1.    Compare between the structure of the ribosomes in prokaryotic and eukaryotic cells? (1 point):  

2. Explain how exo-enzymes produced by bacteria which digest different macro-molecules in the surrounding environment, won’t digest these molecules inside the bacterial cells? (1 point):  

3. In the peptidoglycan layer of bacterial cells: give a reason why the tetrapeptide side chain is only binding to the NAM molecule and not to the NAG?

4.   Two types of prokaryotic cells can be distinguished: bacteria and archaea. How do these cells differ from each other? Compare their cell wall structure, patterns of cytoplasmic membranes and ribosomal entities and 16S-rRNA? (1.5 points)

5.Compare between the structure of cell wall in prokaryotic and eukaryotic cells?