Thylakoid Definition. A thylakoid is a sheet-like membrane-bound structure that is the site of the light-dependent photosynthesis reactions in chloroplasts and cyanobacteria. It is the site that contains the chlorophyll used to absorb light and use it for biochemical reactions.
Turn the oven down to 200ÂºF and cook for about 1 hour per pound. Check your meat with a thermometer after 2.5 hours for a 2.5 pound roast. Follow these guidelines for doneness when checking temperature 1  : 130ÂºF Rare.
Broil your steak. Place your steak into the oven on the rack closest to the broiler. Cooking times will vary greatly based on the cut of steak, cooking altitude, type of oven you're using, and how hot the broiler runs; cooking times can range from 3 to 18 minutes.A good rule of thumb to go by is to watch it!roil your steak. Place your steak into the oven on the rack closest to the broiler. Cooking times will vary greatly based on the cut of steak, cooking altitude, type of oven you're using, and how hot the broiler runs; cooking times can range from 3 to 18 minutes. A good rule of thumb to go by is to watch it!