Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 14, Problem 2TY
Summary Introduction
Introduction: Process of gene regulation is very important in prokaryotic and eukaryotic organisms. Gene regulation serves the purpose of expression of genes through which formation of functional proteins takes place.
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In prokaryotes, control of gene expression usually occurs at the
a. splicing of pre-mRNA into mature mRNA.
b. initiation of translation.
c. initiation of transcription.
d. All of the choices are correct.
In which of the following does nitrogenous base pairing (base complementarity via hydrogen bonds) NOT play a key, direct role?
A. transcription of RNA from a DNA template
B. binding of the TATA binding protein to the TATA box
C. the RNAi pathway of gene regulation
D. Codon-Anticodon recognition in translation
Which of the following statements about gene regulation is false?
a. An operon contains DNA sequences that regulates its own expression.
b. The operator region can only be bound by an activator protein.
c. Transcription factors can affect the binding of RNA polymerase to the promoter.
d. A repressor is a transcription factor that hinders gene transcription.
Chapter 14 Solutions
Biology
Ch. 14.1 - Prob. 1CCCh. 14.2 - Which genes are under the control of the lac...Ch. 14.2 - With regard to regulatory proteins and small...Ch. 14.2 - What were the key observations made by Jacob,...Ch. 14.2 - CoreSKILL What was the eventual hypothesis...Ch. 14.2 - Prob. 3EQCh. 14.2 - Core Skill: Connections Look back at Fig 9.12....Ch. 14.2 - What are the advantages of having both an...Ch. 14.2 - Prob. 2CSCh. 14.3 - Prob. 1CC
Ch. 14.4 - What are the two opposing effects that histone...Ch. 14.4 - Prob. 1CSCh. 14.5 - Prob. 1CCCh. 14.5 - Prob. 2CCCh. 14 - Prob. 1TYCh. 14 - Prob. 2TYCh. 14 - Transcription factors that bind to DNA and...Ch. 14 - Prob. 4TYCh. 14 - For the lac operon, what would be the expected...Ch. 14 - Prob. 6TYCh. 14 - The trp operon is considered _____ blank operon...Ch. 14 - Prob. 8TYCh. 14 - Prob. 9TYCh. 14 - _____ blank refers to the process that allows a...Ch. 14 - Prob. 1CQCh. 14 - Transcriptional regulation often involves a...Ch. 14 - Prob. 3CQCh. 14 - Discuss the advantages and disadvantages of...Ch. 14 - Discuss the advantages and disadvantages of...
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- Prokaryotes regulate their processes primarily at the level of transcription. At what level (s) do eukaryotes regulate gene expression? O a. At the epigenetic level b. At the transcriptional level O c. At the translational level d. At the post-translational level All of the abovearrow_forwardWhich of the following gene regulation mechanisms are found ONLY in prokaryotes? a. coordinate regulation b. transcriptional regulation c. alternative splicing d. translational regulation e. DNA modificationsarrow_forwardWhich of the following BEST describes the characteristics and function of siRNA? A. a short strand of RNA that can complement and inactivate a sequence of mRNA B. a short strand of RNA that can act as a transcription factor to initiate transcription C. a strand of DNA that can bind to and inactivate an mRNA sequence D. a tRNA that is not able to attach to a ribosome and therefore inhibits the process of translationarrow_forward
- Which of the following is true about the genetic code? A. A codon is three to six bases long. B. Each amino acid is specified by only one codon. C. The codon signaling the end of transcription also codes for an amino acid. D. There are multple codons signaling the start of transcription. E. All organisms use essentially the same genetic code.arrow_forwardImagine that mutations occurred in one of the inverted repeat sequences within the rho-independent terminator sequence of a bacterium. What would likely be the consequence of this mutation? Select one: a. Transcription may not be initiated at all. b. Transcription may end prematurely. c. Transcription may be delayed. d. The rho protein won't be able to bind and transcription may not be terminate. e. Transcription may not be terminated and result in much longer RNA.arrow_forwardWhich of the following statament is NOT TRUE about gene expression?a. The expression of genes that code for proteins includes two stages: replication and translationb. Translation is the synthesis of a polypeptide using the information in the mRNA.c. During gene expression, the information encoded in genes is used to make specific polypeptide chains or RNA molecules.d. Gene expression is the process by which DNA directs the synthesis of proteinsarrow_forward
- Post-translational modifications of proteins can affect which of the following? a. protein function b. transcriptional regulation c. chromatin modification d. all of the abovearrow_forwardWhich of the following is the best description of a transcription factor? A. A protein that brings the correct nucleotides to RNA polymerase B. A protein that binds to specific DNA sequences C. A DNA sequence that binds to RNA polymerase D. A modification that is made to mRNA to help it be exported from the nucleus. .arrow_forwardWhich of the following is the definition of a gene? A. RNA that delivers amino acids to a ribosome during translation B. A unit of information encoded in the sequence of nucleotide bases in DNA C. The RNA component of ribosomes D. RNA that carries a protein-building messagearrow_forward
- Which of the following is true of transcription and translation in prokaryotes and eukaryotes? A. In prokaryotes, RNA is often used to make DNA O B. Only eukaryotes use tRNA during translation C. Only prokaryotes make mRNA during transcription D. In eukaryotes, transcription and translation occur in different parts of the cll Reset Selectionarrow_forwardWhich of the following is not involved in the elongation of prokaryotic peptide? a. EE-Tus, EE-Ts, EF-G factors b. mRNA c. peptidyl transferase d. formyl met tRNAarrow_forwardWhich of the following best explains how the prokaryotic expression of a metabolic protein can be regulated when the protein is already present at a high concentration? a.Repressor proteins can be activated and bind to regulatory sequences to block transcription. b.Regulatory proteins can be inactivated to increase gene expression. c.Transcription factors can bind to regulatory sequences to increase RNA polymerase binding. d.Histone modification can prevent transcription of the gene.arrow_forward
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