Choose the correct answer from the list. no answer is used twice. not all of the answers will be used. the electron carrier, nadh, is derived from the vitamin. in aerobic organisms, the ultimate acceptor of electrons is in aerobic metabolism, the carbon atoms in fuels ultimately become the small organic compounds, are required in the diet of higher organisms and are components of coenzymes. : this compound serves as an acyl carrier in metabolism. a. oxygen b. coenzyme a c. minerals d. niacin e. nadph f. co2 g. riboflavin h. atp i. vitamins

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange