The trp operon in e. coli regulates genes that code for enzymes required for synthesis of the amino acid tryptophan. the trp operon is repressible operon. when tryptophan is not available in the enviroment, the trp repressor protein is (active/inactive/regulated). therefore, rna polymerase can bind to the (operator/promoter/structural genes)

The correct answer will be 1. trp repressor protein is- inactive

                                          2. RNA polymerase can bind to the- promoter

Explanation:

A trp operon is a group of genes which encode for the production of the enzymes of amino acid tryptophan. It is a repressor protein and attenuation (coupled transcription and translation) regulated process which depends on the concentration of tryptophan in the environment that is when tryptophan is present in low concentration, trp operon is active while it is inactive in the presence of tryptophan.

In presence of tryptophan, the repressor binds to the operator of DNA sequence and thus blocks the path of RNA polymerase and terminate the transcription while in absence of tryptophan, repressor molecule remains inactive and RNA polymerase after binding to promoter sequence can promote the transcription of genes.

Thus, inactive and promoter is the correct answer.

[ answer ]

foliated

[ explanation ]

foliation forms in a rock when pressure squeezes the rock together. the rock then has a design of many different color little lines. there are three types of foliated rock. the types are slate, schist, and gneiss. each type of foliated rock is different based on grain size and foliation characteristics. the lines appear when the rock has been under pressure.

< > arsenal < >

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.