BIO 168EXAM I: BiochemistryFall 2015Student: _________________________________________________________Fill in the Blank 2 pts. each.1. An atom is to a molecule, as monomer is to a(an) _______________________.2. Dietary fiber is an example of the macromolecule called________________________________.3. A protein that functions as a biological catalyst in chemical reactions is called a/an____________________________.4. Most cholesterol is used to synthesize ____________________, which regulate the bodyâsfunctions.5. A phospholipid contains __________________________ fatty acid tails.6. Fats are described as saturated if they have the element _______________________ at everyavailable bond.7. Dehydration synthesis is critical in the _________________________ of one amino acid toanother amino acid.8. Compounds that release H+ in solution are called ______________________________.9. A solution with a pH of 4 has _____________________ free floating hydrogen ions than asolution with a pH of 9.10. Variations in the ____________________ of each amino acid will give rise to the variation inthe chemical nature of proteins.11. An enzyme is the product of the ____________________________, which is stored in thenucleus of the cell.12. Carbohydrates are largely considered our source of _______________________ in the body.Multiple Choice 2 pts. each.________13. The chemical properties of an atom are determined by the number ofA. protons.B. electrons.C. neutrons.D. protons + neutrons.________14. The core element of all the macromolecules isA. nitrogen.B. hydrogen.C. carbon.D. oxygen.E. calcium________15. Proteins are formed using ______ different amino acids.A. 3B. 10C. 20D. 40E. 80________16. Individual proteins can form globular shapes. This results from reactions among Rgroups. These globular proteins exhibit the complexity ________ structure.A. primaryB. secondaryC. tertiaryD. quaternaryE. hexagonal________17. The enzyme, Amylase, which digests starch and is found in the saliva is anexample of a/anA. cofactors.B. isomers.C. isoenzymes.D. protein.E. cosubstrates.________18. Which of the following is (are) hydrophobic?A. glucoseB. cholesterolC. amino acidsD. proteinsE. disaccharides________19. The reaction glucose + glucose ? disaccride is an example ofA. an exchange reaction.B. a dehydration synthesis reaction.C. a decomposition reaction.D. a catalyzed reaction.E. an exergonic reaction.________20. Which of the following is a monomer?A. glucoseB. sucroseC. maltoseD. lactoseE. cellulose________21. The formula for an amine group isA. COOH.B. CH3.C. OH.D. NH2.E. SH.________22. A chain of 30 amino acids would be classified as a(an)A. fatty acid.B. nucleic acid.C. polysaccharide.D. polypeptide.E. triglyceride.________23. Proteins can serve all of the following functions exceptA. catalyze metabolic reactions.B. give structural strength to cells and tissues.C. produce muscular and other forms of movement.D. regulate transport of solutes into and out of cells.E. store hereditary information.________24. All of the following are minerals in the human body exceptA. sulfur.B. zinc.C. sodium.D. calcium.E. glucose.________25. In proteins the ______ determines the function.A. the RNAB. the structureC. the cellD. the hormonesMatching 2 pts each.________26. Carbohydratesa. coded for in the DNA________27. Lipidsb. nature exhibited by Crisco in water________28. Proteinsc. made of phospholipids________29. Nucleic Acidsd. uses deoxyribose as a sugar________30. Hydrophobice. example is high fructose corn syrup________31. Cell Membranesf. a sequence of these molecules is a gene________32. DNAg. contains a sugar-phosphate backbone________33. Amino Acidsh. estrogen and testosterone contain this molecule________34. Nucleotidesi. monomer that is a source of nitrogen________35. Cholesterolj. needed for hormones, insulation and structureShort Answer 2 pts each36. Describe the structure of a phospholipid and how its nature towards water makes it anideal component of our cell membranes.37. Why is carbon an ideal element for life forms?38. What is the relationship between DNA and protein?39. There is a diversity of enzymes/proteins produced in the body. How can we account forthis diversity?40. What function do carbohydrates serve our bodies? Why are lipids, which contain morecovalent bonds per oz. than carbohydrates, not used for this function primarily?41. Why are unsaturated fats supposedly better for us than the saturated fats?42. What evidence exists for the statement âYou are what you eat.â43. What is the function of the DNA?44. How does the body maintain a pH of 7.4?45. How is it that cancer is a âDisease of the Genomeâ?46. What was the most interesting fact you learned in this section?
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