Topic+4a

Topic 4a Jeff M Any of a group of organic compounds that includes sugars, starches, celluloses, and gums and serves as a major energy source in the diet of animals. These compounds are produced by photosynthetic plants and contain only carbon, hydrogen, and oxygen, usually in the ratio 1:2:1.http://www.answers.com/topic/carbohydrate Carbohydrates are our main source of energy. They are made up of two different sugars which are called simple sugars and complex sugars.they are any class of organic compounds that form the supporting tissues of plants and are a very important energy source for animals and humans.

Alisha R Carbohydrates are the main [|energy] source for the human body. Chemically, carbohydrates are [|organic molecules] in which carbon, hydrogen, and oxygen bond together in the ratio. [] simple an complex.Starch is the principal polysaccharide used by plants to store glucose for later use as [|energy]. Plants often store starch in seeds or other specialized organs. []

Day 3 1.Emily R.

The following pictures were taken during the sugars lab. They are of four different solutions containing unknown sugars or possibly nothing at all.

--Benedicts solution test--Iodine Test



--Benedicts solution after acid--

If sucrose is present it will be by itself. Use the reference table and the pictures to identify the contents of the four unknowns.

Tyler B. (just water) || sucrose ||
 * ** Sugar ** || ** Positive Results ** || || ** Unknown Solutions ** || ** Contents ** ||
 * ** glucose ** || Benedicts solution turns from blue to orange after heating || || ** Solution A ** || starch ||
 * ** Starch ** || Iodine turns from golden brown to black || || ** Solution B ** || starch ||
 * ** Sucrose ** || Benedicts solution turns from blue to orange **//only after reacting with acid//** || || ** Solution C ** || dilute soulution
 * There are no other interactions between sugars and indicators. || || ** Solution D ** || glucose