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MCQs

Total Questions : 121 | Page 12 of 13 pages
Question 111. . Which of the following is a second messenger?
  1.    lnositol 1,4,5-triphosphate
  2.    Diacyl glycerol
  3.    Phospholipase C
  4.    Both (a) and (b)
 Discuss Question
Answer: Option D. -> Both (a) and (b)
Question 112. . Which of the following statement is incorrect?
  1.    The principal lipophilic hormones that binds to receptors located in the plasma membranes are prostaglandins
  2.    Prostaglandins are synthesized from arachidonic acid
  3.    Prostaglandins act as paracrine signaling molecules
  4.    None of the above
 Discuss Question
Answer: Option D. -> None of the above
Question 113. . Two key organizing principles for large multicellular organisms are
  1.    prokaryotic cell structure and cell specialization
  2.    cell specialization and communication between cells
  3.    communication between cells and simple nerve reflexes
  4.    simple nerve reflexes and cell specialization
 Discuss Question
Answer: Option B. -> cell specialization and communication between cells
Question 114. . Which of the following is a hormone whose action requires a cell surface receptor?
  1.    Nitric oxide
  2.    Progesterone
  3.    Adrenaline
  4.    Growth factors
 Discuss Question
Answer: Option C. -> Adrenaline
Question 115. . The hormone or ligand can be considered as
  1.    first messenger
  2.    second messenger
  3.    both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option A. -> first messenger
Question 116. . The major second messengers are
  1.    cAMP
  2.    cGMP
  3.    DAG
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 117. . The signaling molecules called steroid hormones
  1.    are made in one location of the body but have their effects some distance away
  2.    are hydrophilic and so cannot penetrate the plasma membrane
  3.    bind to cell surface receptors to trigger chemical cascades
  4.    never enter the blood of humans
 Discuss Question
Answer: Option A. -> are made in one location of the body but have their effects some distance away
Question 118. . Which of the following is a hormone whose action requires a cell surface receptor?
  1.    Nitric oxide
  2.    Progesterone
  3.    Adrenaline
  4.    Growth factors
 Discuss Question
Answer: Option C. -> Adrenaline
Question 119. . The hormone or ligand can be considered as
  1.    first messenger
  2.    second messenger
  3.    both (a) and (b)
  4.    none of these
 Discuss Question
Answer: Option A. -> first messenger
Question 120. . The major second messengers are
  1.    cAMP
  2.    cGMP
  3.    DAG
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these

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