Term
| Why is carbon present in so many kinds of molecules? |
|
Definition
| It can form four covalent bonds. |
|
|
Term
| What best describes the role carbon plays in the structure of compounds present in living things? |
|
Definition
|
|
Term
Which statement is true about water molecules?
- The oxygen atom has a negative charge.
- The hydrogen atoms do not share electrons.
- Water molecules move randomly around each other.
- Water molecules cannot dissolve many substances. |
|
Definition
| The oxygen atom has a negative charge. |
|
|
Term
| How does water relate to the ability of a living thing to generate energy? |
|
Definition
| Without the proper balance of water, chemical reactions in cells could not take place. |
|
|
Term
| What is the most important role of hydrogen bonding between water molecules? |
|
Definition
| It enables water molecules to bond to each other. |
|
|
Term
| What repeating units make up a protein? |
|
Definition
|
|
Term
Which of the following best shows how primary structure relates to protein function?
- High temperatures cause proteins to denature.
- Changing one amino acid in the protein hemoglobin causes sickle-cell anemia.
- Proteins are sensitive to changes in pH.
- The shape and chemistry of an enzyme's active site determine its function. |
|
Definition
| Changing one amino acid in the protein hemoglobin causes sickle-cell anemia. |
|
|
Term
| How do enzymes speed up a chemical reaction? |
|
Definition
| Enzymes lower the activation energy of a chemical reaction. |
|
|
Term
|
Definition
| It transmits genetic information to the next generation. |
|
|
Term
True or False?
DNA translates the information in RNA to make proteins. |
|
Definition
|
|
Term
| What best explains how the structure of ATP helps provide energy to the cell? |
|
Definition
| ATP contains energy in the chemical bonds between its phosphate groups. |
|
|
