MCQs Biology F.Sc. Part 2 ( 2nd Year )
Chapter No.17
Coordination and Control
Total MCQs = 219
All MCQs taken from Old MDCAT Tests
21. Which of the following is weedicide hormone:
(A) Auxin
(B) Gibberellin
(C) Abscisic acid
(D) Ethylene
Answer:
(A) Auxin
22. Gibberellic acid was discovered by:
(A) Hoshimata and Rappaport
(B) Donoho and Walker
(C) Yabuta and Hayashi
(D) Litrochet and Dolk
Answer:
(C) Yabuta and Hayashi
23. Plants may be made to grow taller by applying the chemical:
(A) Dichlorophenoxy acetic acid
(B) Trichlorophenoxy acetic acid
(C) Gibbereellic acid
(D) Phosphors
Answer:
(C) Gibbereellic acid
24. IAA, NAA and GA are:
(A) International seed companies
(B) Plant pheromones
(C) Spray adjuvants
(D) Plant hormones
Answer:
(D) Plant hormones
25. Ethene:
(A) Triggers ripening of fruit
(B) Promotes leaf abscission
(C) Initiates flowering
(D) All of the choices are correct
Answer:
(D) All of the choices are correct
26. The hormone responsible for delay of senescence is
(A) Ethene
(B) Gibberellin
(C) Abscisic acid
(D) Cytokinin
Answer:
(D) Cytokinin
27. The naturally occurring cytokinin is:
(A) Zeatin
(B) Kinetin
(C) Nepthatene acetic acid
(D) indole butyric acid
Answer:
(A) Zeatin
28. Gibberellin:
(A) Stimulate flowering
(B) Promote bud sprouting
(C) Stimulate growth of pollen tube
(D) All choices are correct
Answer:
(D) All choices are correct
29. Abscisic acid:
(A) Is growth inhibitor
(B) Produced during adverse conditions
(C) Induces seed dormancy
(D) All of the choices are correct
Answer:
(D) All of the choices are correct
30. Which of the following is NOT function of auxin?
(A) Induces parthenocarpy
(B) Promote apical sominance
(C) Promote abscission
(D) All of the choices are correct
Answer:
(C) Promote abscission
