You are a graduate student at the university of iowa and working as a teaching assistant for a freshman introductory biology course. two of your students have come to you with a ques- tion about the sequence of an mrna transcribed from a gene. the original dna sequence from which the mrna was transcribed reads: tgacgatcgta. the students were asked to provide the sequence of bases in the mrna and came up with the following mrna sequence: actgctagcat. they are confused because their answer does not match the answer in the book. briefly explain the very common mistake they made and what the correct sequence is.