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As a neurobiologist, let's consider a scenario where we have 120 mM K+ inside the cell and 10 mM K+ extracellularly. Now, let's imagine that we increase the extracellular K+ concentration to 60 mM. What will happen to the membrane potential? a. It will depolarize b. It will hyperpolarize c. It will stay the same

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Texts: I actually have a majority of the information for the first few questions, but I can't figure out or just don't understand the chart and how you determine the expected amount of B-galactosidase. I just need someone to explain how the + and - as well as different things affect the operon. P 0 lacZ lacY lacA What type(s) of regulation does the lac operon have - negative inducible, negative repressible, or positive? Justify your answer. Include the conditions in which the genes that encode the lactose-metabolizing enzymes are transcribed or not transcribed. Two additional genes, lacI and Cap, are involved in the control of transcription of the lac operon. What general type of genes are lacI and Cap? Describe the specific function of each of these genes in controlling transcription of the lac operon. A variety of different mutations have been identified that affect the expression of the lac operon Z, Y, and A genes. These include lacI-, lacIS, Cap-, and lacO mutations. Examine the genotypes of the WT and Strains A-E in the table below and indicate the amount (None, Low, High) of B-galactosidase expected in the absence or presence of lactose or glucose. WT is filled out for you. Assume that genes not included in the genotype are wild type. Explain your reasoning for your answer to receive full credit. Finally, write down the specific resources (sections of eBook, specific figures, or animations) that you used to answer this question. Amount of B-galactosidase Expected (None, Low, or High) No Lactose, Lactose Present, Lactose Present, Glucose Present No Glucose, Glucose Present Strain # Strain Genotype WT Cap+ lacI+ lacP+ lacO+ None High Low A Cap+ lacI- lacP+ lacO+ B Cap+ lacIS lacP+ lacO+ C Cap- lacI+ lacP+ lacOc D Cap+ lacI+ lac- lacO+ E Cap+ lacI- lacP+ lacO+/F Cap+ lac+ lacP- lacO+
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Question Text
As a neurobiologist, let's consider a scenario where we have 120 mM K+ inside the cell and 10 mM K+ extracellularly. Now, let's imagine that we increase the extracellular K+ concentration to 60 mM. What will happen to the membrane potential? a. It will depolarize b. It will hyperpolarize c. It will stay the same
TopicAll topics
SubjectBiology
ClassClass 11