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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

The glycolate produced diffuses into the membrane bounded organelles called____________?
A Glyoxisomes
B Peroxisomes
C Lysosomes
D Mitochondria
Correct Answer: Peroxisomes
The air spaces may comprise upto _________ of total volume of leaf surface?
A 30%
B 20%
C 40%
D 50%
Correct Answer: 40%
There are _________ stomata per square cm of leaf surface in Tobacco plants?
A 1200
B 12000
C 100,000
D 1000
Correct Answer: 100,000
Important factors which affect the capacity of haemoglobin to combine with oxygen is
A Temperature
B Carbon dioxide
C pH
D All of these
Correct Answer: All of these
Water is _________ times viscous than air?
A 50
B 1000
C 5000
D 8000
Correct Answer: 50
Haemoglobin can be almost completely oxygenated by an oxygen pressure of __________ of mercury.
A 10 mm
B 60 mm
C 10 cm
D 100 mm
Correct Answer: 100 mm
Oxygen contents per liter of air is____________?
A 10 ml
B 100 ml
C 200 ml
D 100ml
Correct Answer: 200 ml
The maximum amount of oxygen which normal human blood absorbs and carries at sea level is ________ per 100 ml of blood.
A 10 ml
B 20 ml
C 30 ml
D 40 ml
Correct Answer: 20 ml
Of the following, which one is better respiratory medium___________?
A Air
B Water
C Soil
D None of these
Correct Answer: Air
During rest the breathing occurs rhythmically at the frequency of _________ times per minute in human?
A 16-30
B 15-20
C 5?10
D 6?12
Correct Answer: 15-20
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