You have been studying a family of enzymes. you know that the original protein contains the amino acid sequence gly, trp, asp, ser, lys, arg. you start with several different samples, and you discover that each one has a different mutation in the amino acid sequence. you decide to assay each of them in the hope that at least one will have at least some activity. which of the following five sequences would you expect to give you the best result? a. gly, tyr, asp, ser, lys, arg b. asp, trp, asp, ser, lys, arg c. gly, trp, asp, ser, asp, arg d. gly, trp, asp, thr, lys, arg e. gly, met, asp, thr, lys, arg

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.