The trp operon is controlled by repression and attenuation, providing a two-stage response to progressively more stringent tryptophan starvation. But attenuation alone can provide robust regulation: other amino acid operons such as leu and his rely entirely on attenuation for their control. Correct number of codons in leader peptide of leu & his operon  in a row;

#Question id: 4194

#Unit 3. Fundamental Processes

After the action of peptidyl transferase, the peptidyl-tRNA is located at the

#Question id: 5269

#Unit 8. Inheritance Biology

The material responsible for transformation was shown to be DNA by

#Question id: 10143

#Unit 6. System Physiology – Plant

In the carbon assimilation reaction of photosynthesis, the biosynthesis of 1 molecules of glucose from the 6 molecules of carbon dioxide requires;

#Question id: 11759

#Unit 9. Diversity of Life Forms

Thread-like pseudopods that can perform phagocytosis are generally characteristic of which group?

#Question id: 2217

#Unit 2. Cellular Organization

In immunofluorescence studies you always see the small G-protein Ras in a specific region of the cell and, given its protein sequence along with many other proteins localized to this area, you hypothesize that their C-terminal Cys-Ala-Ala-X (X can be any amino acid) motifs may be responsible for targeting these proteins to this subcellular region. To test this hypothesis, you genetically engineer the sequence encoding this motif onto a cDNA encoding green fluorescent protein. When immunofluorescence is used, where specifically would you expect to see GFP localized in the cell?