Ch. 3 Chemistry of Life Test Review

1. All matter is composed of: All matter is composed of:

2. A molecule with a slightly negative and slightly positive end is called: A molecule with a slightly negative and slightly positive end is called:

3. A substance made up of only one type of atom: A substance made up of only one type of atom:

4. Bonds that form between atoms of opposite charges are known as: Bonds that form between atoms of opposite charges are known as:

5. A solution with a pH above 7 is known as: A solution with a pH above 7 is known as:

6. Electrons found in the outermost shell are known as: Electrons found in the outermost shell are known as:

7. How many bonds can a carbon atom make? How many bonds can a carbon atom make?

8. What elements build proteins? What elements build proteins?

9. What are the building blocks of nucleic acids? What are the building blocks of nucleic acids?

10. Which of the following is an example of a carbohydrate: Which of the following is an example of a carbohydrate: DNA DNA Hemoglobin Hemoglobin Cellulose Cellulose Triglyceride Triglyceride

11. Name the molecule: Name the molecule:

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13. When water molecules stick to other water molecules it is called: When water molecules stick to other water molecules it is called:

14. If a student tested a food mixture that came out positive for the Biuret’s test and the brown paper bag test, what two components did the food mixture contain? If a student tested a food mixture that came out positive for the Biuret’s test and the brown paper bag test, what two components did the food mixture contain?

15. When two atoms share electrons, such as oxygen and hydrogen, what type of bond is this? When two atoms share electrons, such as oxygen and hydrogen, what type of bond is this?

16. The weak attraction between the H+ and the O- of two different water molecules is what type of bond? The weak attraction between the H+ and the O- of two different water molecules is what type of bond?

17. Fill in the blank: Fill in the blank: Carbon Carbon Hydrogen Hydrogen Nitrogen Nitrogen Oxygen Oxygen ______________________ ______________________ Sulfur Sulfur

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19. What can elements form to become more stable? What can elements form to become more stable?

20. What is a carbohydrate found in fruits and vegetables that is indigestible? What is a carbohydrate found in fruits and vegetables that is indigestible?

20. Carbohydrate used for glucose storage in animals Carbohydrate used for glucose storage in animals