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MCQs

Total Questions : 76 | Page 7 of 8 pages
Question 61. Which of the following is false?
  1.    Heme consists of a complex organic ring structure, protoporphyrin
  2.    Protoporphyrin is bound to a single iron atom in its Fe+3 state
  3.    Iron atom has 6 coordination bonds
  4.    Heme is found in a number of oxygen transporting proteins
 Discuss Question
Answer: Option B. -> Protoporphyrin is bound to a single iron atom in its Fe+3 state
Answer: (b).Protoporphyrin is bound to a single iron atom in its Fe+3 state
Question 62. Myoglobin is particularly abundant in ________
  1.    Nerves
  2.    Muscles
  3.    Blood cells
  4.    Skin
 Discuss Question
Answer: Option B. -> Muscles
Answer: (b).Muscles
Question 63. Which of the following is a correct relation?
  1.    Kd [L] = [PL] ⁄ [P]
  2.    Kd [L] = [P] ⁄ [PL]
  3.    Kd [L] = [PL] × [P]
  4.    Kd [PL] = [L] ⁄ [P]
 Discuss Question
Answer: Option A. -> Kd [L] = [PL] ⁄ [P]
Answer: (a).Kd [L] = [PL] ⁄ [P]
Question 64. His⁹³ is also called ________
  1.    His F8
  2.    His F7
  3.    His F6
  4.    His F5
 Discuss Question
Answer: Option A. -> His F8
Answer: (a).His F8
Question 65. Which of the following is a correct relation?
  1.    Ka [L] = [PL] ⁄ [P]
  2.    Ka [L] = [P] ⁄ [PL]
  3.    Ka [L] = [PL] × [P]
  4.    Ka [PL] = [L] ⁄ [P]
 Discuss Question
Answer: Option A. -> Ka [L] = [PL] ⁄ [P]
Answer: (a).Ka [L] = [PL] ⁄ [P]
Question 66. Beta pleated sheets are examples of protein's
  1.    primary structure
  2.    secondary structure
  3.    quaternary structure
  4.    tertiary structure
 Discuss Question
Answer: Option B. -> secondary structure
Question 67. Metastasis involves
  1.    decreased levels of proteins that regulate metalloproteins
  2.    ability of cells to dissolve cellular matrix
  3.    metalloprotein levels
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 68. Signal sequences are part of a protein that
  1.    transport proteins to other sites within the cell
  2.    signal the protein synthesis on the ribosomes is ended
  3.    refold proteins in prion-associated diseases
  4.    signal folding of the protein
 Discuss Question
Answer: Option A. -> transport proteins to other sites within the cell
Question 69. BRACl, an inherited form of breast cancer, regulates cell division by
  1.    binding to a DNA sequence
  2.    complexing with cyclins
  3.    binding to the cell outer membrane
  4.    binding to the protein RAD 51 which repairs DNA damage
 Discuss Question
Answer: Option D. -> binding to the protein RAD 51 which repairs DNA damage
Question 70. Individuals with PKU disease are mentally retarded unless
  1.    tyrosine in the diet is restricted
  2.    homogentisic acid in the diet is restricted
  3.    phenylalanine in the diet is restricted
  4.    None of these
 Discuss Question
Answer: Option C. -> phenylalanine in the diet is restricted

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