BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 10, Problem 13SA
Summary Introduction
Introduction:
There is no process of development in prokaryotes, so they do not have any master genes. Prokaryotes adjust their gene expression when they respond to environmental changes. For example, in a bacterium, availability or unavailability of the food in the surrounding regulates the level of transcription.
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In prokaryotes, structural proteins in a single biochemical pathway are usually found as a(n) ________ within the genome.
a.
cluster
b.
polycistronic transcript
c.
operon
If glucose is absent, but so is lactose, the lac operon will be ________. a. activated b. repressed c. activated, but only partially d. mutated
Prokaryotes are lacking
in their DNA sequence.
A. introns
В. еxons.
C. promoter sites
D. operons
Chapter 10 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 10 - Gene expression does not vary by ________. a. cell...Ch. 10 - Binding of _______ to _______ in DNA can increase...Ch. 10 - Prob. 3SACh. 10 - Mechanisms that govern gene expression do not...Ch. 10 - Muscle cells differ from bone cells because they...Ch. 10 - Prob. 6SACh. 10 - Prob. 7SACh. 10 - Prob. 8SACh. 10 - Which of the following includes all of the others?...Ch. 10 - Prob. 10SA
Ch. 10 - Prob. 11SACh. 10 - Prob. 12SACh. 10 - Prob. 13SACh. 10 - True or false? Gene expression patterns can be...Ch. 10 - Match the terms with the most suitable...Ch. 10 - Why are some genes expressed and some not?Ch. 10 - Do the same mechanism of governing gene expression...Ch. 10 - Prob. 3CTCh. 10 - The photos below show flowers from two Arabidopsis...
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- 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_forwardProteins that influence RNA synthesis by binding directly to DNA are called_____ . a. promoters c. operators b. transcription factors d. enhancersarrow_forwardAs 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 regulationarrow_forward
- Which 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_forwardGenes of related function frequently cluster into: please explain the answer a.transcripts b.oligomers c.operons d. operatorsarrow_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_forward
- 8) Which of these describes the function of RNA polymerase? A. Amplifies the “message" by making multiple copies of an mRNA molecule after it has been transcribed from DNA B. Converts a protein sequence to mRNAarrow_forwardThe 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 bindingarrow_forwardRetroviruses 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_forward
- Prokaryotic gene regulation occurs at the level of ________. a. translation b. transcription c. both transcription and translationarrow_forwardThe experimental growth of an eye on the leg of a fruit fly is most famous for providing direct evidence that________ Select one: a. proteins are involved making eyes b. genes are involved in making eyes c. one operon can control many genes d. genes are regulated via negative feedback e. that one transcriptional factor can regulate many genesarrow_forwardTightly coiled DNA is ________. a. known as hypermethylated b. translationally regulated c. transcriptionally inactivearrow_forward
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