the human tpm1 gene encodes members of the tropomyosin family of cytoskeletal proteins. which of the following best explains how different proteins can be made in different cell types from the one tpm1 gene? responses the gtp cap is selectively added to and activates different exons. the gtp, cap is selectively added to and activates different exons. different introns are selectively converted to exons. different introns are selectively converted to exons. different exons are retained or spliced out of the primary transcript. different exons are retained or spliced out of the primary transcript. different portions of the primary transcript remain bound to the template dna
