Cell membranes are constructed mainly from cell membranes are constructed mainly from nucleic acid and protein lipid and protein carbohydrate and protein lipid and carbohydrate

The cell membrane is the wall of the cell which separates the cell inners to the outer environment. Cell membranes are constructed mainly from lipids and protein. The largest percentage of molecules which make up the cell membrane are phospholipids, cholesterol, and protein. 

U. life is what you go through to become a better person. it makes you stronger, wiser, and more creative. it can be hard but its ok. because i believe everyone was put here for a reason. whether or not you know that reason you should always look towards the future and trust in god for a better tomorrow.be safe and blessed

Homologous chromosomes with heterozygous alleles d) heterozygous chromosomes with homozygous alleles