ch03Student: ___________________________________________________________________________

1. Which level of protein structure ultimately determines all the other levels of structure?    A. Primary B. Secondary C. Tertiary D. Quaternary

 2. Hydrogen bonds between different parts of the polypeptide chain result in which level of protein

structure?    A. Primary B. Secondary C. Tertiary D. Quaternary

 3. The final three-dimensional shape of a protein is its ____________ structure.    

A. Primary B. Secondary C. Tertiary D. Quaternary

 4. When a protein is composed of more than one polypeptide chain, the arrangement of the chains is called

the ____________ structure.    A. primary B.  secondary C.  tertiary D. quaternary

 5. Enzymes function to    

A.  add structural support. B. provide defense. C.  transport molecules. D. make chemical reactions more like to occur.

 6. The α-helix and β-pleated sheet are examples of which level of protein structure?    

A. Primary B. Secondary C. Tertiary D. Quaternary

 7. When a protein is denatured, which level of protein structure is unaffected?    

A. Primary B. Secondary C. Tertiary D. Quaternary

 8. Which polymer serves as the information storage molecule for cells?    

A. Carbohydrate B. Nucleic acid C. Protein D. Lipids

 

9. If one strand is CCAATTG on DNA then the complementary chain is    A. CCAATTG. B. AAGGUUC. C. GGUUAAC. D. GGTTAAC. E.  It is impossible to determine.

 10. The bases of the two DNA chains are linked in the middle of the molecule by _________ bonds.    

A.  covalent B.  ionic C. hydrogen D. There are no bonds connecting the chains.

 11. Which of the following is not true?    

A. There are 20 common amino acids that make up proteins. B. 

The amount of adenine equals the amount of thymine and the amount of cytosine equals the amount of guanine.

C. Lipids are not water soluble. D. The ratio of carbon atoms to hydrogen atoms to oxygen atoms is 1:2:1 in carbohydrates. E. Macromolecules are formed by hydrolysis reactions.

 12. The carbohydrate that plants use to store energy is called    

A.  starch. B.  cellulose. C.  fructose. D.  sucrose. E. chitin.

 13. The carbohydrate that is found in plant cell walls is    

A.  starch. B.  cellulose. C.  chitin. D.  fructose. E.  sucrose.

 14. A polysaccharide of glucose found in animals that is highly branched is    

A.  starch. B.  cellulose. C.  chitin. D.  glycogen. E.  sucrose.

 15. The external skeleton of many invertebrates is made of    

A.  starch. B.  cellulose. C.  chitin. D.  glycogen. E.  sucrose.

 16. Fats composed of fatty acids that have double bonds in the fatty acids and have fewer than the maximum

number of hydrogen atoms are    A.  saturated. B.  liquids at room temperature. C.  solid at room temperature. D.  generally found in animal fats.

 

17. Which of the following is incorrect about saturated fats?    A. They are solid at room temperature. B. They contain the maximum number of hydrogen atoms. C. They contain glycerol plus 3 fatty acids. D. They are nonpolar molecules that don't mix with water. E. They are generally the type of fat found in plants.

 18. All of the following are lipids except    

A. waxes. B.  cholesterol. C.  female sex hormones. D.  phospholipids. E. glycogen.

 19. Which of the following is a main component of cell membranes?    

A. Cellulose B. Sucrose C. Phospholipids D. Triglycerides E. Glycogen

 20. The sugar found in RNA is    

A.  lactose. B. glucose. C.  ribose. D.  deoxyribose. E. glycogen.

 21. Which is incorrect about proteins?    

A. The main function of proteins is energy storage. B. Proteins can be enzymes. C. Proteins are polymers of amino acids. D. The sequence of amino acids determines the primary structure of the protein. E. Some proteins have a transport function.

