12th Class Biology MCQs Coordination & Control MDCAT

12th Class MCQs ( Multiple Choice Questions )
Biology F.Sc. Part 2 ( 2nd Year )
Medical College Admission Test, ECAT Engineering College Admission Tests , University Admission Test, Pakistan Medical Commission ( PMC ) Islamabad

Chapter No.17
Coordination and Control
Total MCQs = 219

1. The name of metabolic processes are interwoven by:

(A) in coordination
(B) Subordination
(C) Coordination
(D) All (A), (B) and (C)

2. A cell or group of cells specialized to detect changes in the environment and trigger impulses are know as:

(A) Effectors
(B) Receptors
(C) Suppressors
(D) (B) and (C)

3. The term Auxin was coined by:

(A) T-yabuta 1970
(B) F.W. Went 1926
(C) Walter 1928
(D) Hoshimata 1910

4. You duck your head when a baseball is thrown toward your face. You are responding to:

(A) An internal stimulus
(B) An external stimulus
(C) Hormones
(D) ALL

5. A plant response to touch is called:

(A) Photoperiodism
(B) Geotropism
(C) Thigmotropism
(D) Phototropism

6. The biological clock is time measuring system which is independent and is:

(A) Endogenous
(B) Exogenous
(C) Both (A) and (B)
(D) None of these

7. If bio-rhythm occurs with a frequency of 24 hours, it is called:

(A) Circadian rhythm
(B) Circa-annual rhythm
(C) Lunar rhythm
(D) All of the choices are correct

8. Photosynthesis and luminescence in algae and dinoflagelltes, CO2 metabolism in Bryophyulm are:

(A) Dependent on light and temperature
(B) Exogenous in origin
(C) Independent of light and temperature
(D) All of the choices are correct

9. The influence of daily cycle of light and darkness on the physiology and behavior of an organism is known as:

(A) Mechanical rhythm
(B) Chemoperiodism
(C) Photoperiodism
(D) Thigmotropism

10. The synthesis and release of abscisic acid in a plant is response to:

(A) Water deficit
(B) Oxygen deprivation
(C) Salt stress
(D) Herbivory

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