what kind of side chain (non-polar, polar, or charged) is most common for amino acids in the helical, membrane spanning parts of the protein

Explain how the political influence of african americans leaders became weaker.

Which is a genetic engineering advancement directly related to a career in biotechnology? 1) improving solar energy collection 2) transporting textiles at higher rates 3)creating crop foods that resist insect pests 4)repairing historical sites with quality materials

About __ of the mass of the cell is water