Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 16, Problem 5TYK
Summary Introduction

Introduction:

Gene expression is the process involving the synthesis of protein from the nucleotide sequence of a gene. It includes transcription and translation. Gene expression is controlled in different stages in eukaryotes. These stages are transcriptional regulation, posttranscriptional regulation, translational regulation, and posttranslational regulation.

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a. Use circles for activators and squares for repressors. Draw the shapes bound to each promoter region. b. Under the word gene write “ON” or “OFF” to indicate if the gene is transcribed or not under the different conditions.
Arrange the statements in their proper order by writing the corresponding letter (e.g. A) for each statement in the space provided below. A. The single-stranded RNA would complement the target RNA. B. Gene expression is inactivated once the mRNA is no longer accessible for translation. C. The risk-induced silencing complex which is composed of RNA and protein subunits is formed. D. Double-stranded, non-coding RNA is cleaved by Dicer. E. The mRNA can be cleaved or remain bound by the RISC. 1. 2. 3. 4. 5.
Briefly describe the significance of regulatory factors in transcription process. Why the promoter is called an essential regulatory element.
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