Biochemistry MCQ

1. Plants are being engineered to produce their own insecticides; therefore, __________.

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2. The attractive forces that are important in the secondary structure of a protein are ________.

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3. Regarding the models of cooperativity, _________.

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4. In the ionized form of an amino acid, the carboxylic acid end is ________.

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5. When cycling forward in a straight line, the knee is rotating about a(n) ____ axis.

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6. Bioinformatics can be used to scan for short sequences that specify known mrnas, called _____.

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7. In a dehydration synthesis reaction, __________ is always formed as a by-product of the reaction.

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8. In a dehydration reaction, ________. in order for this to occur water is ________.

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9. Hemoglobin has a total of ________ protein chains in its quaternary structure.

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10. Anabolic steroids are appropriately prescribed to __________.

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11. The proper three-dimensional shape and folding of a protein is assisted by _________.

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12. The important cholesterol-based molecules are __________.

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13. The skeletal structure of palmitoleic acid is shown below. palmitoleic acid is a ________.

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14. Enzymes are produced only _________________________.

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15. When ethylamine dissolves in water, a solution of __________ is produced.

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16. If digestion is ________, then synthesis is ________.

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17. The _____ store(s) more carbon than the atmosphere. trees soil oceans rock

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18. The assembly of glucose molecules into polysaccharides is a(n) _____ process.

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19. Histones have a large number of ________ residues.

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20. Alcohol is metabolized by the_________

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21. Acids and bases denature a protein by disrupting ________.

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22. Glycerophospholipids can interact both with other lipids and water because they contain ________.

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23. Cooking oil and gasoline (a hydrocarbon) are not amphipathic molecules because they _____.

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24. Hydrogen bonding is ultimately due to differences in _____ between two atoms.

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25. For cells that communicate by electrical synapses, the message travels between cells via ________.

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26. During digestion, _____ emulsify(ies) lipids.

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27. Chylomicrons are released from enterocytes into the _____ for transport.

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28. The energy for the polymerization of nucleotides comes from____.

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29. Rotation about a carbon-carbon double bond does not readily occur because _________.

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30. Chymotrypsin catalyzes the hydrolysis of a peptide bond and is therefore categorized as a _____.

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31. Atoms with the same number of protons but with different electrical charges _____

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32. Chemoreceptors that monitor o2 and co2 content and ph are located in the _________.

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33. Guided by powerful signaling molecules, the human heart develops from __________.

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34. Because bile is not secreted into the duodenum with cirrhosis, stools are _____ colored.

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35. Complete the equation: monosaccharide + monosaccharide ? ______ + water

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36. Conventional genetic analyses of rrna sequences is not possible for prions because __________.

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37. The relation between amino acid and polypeptide is similar to the relation between ________.

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38. The formation of an enzyme-substrate complex is the ________ step in enzyme action.

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39. Sugars are molecules that have __________ c:h:o and are called __________.

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40. Maltose has a (1→4) linkage between glucose and ________.

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41. For a protein to be an integral membrane protein, it would have to be _____.

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42. For a molecule to have optical isomers, it must have _____.

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43. Biochemical tests _________________.

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44. An acid can denature a protein by ________.

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45. Much of the stability of the double-stranded dna structure is the result of ________.

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46. Most ______ have well defined 3' ends terminating in poly(a) tails of ~ 200 nucleotides.

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47. Healthy cells produce ________ in response to interferons.

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48. Prostaglandins are involved in _________.

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49. Evan and evelyn are twins but are not genetically identical. they are ________ twins.

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50. The redundancy of the genetic code is a consequence of ______.

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51. The membrane's permeability to sodium ions is at its maximum at label _____.

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52. Anomers of d-glucopyranose differ in their stereochemistry at ________.

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53. Enzymes that hydrolyze lipids are ________; substances that emulsify lipids are ________.

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54. The hormone __________ induces lipolysis, whereas the hormone __________ inhibits the process.

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55. Each specific amino acid has a unique ______.

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56. During the citric acid cycle, both nad and fad ________ a hydrogen atom and become ________.

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57. This figure is an example of a(n) _____.

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58. Fatty acid groups are referred to as ________ groups.

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59. Glycogen is to animal cells as ________ is to plant cells.

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60. In eukaryotes, the first step in the control of gene expression is ______.

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61. 3 % nacl is _________________ to the elodea leaf.

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62. Cellulose is a polysaccharide with ______ linkages?

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63. The co2 produced in the pentose phosphate shunt comes from carbon number _____ of glucose.

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64. Centrifuges used for biohazardous materials must be covered primarily to avoid _____.

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65. Biochemistry is the study of _____

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66. A higher concentration of molecules causes a faster chemical reaction. this is known as _____.

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67. Sticky ends are produced as a result of the action of ______.

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68. __________ is always involved in hydrolysis reactions.

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69. The amphipathic property of phospholipids can be described as ________.

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70. The nucleotide sequence of a polynucleotide chain is called the ________ structure.

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71. Phosphofructokinase is allosterically _____ by high concentrations of _____.

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72. The stoichiometry of the atp synthase f0 base is ________.

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73. A lineweaver-burk plot is a _____.

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74. To make restriction fragments, a dna sample is treated with ______.

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75. Transgenic animals are currently used ______.

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76. Which of the following statements is false? saturated fats _____.

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77. The skeletal structure below is that of a ________.

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78. The melting temperature of dna ________ with increasing g plus c content.

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79. Side chains of amino acids _____.

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80. Poisons like cyanide bind to ________ and prevent electron transfer.

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81. Oils are generally ________ at room temperature and are obtained from ________.

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82. Myoglobin and a single chain of hemoglobin have similar ______ structures.

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83. Monosaccharide + monosaccharide → ______ + water

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84. Macromolecules, the molecules of life, include all of the following except __________.

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85. In the process of nitrification, nitrate reductase converts _____ into _____.

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86. In the peptide glviw, the c-terminal end is ________.

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87. In terms of energy storage, _______ is to animals what _______ is to plants.

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88. In living organisms, dna exists as a __________ with the strand(s) __________.

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89. In a hydrolysis reaction, __________, and in this process, water is __________.

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90. Fats are generally ________ at room temperature and are obtained from ________.

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91. Fat molecules do not ________.

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92. Eukaryotic initiation begins with the assembly of ________________.

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93. Enthalpy (h) is the _____.

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94. Denaturing gel electrophoresis separates proteins based on differences in _______.

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95. Compared to an uncatalyzed reaction, an enzyme-catalyzed reaction ________.

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96. Atoms from the amino acids _____ are utilized in purine biosynthesis.

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97. An extremely efficient enzyme has a _____ km and a _____ kcat.

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98. A peptide bond binds _____.

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99. ______ is a steroid.

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