to certain bacteria because it allows for the coordinated regulation of gene expression. Operons are units of genetic expression consisting of related genes and controlling sequences. They include the operator and promoter sequences that regulate the transcription of the genes within the operon.
Operons provide a way for bacteria to efficiently control the expression of genes involved in specific metabolic pathways. For example, the lac operon in E. coli allows the bacteria to process lactose only when glucose is scarce and lactose is available. This ensures that the energy resources of the cell are used effectively.
Operons can also allow for the fine-tuning of gene expression. Some operons have mechanisms, such as transcription attenuation, that can slow down the rate of gene expression based on the needs of the cell. This helps the bacteria to adjust their metabolic processes to changing environmental conditions.