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Biology 1525 MCQs [All-Courses]

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Biology covers key concepts of life, organisms, and human systems with exam-focused notes for PPSC, FPSC, KPPSC, BPSC.,NTS, OTS, AJKPSC. Clear, concise topics help students prepare effectively for competitive tests.

All Topics  1525

Which of the followings are effectors______________?
A Muscles
B Glands
C Sensory organs
D Both ‘a’ & ‘b’
Correct Answer: Both ‘a’ & ‘b’
Co-ordination results in_____________?
A Regulation of body functions
B Organization of body functions
C Integration of body functions
D All of these
Correct Answer: All of these
Any change in the environment of an organism is called___________?
A Stimulus
B Variation
C Response
D Reaction
Correct Answer: Stimulus
Which of the following are responsible for the detection of changes in environment?
A Receptors
B Neurons
C Effectors
D All of these
Correct Answer: Receptors
Maximum speed of nerve impulse transmission is____________?
A 100 m/sec
B 110 m/sec
C 120m/sec
D 130 m/sec.
Correct Answer: 120m/sec
Which of the following has no central nervous system?
A Hydra
B Man
C Planaria
D Cockroach
Correct Answer: Hydra
Na+ -K+ ATPase pump is important for_______________?
A Maintenance of resting potential
B Massive out flux of K+ after depolarization
C Recovery of resting potential
D Conversion of resting potential into action potential
Correct Answer: Recovery of resting potential
Number of pairs of cranial nerves is__________?
A 10
B 11
C 12
D 13
Correct Answer: 12
Normal action potential of a neuronal cell is ___________?
A plus 50 mv
B plus 60 mv
C plus 70 mv
D plus 80 mv
Correct Answer: plus 50 mv
Insufficient secretion of iodothyroxine in adults causes____________?
A Myxedema
B Cretinism
C Goiter
D Exopthalmic goiter
Correct Answer: Myxedema
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