Rough ER, which is associated with ribosomes, functions in the synthesis and processing of secreted and membrane proteins

Smooth ER, which lacks ribosomes, functions in lipid synthesis.

TLS Online TPP Program

#Id: 6391

#Unit 2. Cellular Organization

CAP–cAMP binds upstream to promoters DNA and target bends the DNA considerably about 100 degrees

TLS Online TPP Program

#Id: 6392

#Unit 2. Cellular Organization

Stimulation of b-galactosidase synthesis by cAMP with wild-type and mutant CAP.

TLS Online TPP Program

#Id: 6393

#Unit 2. Cellular Organization

The E. coli trp operon contains the 5 genes Trp-EDCBA for the anabolic enzymes to make the tryptophan.

TLS Online TPP Program

#Id: 6394

#Unit 2. Cellular Organization

Major enzyme is Tryptophan Synthase

TLS Online TPP Program

#Id: 6395

#Unit 2. Cellular Organization

Major enzyme is Tryptophan Synthase whose activity is reduced when trp concentration is high

TLS Online TPP Program

#Id: 6396

#Unit 2. Cellular Organization

Trp operon is negatively regulated by two ways

 Repression

Attenuation