Macromolecules

The diagram shows the general structure of an amino acid. Which type of molecule is formed from amino acids?

• lipids
• proteins
• carbohydrates
• nucleic acids

You are analyzing a compound in the laboratory. You find that it is made up of carbon, hydrogen, and oxygen in a ratio of two hydrogen atoms for each carbon atom. How will you classify the compound?

• lipid
• protein
• carbohydrate
• nucleic acid

Fats, oils and cholesterol are all types of what?

• cell membranes
• hormones
  hormones
• lipids
• fatty acids

RNA and DNA are which type of macromolecules?

• carbohydrate
• lipid
• nucleic acid
• protein

Many plants have waxy coatings on some surfaces. This coating reduces water loss because it is not water-permeable. This waxy coating is which of the following types of organic molecule?

• protein
• carbohydrate
• nucleic acid
•  lipid

A sugar, a phosphate group, and a nitrogen base form the building blocks of which organic compound?

• carbohydrates
• lipids
• nucleic acids
• proteins

The human body maintains a temperature of around 98.6 degrees at all times. Enzymes are involved in almost every chemical reaction in the body. Which of the following describes the connection between these two statements? 

• Enzymes function best at a specific temperature.
• The body needs to be warm to prevent hypothermia.
  
• The body is kept relatively warm to prevent too much enzyme action. 
• There is no connection between the two statements. 

Like complex carbohydrates, proteins are macromolecules that serve many functions and can be chemically broken down and restructured. Both proteins and complex carbohydrates are which of the following?

•  polymers of smaller subunits
• sequence of sugars
• lipids of large molecules
• nucleotides of DNA

 In living organisms, lipids function mainly as:

• Sources of stored energy and transmitters of genetic information
• Sources of stored energy and components of cellular membranes
• Transmitters of genetic information and catalysts of chemical reactions
• Catalysts of chemical reactions and components of cellular membranes

What is the function of macromolecule subunit below?

• energy
• catalyst
• stores genetic information
• composes the majority of the cell membrane