Model Building Questions 4 Allolactose can be produced from either glucose or lactose. True False Lactose is a (positive/negative) regulator of allolactose. True False Allolactose is a (positive/negative) regulator of the lac repressor. True False When no external stimuli are present or changing, the lac operon (an inducible system) is typically always ON. True False Model Building Questions 5 Lactose is processed by the lac operon in both prokaryotes and eukaryotes. True False From the INFORMATION that you read on the last page, which component do you predict will bind to the promoter region of the operon? From the components you added to YOUR MODEL, which one do you predict will bind to the operator region of the operon?
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Allolactose can be produced from either glucose or lactose: This statement is **False**. Allolactose is produced from lactose, not glucose. Show more…
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Madhur L.
PART 1 - MCQ TRUE/FALSE. TRUE=T, FALSE=F Answer in TEMPLATE 1 1. Concerning gene regulation by bacteria: A. The lac operon is considered a repressible operon. B. In the trp operon, attenuation causes RNA polymerase to stop prematurely. C. Translation of the leader peptide allows completion of the mRNA transcript. D. The lac operon is only switched on in the absence of glucose in the growth medium. E. The enzyme β-galactosidase is only produced in large quantities when the lac repressor is bound to the operator. 2. Regarding eukaryotic gene regulation: A. Lariats are discarded byproducts of RNA splicing. B. Alternative splicing can produce multiple mRNAs from one gene. C. Post-translational modification can alter the activity of a protein after it is produced. D. Cells can silence genes with mRNAs by binding to siRNAs and blocking their translation. E. Chromatin structure plays an important role in controlling gene expression and replication.
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