Using the lab opening as an example explain how genes are activated in the presence of lactose. what occurs when genes are activated why is the lac oberon activated make sure to use the following words in your answer proteins operator tepressor

Operon is the set of genes that are present together and occurs in prokaryotes like bacteria. Control of operons is significant.

Explanation:

Production of RNA and protein requires energy. Cells can't stand to squander energy making genes in the event that they needn't bother with them. Therefore, operons, for example, the lac operon must turn on when the metabolism of lactose is required and turn off when it isn't required.

The lac operon is for the metabolism of the lactose. Typically, the lac operon remains off. A repressor protein ties the operator or control region upstream of the operon anticipating translation. At the point when lactose is available outside the cell, it crosses the cell layer and goes about as an inducer of the operon.

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answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.