The diagram shows the general structure of an amino acid. Which type of molecule is formed from amino acids?
lipids
proteins
carbohydrates
nucleic acids
2. Multiple Choice
1 minute
1 pt
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
3. Multiple Choice
1 minute
1 pt
Fats, oils and cholesterol are all types of what?
cell membranes
hormones hormones
lipids
fatty acids
4. Multiple Choice
1 minute
2 pts
RNA and DNA are which type of macromolecules?
carbohydrate
lipid
nucleic acid
protein
5. Multiple Choice
1 minute
1 pt
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
6. Multiple Choice
1 minute
1 pt
A sugar, a phosphate group, and a nitrogen base form the building blocks of which organic compound?
carbohydrates
lipids
nucleic acids
proteins
7. Multiple Choice
30 seconds
1 pt
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.
8. Multiple Choice
30 seconds
1 pt
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
9. Multiple Choice
30 seconds
1 pt
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
10. Multiple Choice
30 seconds
1 pt
What is the function of macromolecule subunit below?