Which of the following structures is most likely to be found i an autotrophic protist

The trp operon in e.coli regulates genes that code for enzymes required for synthesis of the repressible operon. when tryptophan is not available amino acid tryptophan. the trp operon is a in the environment, the trp repressor protein activeinactiveregulated. therefore, rna polymerase can bind to the genes to begin transcription.

What is the most appropriate method of gaining weight (muscle mass)

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks