Microbiology With Dis... -Access Modified
4th Edition
ISBN: 9780321962492
Author: BAUMAN
Publisher: PEARSON
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Chapter 7, Problem 20MC
Summary Introduction
Introduction:
Genes that operate and transcribe a set of genes are called as operons. An operon is a DNA segment which contains adjacent genes, where structural gene, operator, and regulatory gene are included. It is the basic elemental unit of the genetic expression and regulation.
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Students have asked these similar questions
What is an operon ?
a. A series of genes controlled by the same operator
b. A series of genes on the same mRNA molecule
c. A series of genes that all have the same function
d. A series of genes all regulated by the same repressor
Which of the following is true of operons?a. They consist of a coordinated set of genes, all of which are regulated as a single unit.b. They may be inducible or repressible.c. Only bacteria and archaea utilize operons.d. All of the above are true.
What do you call the site of activators that bind to the DNA molecule ?
A. enhancer
B. operon
C. operator
D. II
E. I
Chapter 7 Solutions
Microbiology With Dis... -Access Modified
Ch. 7 - DNA replication requires a large amount of energy,...Ch. 7 - Vibrio vulnificus Infection Greg enjoyed Floridas...Ch. 7 - Prob. 2TMWCh. 7 - Prob. 3TMWCh. 7 - Why is the genetic ancestry of microbes much more...Ch. 7 - Prob. 1CCSCh. 7 - Which of the following is most likely the number...Ch. 7 - Which of the following is a true statement...Ch. 7 - A plasmid is ___________. a. a molecule of RNA...Ch. 7 - Prob. 4MC
Ch. 7 - Prob. 5MCCh. 7 - Which of the following molecules functions as a...Ch. 7 - Prob. 7MCCh. 7 - Prob. 8MCCh. 7 - The Ames test ___________. a. uses auxotrophs and...Ch. 7 - Which of the following methods of DNA repair...Ch. 7 - Prob. 11MCCh. 7 - Prob. 12MCCh. 7 - Which of the following statements is true? a....Ch. 7 - Prob. 14MCCh. 7 - Although two cells are totally unrelated, one cell...Ch. 7 - Prob. 16MCCh. 7 - Prob. 17MCCh. 7 - Prob. 18MCCh. 7 - Prob. 19MCCh. 7 - Prob. 20MCCh. 7 - Prob. 21MCCh. 7 - Prob. 22MCCh. 7 - Prob. 23MCCh. 7 - Before mutations can affect a population...Ch. 7 - Prob. 25MCCh. 7 - Fill in the Blanks 1. The three steps in RNA...Ch. 7 - Fill in the Blanks 2. A triplet of mRNA...Ch. 7 - Fill in the Blanks 3. Three effects of point...Ch. 7 - Fill in the Blanks 4. Insertions and deletions in...Ch. 7 - Fill in the Blanks 5. An operon consists of...Ch. 7 - Prob. 6FIBCh. 7 - Prob. 7FIBCh. 7 - Fill in the Blanks 8. A gene for antibiotic...Ch. 7 - Fill in the Blanks 9. ______ are nucleotide...Ch. 7 - Fill in the Blanks 10. ____________ is a...Ch. 7 - Fill in the Blanks 11.________ RNA carries amino...Ch. 7 - Fill in the Blanks 12. ______ RNA and ______ RNA...Ch. 7 - How does the genotype of a bacterium determine its...Ch. 7 - List several ways in which eukaryotic messenger...Ch. 7 - Compare and contrast intrans and exons.Ch. 7 - Polypeptide synthesis requires large amounts of...Ch. 7 - Describe the operon model of gene regulation.Ch. 7 - Prob. 6SACh. 7 - Prob. 7SACh. 7 - Describe the formation and function of mRNA, rRNA,...Ch. 7 - Prob. 9SACh. 7 - Explain the central dogma of genetics.Ch. 7 - Compare and contrast the processes of...Ch. 7 - Fill in the following table:Ch. 7 - On the figure below, label DNA polymerase I, DNA...Ch. 7 - Prob. 2VICh. 7 - The drugs ddC and AZT are used to treat AIDS....Ch. 7 - Prob. 1CTCh. 7 - A scientist uses a molecule of DNA composed of...Ch. 7 - Explain why an insertion of three nucleotides is...Ch. 7 - How could scientists use siRNA to turn off a...Ch. 7 - Prob. 5CTCh. 7 - Prob. 6CTCh. 7 - Prob. 7CTCh. 7 - Prob. 8CTCh. 7 - Corynebacterium diphtheriae, the causative agent...Ch. 7 - Prob. 10CTCh. 7 - The endosymbiotic theory states that mitochondria...Ch. 7 - Hydrogen bonds between complementary nucleotides...Ch. 7 - On average, RNA polymerase makes one error for...Ch. 7 - We have seen that wobble makes the genetic code...Ch. 7 - If a scientist synthesizes a DNA molecule with the...Ch. 7 - What DNA nucleotide triplet codes for codon UGU?...Ch. 7 - Suppose you want to insert into your dog a gene...Ch. 7 - Using the following terms, fill in the following...
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- A mutation that inactivates the repressor gene of the lac operon results in (a) the continuous transcription of the structural genes (b) no transcription of the structural genes (c) the binding of the repressor to the operator (d) no production of RNA polymerase (e) no difference in the rate of transcriptionarrow_forwardWhich of the following is characteristic of genes and gene regulation in both bacteria and eukaryotes? (a) promoters (b) non-coding DNA within coding sequences (c) enhancers (d) operons (e) DNA located in a nucleusarrow_forwardWhich of the following molecules is a protein produced by a regulatory gene? a) operon b) inducer c) promoter d) repressorarrow_forward
- Which of the following is true about operons? A. Contains a cluster of genes transcribed as multiple mRNAs. B. Contains a cluster of genes transcribed as a single mRNA. C. They are commonly found in eukaryotes. D. Can only be regulated by gene activator proteins.arrow_forwardWhich 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.arrow_forwardd. give an example of an operon that is under negative control e. repressor f. give an example of a repressor molecule g. activator h. give an example of an activatorarrow_forward
- Which of the statements about the attenuator region of the trp operon is TRUE? Choose an answer below: It is located upstream of the promoter. It is located upstream of the operator. Its transcript contains inverted repeats. It is located upstream of the structural genes. c and d, but not a or barrow_forwardWhat would occur if the repressor of an inducible operon weremutated so it could not bind the operator?(A) irreversible binding of the repressor to the promoter(B) reduced transcription of the operon’s genes(C) buildup of a substrate for the pathway controlled by theoperon(D) continuous transcription of the operon’s genesarrow_forwardIn a bacterial operon, the active repressor bind to the A. promoter. B. terminator. C. operator. D. regulator.arrow_forward
- The regulator protein that acts on a negative repressible operon is synthesized as a. an active activator. c. an active repressor. b. an inactive activator. d. an inactive repressor.arrow_forwardHow do repressors reduce transcription of an operon? A) recruit RNA polymerase to promoters B) block the ability of RNA polymerase to bind a promoter C) break phosphodiester bonds in the DNA D) inhibit the activity of the ribosomearrow_forwardWhich of the following is true of reverse transcriptase?a. It is required for the movement of DNA transposons.b. It catalyzes the synthesis of DNA from RNA.c. It is required for the transposition of retrotransposons.d. b and c are correct.arrow_forward
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