BIOLOGY 207 Lecture Notes - Lecture 26: Ribosomal Rna, Lac Repressor, Chromosome
Document Summary
The result, called the stringent response , is fewer ribosomes and lesser transcription of genes required for rapid growth. In the environment, microbes have to transition from nutrient rich to nutrient poor conditions, and then back again and this can happen very rapidly. When the cell is going rapidly it is geared for peak performance with a high number of ribosomes in the cell translating as fast as possible to keep up with rapid division events of the cells. When there is poor carbon and energy sources the cell starts to fill with idling. Under these conditions bacteria undergo a process called the stringent ribosomes , there"s nothing to make anymore. response , where there is a decrease in the number of ribosomal rna(rrna) transcripts. Prevents ribosomal assembly, also alters the expression of numerous other. The idling ribosomes , produce a small signaling molecule called want, ppgpp.
