6.Compare protein quantity to protein quality. Explain the various methods to determine protein quality.
7. Explain what the urea cycle is and how nitrogen is excreted via the cycle. The urea cycle consists of a series of five metabolic reactions that take place in the mitochondria and the cytosol. The first and second steps occur in the mitochondria. The first step involves the formation of carbamoyl phosphate from the reaction of ammonium ions and carbon dioxide. In the second step, citrulline is formed synthesized when Carbamoyl phosphate reacts with ornithine. In the third step, argininosuccinate synthetase catalyzes the formation of arginosuccinate
from citrulline. The arginosuccinate is then broken down in the presence of argininosuccinate lyase to form arginine and fumarate. In the last stage of the cycle, arginase catalyzes the hydroxylation of arginine to form urea. 8.Identify proteins that serve in each of the following capacities.
You've reached the end of your free preview.
Want to read all 8 pages?
- Spring '16
- Mr. Kemoni
- levels of protein structure