DATE:
DCHAPTER
ATE :
2
HANDOUT
DATE :
NAME:
NAME :
CLASS:
Carbohydrate Comparison Chart
NAME :
CLASS
: 2-4
BLM
ANSWERS
CLASS:
1. What elements are found in carbohydrates and in what ratio? C, H, O – CnH2nOn
2. If a sugar contains 10 oxygen atoms, how many hydrogen atoms will it contain? H – 20
3. For each molecule below, determine if it is a monosaccharide, disaccharide, or polysaccharide. Then
determine a source for that particular carbohydrate.
Carbohydrates
Type
Source(s)
a. glucose
M
Body/blood
b. maltose
D
Digestive system—small intestine
c. starch
P
Plants
d. cellulose
P
Plants
e. fructose
M
Fruit
f. galactose
M
Milk
g. sucrose
D
Table sugar, sugar cane, beets
h. lactose
D
Milk
i. glycogen
P
Animals
j. ribose
M
RNA
4. Describe a biological function for each of the following carbohydrates.
a. cellulose
Fibre/roughage
b. ribose
Component of RNA—used in protein synthesis
c. glucose
Used in cellular respiration as the primary energy
source
d. starch
From plants—broken down for energy
e. glycogen
From animals—broken down for energy, humans store
excess carbohydrates in this form
f. deoxyribose
Component of DNA
5. Draw the dehydration reaction starting with two glucose molecules.
6. Draw the hydrolysis reaction starting with maltose and water.
Figure 2.13 from the student book page 34.
BC Biology 12 Blackline Master
BLM 2-4 Answers: Carbohydrate Comparison Chart
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