Carbohydrates
Name:
Directions: Use you notes, book or websites to answer the following:
Websites that may help:
http://www.visionlearning.com/library/module_viewer.php?mid=61
http://library.thinkquest.org/04apr/00217/en/biology/carbs/index.html
http://pslc.ws/macrog/kidsmac/starlose.htm
1. Which elements do carbohydrates contain, and in what ratio?
2. If a sugar compound has 11 oxygen atoms, how many hydrogen atoms does it contain?
3. Based on their molecular formulas, which of the following are NOT carbohydrates?
a. C3H803
c. C18H32O16
e. C16H32O2
b. C10H18O9
d. C4H8O2
f.
C6H12O6
4. For each molecule below, determine if it is a monosaccharide, a disaccharide, or a polysaccharide:
a. Fructose
d. Glucose
g. Chitin
b. Ribose
e. Sucrose
h. Starch
c. Cellulose
f.
i.
Glycogen
5. Describe a biological function for each of the following carbohydrates
a. Cellulose
b. Ribose
c. Starch
d. Glycogen
e. Deoxyribose
Maltose
f.
Fructose
g. Sucrose
6. Complete these word equations
a. Glucose + glucose 
b. Glucose + fructose 
c. Monosaccharide + monosaccharide 
d. Lactose + water 
e. Disaccharide + water 
Videos for dehydration synthesis and hydrolysis
http://www.youtube.com/watch?v=b7TdWLNhMtM&feature=related
http://www.youtube.com/watch?v=UyDnnD3fMaU
7. Briefly describe the process of the condensation reaction for carbohydrates.
8. Briefly describe the process of the hydrolysis reaction for carbohydrates.
9. How many water molecules would be produced in the synthesis of a polysaccharide consisting of 5
glucose monomers?
10. Lastly, plants like grasses are almost completely cellulose with very little starch or monosaccharides.
That being said WE (animals) cannot get any energy gains from eating cellulose as we lack the
necessary enzyme which allows us to hydrolyze the bonds in cellulose turning it into glucose. BUT,
don’t cows eat grass????? Well yes they do, but they do not exactly digest (hydrolyze) the cellulose
by themselves. Watch this video from University of Wyoming to learn how they can digest cellulose.
http://www.youtube.com/watch?v=SM6IvygITCE