Answer:
Nitrogen is present in the atmosphere in a molecule form about 78 percent. This nitrogen comes to the earth with the water through rainfall. Some nitrogen fix by beneficial microorganisms such as Cyanobacteria and Azotobactor which are present in the roots of higher plants. These microorganisms convert nitrogen molecule into nitrates and used by the plants. There are some other microorganisms which again convert nitrate into nitrogen molecules, called denitrifying bacteria and nitrogen molecule goes to the atmosphere again and complete the cycle.
Answer:
It decreases the levels of cAMP in the cell, repressing transcription from the lac operon.
Explanation:
When glucose is absent, cAMP serves as coactivator binds to CRP, the catabolite gene activator protein. The CRP-cAMP complex binds to the site near the lac promoter and stimulates the expression of the operon by RNA polymerase many folds.
Catabolite repression refers to inhibition of the synthesis of enzymes of lactose catabolism when glucose is present as an energy source. In the presence of glucose, synthesis of cAMP is inhibited resulting in its lower cellular concentration. The lower cAMP levels do not allow the binding of cAMP and CRP. The result is reduced expressed of lac operon.
Answer:
Water is the solvent because there is more of it.
Explanation:
Solvent is the one that there is more of, and water is known as the 'universal solvent'.
The bony landmark that <span>can be felt and seen, and is commonly used to help determine where to give an intramuscular injection on the lateral surface of the thigh is called <u>the greater trochanter.
</u><u />The illiac crest is found on the pelvis, the lateral epicondyle is in the arm, and the remaining options are too small to be felt and seen. So the correct answer has to be the greater trochanter found on the femur, or the thigh bone.<u>
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