 22. The building blocks of carbohydrates are    

A.  amino acids. B. polypeptides. C. monosaccharides. D.  nucleotides.

 23. Animals store energy in a polymer composed of many glucose molecules called    

A.  starch. B. glycogen. C.  cellulose. D.  chitin.

 24. Fatty acids that contain the maximum number of hydrogen atoms possible are said to be    

A. polyunsaturated. B. monounsaturated. C.  saturated. D.  phospholipids.

 25. Proteins are made up of ____________ strung together by _________ bonds.    

A.  amino acids; peptide B. monosaccharides; nucleotide C. monomers; ionic D. polymers; hydrogen

 

26. Making and breaking molecules in the body require the aid of ____________ to help the reactions proceed.    A. heat B. water C. blood D.  enzymes

 27. Glucose is a type of carbohydrate called  _____________.    

A.  a polysaccharide B.  a disaccharide C.  a monosaccharide D.  a nucleotide

 28. Choose the statement that is true about DNA.    

A.  It exhibits base pairing. B.  It forms a double helix. C.  It is a polymer of nucleotides. D. All of these are correct.

 29. All of the following are ways RNA differs from DNA except    

A. RNA is single stranded. B. RNA is a nucleic acid. C. RNA contains ribose. D. RNA contains uracil.

 30. Denaturation of proteins is always a reversible process.    

True    False 31. Lipids are insoluble in water because they are nonpolar.    

True    False 32. Unsaturated fats are usually solid at room temperature.    

True    False 33. The sequence of nucleotides in DNA specifies the sequence of ________________ in a protein.    

________________________________________ 34. In RNA, thymine is replaced with ___________.    

________________________________________ 35. A __________ bond links two amino acids together.    

________________________________________ 36. Nucleic acids are long polymers of repeating subunits called ___________.    

________________________________________ 37. The polysaccharide found in the cell walls of plants is ___________.    

________________________________________ 38. Many mammals supply energy to their young in the form of ___________.    

________________________________________ 39. List the four major types of macromolecules, their subunits (building blocks), and their functions.    

 

 

 

 

40. Compare saturated and unsaturated fats with regard to source, structure, and consistency.    

 

 

 

 41. Describe the four levels of protein structure and how they are affected by denaturation.    

 

 

 

 42. Describe five functions of proteins.    

 

 

 

 43. Describe the structure of DNA.    

 

 

 

 

ch03 Key  1. A 2. B 3. C 4. D 5. D 6. B 7. A 8. B 9. D 10. C 11. E 12. A 13. B 14. D 15. C 16. B 17. E 18. E 19. C 20. C 21. A 22. C 23. B 24. C 25. A 26. D 27. C 28. D 29. B 30. FALSE 31. TRUE 32. FALSE 33. amino acids 34. uracil 35. peptide 36. nucleotides 

37. cellulose 38. lactose 39.  40.  41.  42.  43.  

ch03 Summary  Category # of Questions

Blooms Level: 1. Remember 31

Blooms Level: 2. Understand 12

Chapter - Chapter 03 43

Learning Outcome: 03.01.01 Distinguish between a polymer and a monomer. 2

Learning Outcome: 03.01.02 Contrast hydrolysis with dehydration synthesis. 1

Learning Outcome: 03.02.01 Explain what proteins do by listing five functional groupings of proteins. 1

Learning Outcome: 03.02.02 Diagram the structure of an amino acid, and the formation of a peptide bond. 3

Learning Outcome: 03.02.03 Describe the four general levels of protein structure, and how the polar nature of water influences them.

5

Learning Outcome: 03.02.04 Explain the forces that cause a protein to denature. 3

Learning Outcome: 03.02.05 Describe how the structure of an enzyme enables it to catalyze a chemical reaction. 1

Learning Outcome: 03.03.01 Name the three parts of a nucleotide. 2

Learning Outcome: 03.03.02 State the two major chemical differences between DNA and RNA. 5

Learning Outcome: 03.03.03 Identify what two base pairings are possible in DNA, and explain why the other four potential base pairings do not occur.

3

Learning Outcome: 03.04.01 Define carbohydrate. Distinguish between monosaccharides and polysaccharides. 8

Learning Outcome: 03.05.01 Distinguish between saturated and unsaturated fats, and explain why one is a solid and the other a liquid at room temperature.

9

Section: 03.01 4

Section: 03.02 13

Section: 03.03 10

Section: 03.04 9

Section: 03.05 8

Topic: Chemistry 43