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MCQs

Total Questions : 66 | Page 2 of 7 pages
Question 11. What is the radius of the tight junctions?
  1.    3 Å
  2.    4 Å
  3.    5 Å
  4.    6 Å
 Discuss Question
Answer: Option B. -> 4 Å
Answer: (b).4 Å
Question 12. Gap junctions are otherwise known as plasmodesmata.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 13. Who discovered plasmodesmata?
  1.    Strasburger
  2.    Boveri
  3.    J Rhodin
  4.    Van Beneden
 Discuss Question
Answer: Option A. -> Strasburger
Answer: (a).Strasburger
Question 14. How many plasmodesmata are present in a plant cell?
  1.    10
  2.    100
  3.    1000
  4.    5
 Discuss Question
Answer: Option C. -> 1000
Answer: (c).1000
Question 15. Gap junctions are absent in __________
  1.    Sperm cells
  2.    Reproductive cells
  3.    Cardiac cells
  4.    Brain cells
 Discuss Question
Answer: Option A. -> Sperm cells
Answer: (a).Sperm cells
Question 16. What is the diameter of a gap junction?
  1.    2.2 – 3 nm
  2.    3 – 3.2 nm
  3.    1.2 – 2 nm
  4.    0.2 – 2 nm
 Discuss Question
Answer: Option C. -> 1.2 – 2 nm
Answer: (c).1.2 – 2 nm
Question 17. Which cell organelle covers the plasmodesmata of the cells?
  1.    Ribosome
  2.    Nucleus
  3.    Rough endoplasmic Reticulum
  4.    Smooth endoplasmic reticulum
 Discuss Question
Answer: Option D. -> Smooth endoplasmic reticulum
Answer: (d).Smooth endoplasmic reticulum
Question 18. What is the chemical formula for rotigaptide?
  1.    C₂₈H₃₉N₇O₉
  2.    C₂₈H₃₉N₇O₈
  3.    C₂₈H₃₈N₇O₉
  4.    C₂₇H₃₉N₇O₉
 Discuss Question
Answer: Option A. -> C₂₈H₃₉N₇O₉
Answer: (a).C₂₈H₃₉N₇O₉
Question 19. What is the gap junction in nerves called?
  1.    Chemical synapse
  2.    Electrical synapse
  3.    Post synapse
  4.    Pre synapse
 Discuss Question
Answer: Option B. -> Electrical synapse
Answer: (b).Electrical synapse
Question 20. Which genetic disorder is associated with dysfunction of gap junction?
  1.    Vohwinkel’s syndrome
  2.    Down’s syndrome
  3.    Zellweger Syndrome
  4.    Bubble Boy Syndrome
 Discuss Question
Answer: Option A. -> Vohwinkel’s syndrome
Answer: (a).Vohwinkel’s syndrome

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