Name: ____________________________________ Date: ___________ Class: ________
Unit 4 Biomolecules Review
Be able to compare the structures and functions of different types of biomolecules, including
carbohydrates, lipids, proteins, and nucleic acids;

Be able to identify the elements that make up the following biomolecules:
Write a yes or no in the box to indicate if the element is present or not.
Carbon
Carbohydrates
Hydrogen
Nitrogen
Oxygen
Yes
Proteins
Yes
Lipids
No
Nucleic Acids

Yes
Biomolecules are large complex molecules made up of smaller molecules (we called them
monomers or building blocks). What are the monomers (molecules) that make up the
following biomolecules:
Biomolecule

Phosphorus
Monomer
Carbohydrates
______________________________
Protein
______________________________
Lipids
______________________________
Nucleic Acids
______________________________
Some biomolecules (proteins and polysaccharides) are formed by a process known as
dehydration synthesis. (Remember break the word down: dehydration = loosing water;
synthesis = creation. Therefore water is lost in the chemical reactions that creates these
molecules) use the Venn diagram below to compare and contrast proteins and
Polysaccharides.

Nucleic acids are made of monomers called nucleotides. Identify the parts of a nucleotide
like the one shown below. Write your answer in the arrow provided.

In our identifying nutrients lab, we looked at several tests to identify nutrients in the
foods we eat. Identify what biomolecule each test listed below tests for.
Benedict test
______________________________
Lugol (iodine) test
______________________________
Biuret test
______________________________
Sudan Red test
______________________________
Identify the results for the following foods by using a + or – in the appropriate box
Substance
Benedict
test
Lugol (iodine)
test
Biuret
test
Apple juice
Brown beans
Steak
Identify the chemical structures shown in the diagrams below.
Sudan Red
test
What are the characteristics and functions of enzymes?

What is the function of an enzyme in a cell?

Be able to identify what is happening in a catabolic reaction.

What is happening in an anabolic reaction?

Be able to identify the roles of enzymes in the digestive process.

Catalase is an enzyme that is found in the tissues of plants and animals (even us).

o
Catalase (enzymes) are a modification of what type of biomolecule:
o
The above biomolecule is made up of repeating sub units (monomers/molecules) known as: