What do you do if people know if they are the control group or the experimental group?

Ideally we want to be the fly on the wall, observing without interfering... but if the subjects become aware of their role, it's imperative that the dialog about the nature of the experiment be conditioned in such a way as to maintain the integrity of the dependent and independent variables that self-awareness would destroy. Hence slightly change the narrative and focus, instead of telling a white lie by withholding information (which is normally the case), add a layer of irrelevant information so the attention shifts away from the experiment and element of awareness of their role is eliminited due to following a slightly deviated route of action.

Iwould say overuse ( but not 100% sure ) in the u.s. we tend to overuse water by leaving it running, throwing it away, taking long showers, etc.

Proteins are the workhorses of the cell, controlling virtually every reaction within as well as providing structure and serving as signals to other cells. proteins are long chains of  amino acids  , and the exact sequence of the amino acids determines the final structure and function of the protein. instructions for that sequence are encoded in  genes  . to make a particular protein, a messenger ribonucleic acid (mrna) copy is made from the gene (in the process called  transcription  ), and the mrna is transported to the  ribosome  . protein synthesis, also called  translation  , begins when the two ribosomal subunits link onto the mrna. this step, called initiation, is followed by elongation, in which successive amino acids are added to the growing chain, brought in by transfer rnas (trnas). in this step, the ribosome reads the  nucleotides  of mrna three by three, in units called  codons  , and matches each to three nucleotides on the trna, called the anticodon. finally, during termination, the ribosome unbinds from the mrna, and the  amino acid  chain goes on to be processed and folded to make the final, functional protein