Assignment 6 Biochem

1. What is a proteasome? Give the steps how ubiquitin tags a protein for degradation?

2. What is a lysosome? Describe its significance for a cell function?

3. Wat are the stages of transamination process for amino acid deamination with example of deamination of glutamate and its importance in amino acid metabolism?

4. Explain how living organisms excrete excess nitrogen from metabolism of amino acids and three ways nitrogen is converted to waste products by animals?

5. What is urea cycle and give the reactions of urea cycle with their respective substrates and enzymes involved in the cycle?