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Chapter 2 Review!. Good luck . 1. What is an atom? a. single-celled organism b. smallest basic unit of matter c. smallest basic unit of life d. positively charged particle. 2. An ion forms when an atom gains or loses a. protons. b. neutrons. c. bonds. d. electrons. .

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Chapter 2 review

Chapter 2 Review!

Good luck 


Chapter 2 review

1. What is an atom?

a. single-celled organism

b. smallest basic unit of matter

c. smallest basic unit of life

d. positively charged particle


Chapter 2 review

2. An ion forms when an atom gains or loses

a. protons.

b. neutrons.

c. bonds.

d. electrons.


Chapter 2 review

3. In covalent bonds, atoms share

a. pairs of electrons.

b. ionic compounds.

c. carbon and oxygen.

d. hydrogen ions.


Chapter 2 review

4. Hydrogen bonds form between atoms that are

a. nonpolar.

b. negatively charged.

c. oppositely charged.

d. neutral.


Chapter 2 review

5. The attraction among molecules of different substances is called

a. cohesion.

b. adhesion.

c. specific heat.

d. surface tension.


Chapter 2 review

6. A solution with a high Hydrogen ion concentration

a. has a pH of 7.

b. is very basic.

c. has a high pH.

d. is very acidic.


Chapter 2 review

7. Glucose molecules are the monomers of which macromolecule?

a. Lipids

b. Nucleic Acids

c. Proteins

d. Carbohydrates


Chapter 2 review

8. Fats and oils are types of macromolecule?

a. cell membranes.

b. hormones.

c. lipids.

d. proteins.


Chapter 2 review

9. Proteins are composed of which molecules? macromolecule?

a. amino acids

b. fatty acids

c. sugars

d. nucleic acids


Chapter 2 review

10. DNA and RNA are two types of macromolecule?

a. proteins.

b. nucleic acids.

c. lipids.

d. carbohydrates.


Chapter 2 review


Chapter 2 review

Identify the reactants in the following chemical reaction: substances by

6H2O + 6CO2 C6H12O6 + 6O2

a. 6H2O + 6CO2

b. C6H12O6 + 6O2

c. 6H2O

d. 6O2


Chapter 2 review

13. The double arrows tell you that the following reaction substances by

a. takes place very rapidly.

b. is very unstable.

c. occurs in both directions.

d. has high bond energies.


Chapter 2 review

14. What is the term for the amount of energy that needs to be added for a chemical reaction to start?

a. chemical energy

b. activation energy

c. bond energy

d. reactant energy



Chapter 2 review


Chapter 2 review

17. The smallest basic unit of matter is the reaction?

a. molecule.

b. atom.

c. compound.

d. cell.


Chapter 2 review

18. Which of the following solutions has the highest H ion concentration?

a. a solution with a pH of 1

b. a solution with a pH of 4

c. a solution with a pH of 7

d. a solution with a pH of 10


Chapter 2 review

19. Which substance represented concentration?(A or B) is the solvent?

a. both A and B

b. substance A

c. substance B

d. neither A nor B


Chapter 2 review

20. In the lock-and-key model of enzyme function, what is happening in step 3?

a. A product is released.

b. Bonds are being broken.

c. New bonds are forming

d. The substrates are beginning to bind to the enzyme.


Chapter 2 review