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.
Prepare your oven and pan. Once your steak is ready to cook, set it aside. Adjust your oven rack so that the top of the steak will be about 4 inches (10cm) from the broiler heating element. Then turn the oven on to broil and preheat at 350f.lace 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.