Please give me the answer to the A-level Biology Question What is the difference between DNA and mRNA?

Describe and explain how the lac Operon allows E coli bacteria t to respond to environmental conditions such as lactose availability: The lac Operon is an important regulatory mechanism that enables E coli bacteria to detect changes in their environment regarding lactose availability and adjust their metabolism accordingly. This process is achieved by regulating gene expression through transcriptional control. Describe and explain how the lac Operon allows E coli bacteria t to respond to environmental conditions such as lactose availability by elucidating how binding of lactose to the repressor protein releases its grip on the promoter region, allowing transcription of the three genes that encode proteins which allow E coli bacteria t to metabolize lactose for energy. When lactose is absent, the repressor protein binds to the promoter region and prevents transcription of the three genes, thus preventing the bacteria from metabolizing lactose for energy. Additionally, it is important to understand how Acetylcholine acts on a neuronal synapse, and how it affects gene expression. When Acetylcholine binds to its receptor on a neuron, it triggers a cascade of events that ultimately leads to changes in gene expression. This can result in changes in behavior or physiology depending on which genes are affected. Thus, describe and explain how the lac Operon allows E coli bacteria t to respond to environmental conditions such as lactose availability by enabling them to detect changes in their environment regarding lactose availability and adjust their metabolism accordingly. Describe and explain how this process works by elucidating how binding of lactose to the repressor protein releases its grip on the promoter region, allowing transcription of the three genes that encode proteins which allow E coli bacteria t to metabolize lactose for energy. Additionally, describe and explain how the lac Operon allows E coli bacteria t to respond to environmental conditions such as lactose availability by explaining how the lac operon works when lactose is both present and absent: when lactose is present, it binds to the repressor protein, releasing its grip on the promoter region and allowing transcription of the three genes that encode proteins that allow the bacteria to metabolize lactose for energy; when lactose is absent, the repressor protein binds to the promoter region and prevents transcription of the three genes, thus preventing the bacteria from metabolizing lactose for energy. To summarize, describe and explain how the lac Operon allows E coli bacteria t to respond to environmental conditions such as lactose availability by enabling them to detect changes in their environment regarding lactose availability and adjust their metabolism accordingly. Additionally, describe and explain how the lac operon works when lactose is both present and absent: when lactose is present, it binds to the repressor protein, releasing its grip on the promoter region and allowing transcription of the three genes that encode proteins that allow the bacteria to metabolize lactose for energy; when lactose is absent, the repressor protein binds to the promoter region and prevents transcription of the three genes, thus preventing the bacteria from metabolizing lactose for energy.

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