vitamins

compare and contrast coenzyme vs cofactor vs apoenzyme

Only for 103139, 103897

103897 okay if expalin math Only for above listed OTA-ONLY. All others called in. Please EXPLAIN the math. 100 mL of a 0.1 M NaOH solution is being titrated with 0.2 M HCl solution. a) What is the pH of the solution after 25 mL of the HCl solution has been added? b) What is the solution after an additional 20 mL of HCl solution has been added? c) What is the pH of the solution after an additional 25 mL of HCl has been added? d) How much HCl solution is required to reach the equivalence point in the titration of the above solution?

Conversions

1.) is 47.8 ng/L = 0.0478ppb? and if so would that above concentration be above 10,000 ug/L (what would this be in ppb) 2.) is 6.77 ng/m^3 = 0.0066 ppb? an if so, would that exceed 0.5-5g/Kg for a 70 kg person (which is a lethal concentration) (and what would this be in ppb) and would that exceed Lethal concentration (50 percent kill): 2,485 mg/m3/4 hour... this is for a rat 3.) and finally what is 78.4 ng/g in ppb and is it more then Lethal dose (50 percent kill): 4 gm/kg (and what would this be in ppb)

Macromolecules

Which statement is inncorrect about macromolecules? a. Polypeptides are composed of amino acids linked by amide bonds. b. RNA is composed of ribonucleotides linked by phospho ester bonds. c. Carbohydrates polymers are composed of monosaccharides linked by ester bonds. d. RNA is composed of four diffrent monomers. Which is not a property of ribosomes? a. They are an assembely of polypeptides, RNA and DNA. b. They are found in both prokaryotic and eukaryotic cells. c. They function as agents in the RNA directed synthesis of polypeptides. d. They are found in the cytoplasm and as part of the endoplasmic reticulum in eukaryotic cells.

Triglyceride / iodine

Why is iodine particularly useful for establishing the degree of unsaturation in a trigylceride?