Question

Extracellular glucose inhibits transcription of the lac operon by _____. Select one: a. strengthening the binding of repressor to the operator b. inhibiting RNA polymerase from opening the strands of DNA to initiate transcription c. activating adenylyl cyclase d. reducing the levels of intracellular cAMP e. weakening the binding of repressor to the operato

Answer 1

Answer:D. Reducing the levels of intracellular cAMP

Explanation:

Glucose inhibits transcription of the lac operon as a repressor of adenlylate cyclace synthesis while decreasing intracellular cyclic AMP concentration.

Answer 2

d. reducing the levels of intracellular cAMP

Step-by-step explanation:

Lac Operon can be defined as an unit of DNA that is made up of genes that is involved in the coding of proteins which are responsible for the transportation and metabolism of lactose in a cellular system before converting it to glucose.

When the levels of intracellular Cyclic Adenosine Monophosphate (cAMP) which helps to maintain sugar metabolism in the body are minimized extracellular glucose would inhibits transcription of the lac operon.