Biology: The Unity and Diversity of Life (MindTap Course List)
Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Chapter 9, Problem 9SQ
Summary Introduction

Introduction: Transcription is the process in which the nucleotide sequences of a gene are transcribed into mRNA sequences, which code for proteins. During the process, RNA polymerase enzyme catalyzes the synthesis of phosphodiester bonds between RNA nucleotides, and thus mRNA chain extends by one nucleotide at a time.

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Once translated into proteins: (a) How many nucleotides are there? (b) How many codons are there? (c) How many amino acids?
A single template strand of a DNA molecule is represented by  3’atgtaccatgcgcaaatttaaaggccc5’. a) Imagine that AAG is an INTRON in the original DNA template strand above.  Write the mature mRNA strand after the three modifications?   b) Write the amino acid sequence of your mature mRNA. c) List the molecules involved in translation and briefly describe their function.
In Eukaryotes, DNA is a long molecule inside a tiny nucleus. a. How can this long chain fit in such space? b. How does it affect gene expression?
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