MicroRNAs typically bind to the 3' untranslated region of mRNAs to guide their transport within cells. Maternal DNA contributes methylation patterns, and many human genes undergo alternative splicing. X inactivation is initiated by a long non-coding RNA acting in cis on the X chromosome.

1. Which of the following are true in humans? (select all that apply) microRNA typically bind to
promoters to enhance transcription maternal contributions are DNA methylation patterns very few
human genes undergo alternative splicing proteins can bind to the 3'UTR of an mRNA to guide
transport to a particular part of the cell X inactivation is initiated by a IncRNA acting in cis If 2
similar proteins contain some differences in amino acid sequence than they must have been
produced from 2 different genes