Download Food Molecules Answers

Food Molecules
Name: ______________________
Part 1: Identification of Molecules
For each of the following organic structures, determine whether the material fits in the category of
carbohydrate, fat or protein. In addition, identify what kind of molecule it is within the category. For
instance, in the fat category, is it a saturated, monounsaturated, polyunsaturated, cis or trans fat.
1) carbohydrate, polysaccharide
2) protein, amino acid
3) carb, monosaccharide
4) carb, monosaccharide
5) saturated fat
6) protein, polypeptide
7) carbohydrate, disaccharide
8) trans monounsaturated fat
9) trans, polyunsaturated fat
10)
cis monounsaturated fat
Part 2: Fill in the following table.
Substance
Functional
group(s)
carbohydrate
-OH
Calories/gram
Common examples
4 Cal/g
Sugar, syrup, starches
Monomer/Polymer
Name
Monosaccharide/
polysaccharide
fat
-COOH
9 Cal/g
Oils, butter, meats
NA
protein
-COOH and
-NH2
4 Cal/g
Meats, eggs, cheese
Amino acid/
protein
Part 3: Compare/Contrast
For the following grouping of words, describe how the terms are similar and how they are different.
10) saturated fat, monounsaturated fat, polyunsaturated fat
•
•
All are fats
Saturated fats have no double bonds, monounsaturated fats have one double bond and
polyunsaturated fats have multiple double bonds.
11) protein, polysaccharide
•
•
Both are polymers
Proteins are polymerized amino acids, while polysaccharides are polymerized
monosaccharides
12) trans fat, cis fat
•
•
Both are unsaturated fats
Trans fats have the hydrogens on either side of the double bond on opposite sides, while cis
fats have the hydrogens on either side of the double bond on the same side.
13) ADP, ATP
•
•
Both are biomolecules inside of cells that are used to store energy for the cell.
ADP has two phosphates attached to the adenosine, while ATP has three phosphates attached
to the adenosine in high energy bonds.