There are two major types of carbohydrates (or carbs) in foods: simple and complex. Simple carbohydrates: These are also called simple sugars. They're found in refined sugars, like the white sugar you see in a sugar bowl. If you have a lollipop, you're eating simple carbs. But you'll also find simple sugars in more nutritious foods, such as fruit and milk.
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.
The thylakoids are arranged in stacks called grana (singular, granum). These various structures within the chloroplast organize the complex series of chemical reactions that make up the overall process of photosynthesis. Some of the steps take place in the thylakoid membranes, while others take place in the stroma.