Chloroplasts are found exclusively in plants, and carry out photosynthesis
There is nothing there to answer
Phospholipids is the fundamental building block of a new cell membrane
Sponges are in the Porifera phylum
The stretch of the integral protein within the hydrophobic interior of the bilayer is also hydrophobic, made up of non-polar amino acids. Like the lipid bilayer, the exposed ends of the integral protein are hydrophilic. When a protein crosses the lipid bilayer it adopts an alpha-helical configuration.
