Biochemistry Review

Proteins are made of smaller units called:

• Glucose 
• Cellulose 
• Fatty acids
• Amino acids

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Organic compounds are always based on what element?

• oxygen

• nitrogen

• carbon

• Phosphorus

The four organic compounds found in living things are?

• Carbohydrates, Lipids, Nucleic Acids, and Oxygen

• Carbohydrates, Lipids, Proteins, and Carbon

• Carbohydrates, Lipids, Proteins, Nucleic Acids

• Carbon, Lipids, Proteins, Nucleic Acids

Enzymes are examples of this organic compound...

• Carbohydrate
• Lipid
• Protein
• Nucleic Acid

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This is an example of 

• Lipid 
• Carbohydrate 
• Protein
• Nucleic Acid

The effect of temperature on the relative rate of action of an enzyme is represented in the graph below.

The optimum temperature for the action of this enzyme is approximately

• 15⁰C

• 22⁰C

• 40⁰C

• 50⁰C

Some bacteria produce cellulase, a substance that speeds up the breakdown of cellulose in plant cell walls. Cellulase is an example of which of the following?

• A carbohydrate

• An enzyme

• A hormone

• An organelle

Collagen is found in connective tissue throughout the human body. Collagen is made of three amino acid chains that are twisted around one another. Which of the following best explains why collagen is classified as a protein?

• It is found in a tissue.

• It is made up of amino acids.

• It is made up of twisted chains.

• It is found throughout the human body

Cellulose is a compound found in plants. It is made of a long chain of molecules with ringed structures. The molecules contain mostly carbon, hydrogen, and oxygen atoms. Which category of biological molecules does cellulose belong?

• Carbohydrate

• Lipid

• Nucleic acid

• Protein

Fructose is a simple sugar that can be a source of energy for the body. What type of organic molecule is fructose?

• Nucleic acid

• Carbohydrate

• Lipid

• Protein