Biology: The Unity and Diversity of Life (Looseleaf)
15th Edition
ISBN: 9781337408417
Author: STARR
Publisher: CENGAGE L
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Chapter 10, Problem 13SQ
Summary Introduction
Concept introduction: Operons are the set of genes containing a promoter and one or more operator that helps to control the transcription process. A type of operon called lac operon which can occur in the bacteria is used to
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As trytophan levels increase in the cell, _____ bind(s) to active aporepressors, causing ______ of tryptophan operon.
a.
inducers, negative regulation
b.
repressors, co-repressing
c.
tryptophan, negative regulation
d.
tryptophan, positive regulation
e.
B-lactose, negative regulation
The sigma subunit of bacterial RNA polymerase _____.
a. binds to a bacterial gene’s promoter
b. is composed of both polypeptide and RNA molecules
c. is required for termination of transcription
d. is required for RNA polymerization
e. is required for ribosomal binding
Match the terms with the most suitable description. ___ operon a. makes a man out of you ___ Circadian rhythm b. binding site for repressor ___ Barr body c. can be epigenetic ___ differentiation d. inactivated X chromosome ___ mRNA zip code e. controls multiple genes ___ DNA methylation f. localization mechanism ___ eyeless g. speeds transcription ___ activator h. required for eye formation ___ SRY gene i. effect of regulatory loops ___ operator j. cells become specialized
Chapter 10 Solutions
Biology: The Unity and Diversity of Life (Looseleaf)
Ch. 10 - Effect of Paternal Grandmother's Food Supply on...Ch. 10 - Effect of Paternal Grandmother's Food Supply on...Ch. 10 - Effect of Paternal Grandmother's Food Supply on...Ch. 10 - Gene expression does not vary by ___ . a. cell...Ch. 10 - Binding or ___ to ___ in DNA can increase the rate...Ch. 10 - Muscle cells differ from bone cells because they...Ch. 10 - Prob. 4SQCh. 10 - Mechanisms that govern gene expression do not...Ch. 10 - Prob. 6SQCh. 10 - Prob. 7SQ
Ch. 10 - Prob. 8SQCh. 10 - Which of the following includes all of the others?...Ch. 10 - Prob. 10SQCh. 10 - Prob. 11SQCh. 10 - A cell with a Barr body is ___ . a. a bacterium b....Ch. 10 - Prob. 13SQCh. 10 - Which of the following statements is incorrect? a....Ch. 10 - Prob. 15SQCh. 10 - Explain why somebut not allof an organism's genes...Ch. 10 - Do the same mechanisms that govern gene expression...Ch. 10 - Prob. 3CTCh. 10 - The photos below show flowers from two Arabidopsis...
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- Retroviruses such as HIV, Herpesviruses, and Hepatitis B can be effectively inhibited by _____. Mark all that apply: A. inhibition of cell wall synthesis B. inhibition of ergosterol C. disruption of the ETS in infected cells D. nucleoside analogs such as acyclovirarrow_forwardGenetics: Operonarrow_forward6. _____ is a DNA sequence. 1.Coactivator 2.Corepressor 3.Enhancer 4. Inducer 5.Transactivatorarrow_forward
- In prokaryotes, the trp operon is under ________ that ________ prevents RNA polymerase from binding. a. negative regulation; biochemically b. negative regulation; physically c. positive regulation; biochemicallyarrow_forwardIn order for the lac operon to be triggered, lactose must be present and ________. a. cAMP levels low b. glucose stores depleted c. glucose levels higharrow_forwardb. c. spores d. all of the above e. none of the above 4. Concerning the lac operon, activation of the protein called CAP by CAMP will enable the complex CAP-CAMP to bind to the a. promoter b. terminator c. activator-binding site d. operator e. coding sequence 5. Bacteria are excellent model organisms for genetic studies, and mutations often result in observable phenotypic changes because a. of their rapid growth b. they are haploid organisms c. they can be studied in relatively inexpensive experiments d. they have a diploid genome e. their phenotypic changes can also be affected by environmental factorsarrow_forward
- If glucose is absent, but so is lactose, the lac operon will be ________. a. activated b. repressed c. activated, but only partially d. mutatedarrow_forwardIn prokaryotes, structural proteins in a single biochemical pathway are usually found as a(n) ________ within the genome. a. cluster b. polycistronic transcript c. operonarrow_forwardProteins that influence RNA synthesis by binding directly to DNA are called_____ . a. promoters c. operators b. transcription factors d. enhancersarrow_forward
- . The tryptophan operon is usually in the _______position and is inhibited by a/an_______ molecule. on, repressor off, inducer on, inducer off, repressorarrow_forwardWhich of these BEST DESCRIBE tryptophan in the Trp Operon? A. Acts as a corepressor B. Acts as a coactivator C. Acts as an inducer D. Acts as an enhancerarrow_forwardIf tryptophan is presence in the culture media of E.coli then _________. the promoter will be accessed by the RNA polymerase the repressor will bind to the operator the structural genes of the trp operon will be expressed tryptophan will be synthesizedarrow_forward
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