Question

5. Two of the four major classes of organic compounds are proteins and nucleic acids. What is the relationship between proteins and nucleic acids? (SC.912.L.18.1)
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1 point
Nucleic acids contain the information to make proteins.
Nucleic acids use proteins for energy.
Nucleic acids are a subset of proteins.
Proteins are long polymers of nucleic acids.
6. Phospholipids are linear molecules with one polar end and one nonpolar end. How does this structure relate to their function in cell membranes? (SC.912.L.18.1)
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1 point
The polar tails of phospholipids form the outside of the cell membrane.
The nonpolar heads of phospholipids form the outside of the cell membrane.
The polar heads of phospholipids combine to form the middle of the cell membrane, with the tails on the outside.
The nonpolar tails of phospholipids combine to form the middle of the cell membrane, with the heads on the outside.
7. Water is often called the "universal solvent" because many substances can be dissolved in water. What property of water allows it to be such a versatile solvent? (SC.912.L.18.12)
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1 point
Purity
Polarity
High heat capacity
Expansion upon freezing
8. The diagram below shows the general structure of an amino acid. Which type of molecule is formed from amino acids? (SC.912.L.18.1)
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1 point
Captionless Image
Lipids
Proteins
Carbohydrates
Nucleic acids
9. What will most likely happen if an appropriate enzyme is added to a chemical reaction? (SC.912.L.18.1 and 18.11)
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1 point
The reaction rate will increase.
The equilibrium of the reaction will be maintained.
The reaction rate will decrease.
The reaction will stop.
10. 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? (SC.912.L.18.1 and 18.11)
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1 point
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 statement

Answer 1

5. Nucleic acids contain the information to make proteins.

6. The nonpolar tails of phospholipids combine to form the middle of the cell membrane, with the heads on the outside.

7. Polarity

8. Proteins

9. The reaction rate will increase.

10. Enzymes function best at a specific temperature.