Download Biochemistry Quiz Review

Biochemistry Quiz Review
Multiple Choice
Identify the choice that best completes the statement or answers the question.
1. Which type of chemical bond is the strongest?
A. Intermolecular
B. Hydrogen
D. Ionic
C. Covalent
2. A water molecule is polar because its hydrogen and oxygen atoms
C. become ions.
A. do not share the electrons equally.
B. both lose electrons.
D. both gain electrons.
3. Which of the following is FALSE?
A. Water is polar because the hydrogens are slightly positive and the oxygen is slightly
negative.
B. Polarity causes both adhesion and cohesion of water molecules.
C. Surface tension and capillary action are both caused by polarity.
D. Cohesion is where water molecules stick to molecules of other substances and
adhesion is where water molecules stick to other water molecules.
4. Which of the following is the MAIN difference between organic compounds and inorganic compounds?
A. Organic compounds are the building blocks of cells.
B. Organic compounds provide energy for cells.
C. Organic compounds contain hydrogen.
D. Organic compounds contain carbon.
5. Carbon atoms can bond together to form all of the following EXCEPT
A. chain structures.
C. inorganic structures.
B. covalent bonds.
D. ring structures.
6. What type of ion forms when an atom loses electrons?
B. polar
C. negative
D. neutral
A. positive
7. Which of the following properties of water is NOT caused by hydrogen bonding and polarity?
A. cohesion
D. surface tension
B. adhesion
E. All of the properties of water are a
result of hydrogen bonding and
polarity.
C. capillary action
8. All of the following are examples of carbohydrates EXCEPT
A. glucose.
B. cellulose.
D. glycogen.
C. steroids.
9. When salt is dissolved in water, water is the
A. solution.
B. solute.
D. reactant.
C. solvent.
10. How many hydrogen atoms can bond to 1 Carbon atom? (HINT: Hydrogen’s atomic number is 1; Carbon’s is 6)
A. 3
B. 1
D. 2
C. 4
11. Which is the LEAST likely trait of an organic molecule?
A. Amino and phosphate groups can be present.
B. Ionic bonds are present between the atoms.
C. The molecules will contain carbon and hydrogen.
D. The carbon backbone can form rings or chains.
12. Which of the following is the best molecule for long-term energy storage in a the cell?
A. proteins
B. polysaccharides
D. monosaccharides
C. lipids
13.An ionic bond is formed as the result of
C. sharing an electron pair.
A. transferring electrons.
B. transferring protons.
D. sharing a proton pair.
14. In a water molecule, shared electrons spend more time around the oxygen atom than the hydrogen atoms. As a
result, the oxygen atom is
A. slightly positive. B. very negative.
C. very positive.
D. slightly negative.
15. Lipids are insoluble in water, which means they will not mix. Why?
A. Lipids are polar molecules.
C. Lipids are nonpolar molecules.
B. Lipids are hydrophilic molecules.
D. Lipids are similar to water molecules.
16. A covalent bond is formed as the result of
C. transferring protons.
A. sharing an electron pair.
B. transferring electrons.
D. sharing a proton pair.
17. Which of the following is NOT a function of proteins?
A. Speed up chemical reactions in cells
C. Transport substances
B. Build tissues like bone, muscle, and blood D. Store and transmit genetic information
18. Which of the following satements about glucose is FALSE?
A. Glucose is a carbohydrate.
C. Glucose is a source of energy for the cell.
D. Glucose is a monosaccharide.
B. Glucose is a polysaccharide.
19. Unsaturated fatty acids contain
A. carbon atoms linked by single bonds.
B. carbon atoms that are each bonded to four other atoms.
C. carbon atoms linked by double bonds.
D. more than 100 carbon atoms.
20. Which of the following is NOT a monomer?
A. nucleotide
B. amino acid
D. monosaccharide
C. protein
21. Which polysaccharide is used to store glucose in animals?
A. cholesterol.
B. cellulose.
C. insulin.
D. glycogen.
22. Isotopes are atoms of the same element with the same number of protons and
A. the same number of neutrons.
C. a different number of electrons.
D. a different number of molecules.
B. a different number of neutrons.
23.
Refer to the illustration above. This molecule is a ___.
A. nucleotide
B. amino acid
C. fatty acid
D. monosaccharide
24. Photosynthesis uses sunlight to convert water and carbon dioxide into
A. oxygen.
C. ATP and oxygen.
B. high-energy sugars.
D. oxygen and high-energy sugars.
25. A student is collecting the gas given off from a plant in bright sunlight at a temperature of 27°C. The gas being
collected is probably
B. carbon dioxide.
C. ATP.
D. vaporized water.
A. oxygen.