資訊推薦

• 40. Which of the following characteristics describe glycoproteins? (A) Proteins with covalently atta
• 41. What is the difference between RNA and DNA? (A) RNA contains thymine, while DNA contains uracil
• 42. How are nucleotides joined together to form nucleic acids? (A) By covalent bonds between the pho
• 43. Which of the following aqueous solutions has the lowest pH? The solutions have H+ concentration
• 44. What is a method for routine DNA sequencing of gene segments? (A) Polymerase chain reaction (PCR
• 45. What is the role of adenosine triphosphate (ATP) in cells? (A) It is a cofactor for enzyme catal
• 46. How does the genetic code vary among different species? (A) There are significant variations in
• 47. Which technique allows for the amplification of chosen segments of DNA for cloning? (A) Polymera
• 48. Which of the following is NOT a signal for termination of translation in bacteria? (A) UGA (B) U
• 49. What is the primary function of triacylglycerols? (A) To act as a storage form of energy (B) To
• 50. Where does transcription stop in bacteria? (A) At the terminator sequence (B) At the complementa
• 51. Which amino acid residues are commonly found at the lipid-water interface of transmembrane prote
• 52. What is the first step of bacterial transcription? (A) Binding of RNA polymerase to the promoter
• 53. What is the primary factor that affects the fluidity of biological membranes? (A) The temperatur
• 54. What is the primary fuel for heart muscle to obtain ATP? (A) Glucose (B) Fatty acids (C) Ketone
• 55. What type of transport is used by the lactose transporter of (E) coli? (A) Passive transport (B)
• 56. What is the end products of purine degradation in human? (A) Uric acid (B) Creatinine (C) Ammoni
• 57. What is the function of aquaporins? (A) To carry ions across membranes (B) To maintain the diffe
• 58. How is cholesterol transported in the blood? (A) As free cholesterol (B) As cholesteryl esters (
• 59. What is the starting material for the citric acid cycle? (A) Succinate (B) Acetyl-CoA (C) Fumara
• 60. What is the net gain of ATP molecules during glycolysis? (A) 1 ATP (B) 2 ATP (C) 3 ATP (D) 4 ATP
• 61. The urea cycle occurs mainly in the liver. How is ammonia formed in other tissues transported to
• 62. What key molecule connects the urea cycle with the TCA cycle? (A) Succinate (B) Acetyl-CoA (C) F
• 63. Which of the following is a protective enzyme in mitochondria that inactivates reactive oxygen s
• 64. What is the precursor for nucleotide and nucleic acid synthesis produced by the pentose phosphat