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    a mutation in the operator region of the trp operon can prevent the trp repressor from binding to this operator. when these mutant cells are placed in a solution containing chicken broth, which of the following events would happen?

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    A mutation in the operator region of the trp operon can prevent the trp repressor from binding to this operator. When these mutant cells are placed in a solution containing chicken broth, which of the following happens?

    a. Tryptophan would bind to the repressor.

    b. The Repressor would bind to the operator irrespective of the presence of amino acids in the environment.

    c. The transcription of the trip operon would be inhibited.

    d. The transcription of the repressor protein is inhibited

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    You are growing E. coli in a laboratory in order to study their operons. The growth media you are using contains lactose, no glucose and no tryptophan.  Using your knowledge of operons and their regulation   a.Which operons would be functional under these conditions? b.What repressors would be made? (NOTE: name the repressors using their gene names) c.Which repressor(s) would be made in the inactive form? d.Which repressor(s) would be made in the active form? e.Which repressor(s) under these conditions can bind the operator sequence? f.Which repressor(s)under these conditions cannot bind the operator sequence?

    In the trp operon, if a mutation occurred in the gene for the repressor so that it could bind to the operator even in the absence of tryptophan____________. a) the inducer cannot bind trpO, so operon gene transcription occurs b) the active repressor cannot bind trpO, so operon gene transcription is attenuated c)the active repressor binds tpO, so operon gene transcription is always repressed d) the repressor binds the corepressor, and operon gene transcription occurs.

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    Mutations may have an effect on the expression of the lac operon and the trp operon. Would the following mutations have a cis- or transeffect on the expression of the protein-encoding genes in the operon? A. A mutation in the operator site that prevents lac repressor from binding to it B. A mutation in the lacI gene that prevents lac repressor from binding to DNA C. A mutation in the trpL gene that prevents attenuation

    If CAP is bound to the Promoter of the Lac Operon and the repressor protein is not bound to the operator, which of the following is true: a.Glucose Levels are low & Lactose is absent b.Glucose is absent & Lactose is present c.cAMP is low & Lactose is Absent d.Glucose and Lactose are Present e.cAMP is low & Lactose is present

    How does the lac operon regulate lactose digestion in bacteria?a. The repressor protein becomes a lactose-digesting enzyme onlywhen lactose is present.b. The repressor protein binds to the lac operon when lactose ispresent, blocking transcription.c. When lactose is present, it binds to the operator region of the lacoperon, activating transcription of the repressor protein gene.d. The repressor protein falls off the lac operon when lactose ispresent, and lactose-digesting genes are expressed.

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    A mutation in the operator region of the trp operon can prevent the trp repressor from binding to

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    A mutation in the operator region of the trp operon can prevent the trp repressor from binding to this operator. When these mutant cells are placed in a solution containing chicken broth, which of the following events would happen?

    a. The transcription of the repressor protein is inhibited.

    b. The transcription of the trp operon would be inhibited.

    c. The repressor would bind to the operator irrespective of the presence of amino acids in the environment.

    d. Tryptophan would bind to the repressor.

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    BIO Chapter 11 Flashcards

    Study with Quizlet and memorize flashcards terms like Which of the following does NOT accurately describe the lac operon?, A mutation in the operator region of the trp operon can prevent the trp repressor from binding to this operator. When these mutant cells are placed in a solution containing chicken broth, which of the following happens?, Anhidrotic ectodermal dysplasia is an X-linked disorder that results in the absence of sweat glands. How would this condition be manifested in a heterozygous female? and more.

    BIO Chapter 11

    Which of the following does NOT accurately describe the lac operon?

    Click card to see definition 👆

    eukaryotic

    Click again to see term 👆

    A mutation in the operator region of the trp operon can prevent the trp repressor from binding to this operator. When these mutant cells are placed in a solution containing chicken broth, which of the following happens?

    Click card to see definition 👆

    Tryptophan would bind to the repressor.

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    1/16 Created by lowekey

    Terms in this set (16)

    Which of the following does NOT accurately describe the lac operon?

    eukaryotic

    A mutation in the operator region of the trp operon can prevent the trp repressor from binding to this operator. When these mutant cells are placed in a solution containing chicken broth, which of the following happens?

    Tryptophan would bind to the repressor.

    Anhidrotic ectodermal dysplasia is an X-linked disorder that results in the absence of sweat glands. How would this condition be manifested in a heterozygous female?

    She would have a random pattern of tissue with and without sweat glands.

    When are DNA molecules the least tightly coiled?

    S phase of interphase

    Alternative RNA splicing has revealed inaccuracies in the one gene:one polypeptide hypothesis. Why?

    Transcription of the same gene can lead to the production of different mRNAs and therefore different proteins.

    MicroRNA (miRNA) controls _____.

    translation

    After translation is complete, the insulin polypeptide is activated by _____.

    the cutting of the initial translation product to yield two shorter chains joined together by sulfur linkages

    A similar protein is found in both a bacterial cell and a single-celled eukaryote. However, the prokaryote seems to produce a much higher amount of the protein. A detailed investigation of the control mechanisms of this protein in both organisms would include which of the following?

    the mechanisms of transcriptional control

    A researcher performs a DNA microarray but forgets to add the enzyme reverse transcriptase. This is important because the enzyme makes _____ from a(n) _____ template.

    cDNA; mRNA

    In eukaryotic cells, signal transduction pathways involve _____.

    a series of relay molecules, of which the last activates a transcription factor

    Researchers have used yeast mating systems as model systems to study _____.

    signal transduction systems

    Since the first animal was produced using a fully differentiated cell, a number of observations have been made. Which of the following statements is true in regard to reproductive cloning?

    Cloned animals often develop chronic conditions that are usually only associated with old age.

    Stem cells could be immensely important in the treatment of which of the following conditions?

    spinal cord injuries

    Proto-oncogenes have the potential to become oncogenes. Which of the following is most likely to lead to cancer?

    a mutation that causes the proto-oncogene to become overactive

    Colonoscopy is the examination of the large colon. It allows for visual diagnosis of ulcers and polyps, which may lead to colon cancer. A polyp _____.

    is a cluster of abnormal cells

    A mutation in the ras gene can __________.

    stimulate cell division

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