Unit 2 - Macromolecules

Which characteristic BEST explains why carbon is relevant to living things?

• carbon is the most common element on earth
• there are many different kinds of carbon available to use
• carbon is radioactive and gives off energy
• carbon is the backbone of all the different organic compounds

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Which organic molecule is paired with its function?

• nucleic acid: to store energy
• proteins: to provide insulin
• lipids: to regulate metabolic processes
• carbohydrate: to provide quick-release energy

The diagram shows the structural formula for starch. Which of the following explains why start is a polymer? 

• it is made up of many simpler units
• it is made up of one big unit
• it doesn't have carbon in it
• it has lots of carbon in it

What is the structure?

• oil
• dilute alcohol
• water
• ionic solution

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Which molecule serves as a catalyst? 

• lipid
• protein
• nucleic acid
• carbohydrate

Which of these elements is likely to be found in an organic compound?

• helium
• hydrogen
• mercury 
• tin

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Why are proteins important to the survival of animals?

• Proteins provide the body with energy. 
• Proteins provide energy storage for cells. 
• Proteins provide genetic information to cells. 
• Proteins provide structural functions in the body. 

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What differentiates one protein from another?

• size of amino acid
• color of amino acid
• sequence of amino acids
• chemical structure of amino acids

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Which is a general characteristic of lipids?

• Lipids contain nitrogen. 
• Lipids are soluble in water. 
• Lipids are insoluble in water. 
• Lipids contain chains of amino acids. 

Which best identifies a function of carbohydrates? 

• building a cell
• source of energy
• development of hormones 
• production of antibodies

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