Describe the major steps in water purification as carried out by a modern municipal treatment plant.

What will be an ideal response?


Biology & Microbiology

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Tacrolimus (FK-506) is a drug that inhibits an enzyme called calcineurin. Calcineurin is a protein phosphatase. This is an enzyme that dephosphorylates (removes phosphate groups) from proteins. When added to cells, tacrolimus can inhibit the dephosphorylation of a protein called NFAT, but it cannot prevent the dephosphorylation of a protein called CDK1 . What is the most likely explanation for

this finding? A. Calcineurin requires an additional cofactor to dephosphorylate NFAT B. NFAT is a substrate of calcineurin, but CDK1 is not C. Tacrolimus is a competitive inhibitor of calcineurin for NFAT and CDK11 D. Tacrolimus changes the optimum pH for calcineurin

Biology & Microbiology

What characteristic of vertebrates is missing in all invertebrates?

What will be an ideal response?

Biology & Microbiology

In ciliates, the ____ is used for ____

a. gullet; digestion b. cilia; flexible support c. pellicle; digestion d. contractile vacuole; food gathering e. pellicle; water balance

Biology & Microbiology

If each nucleotide coded for a single amino acid, how many different types of amino acids could be

combined to form proteins? a. 4 b. 16 c. 20 d. 64 e. 0

Biology & Microbiology