Final answer:
Thylakoid membranes contain abundant phospholipids and proteins, along with some porins and a low percentage of galactose-containing glycolipids.
Step-by-step explanation:
Thylakoid membranes have a relatively plentiful amount of phospholipids. They also contain protein content and some amounts of porins. However, they have a low percentage of galactose-containing glycolipids.