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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

Life span of Red Blood Cells_____?
A 150 Days
B 120 Days
C 80 Days
D 100 Days
Correct Answer: 120 Days
Typical example of water born disease_______?
A Malaria
B Cholera
C Typhoid
D Influenza
Correct Answer: Typhoid
How many hearts does an Octopus have?
A 1
B 2
C 3
D 4
Correct Answer: 3
If the radius of blood vessels of a person decreases his/her blood pressure will__________?
A Decrease
B Increase
C Remain Same
D Becomes zero
Correct Answer: Increase
Which blood cells are called ‘Soldiers’ of the body_________?
A WBC
B Platelets
C RBC
D All of the above
Correct Answer: WBC
Acid present in gastric juice is_________?
A Hydrochloric Acid
B Citric Acid
C Sulphuric Acid
D Acetic Acid
Correct Answer: Hydrochloric Acid
The elimination of toxic nitrogenous waste and excess water in man is by______?
A Excretion
B Circulation
C Reproduction
D Pollution
Correct Answer: Excretion
Tjio and Levan’s contribution is very significant because they __________ ?
A Identified barr bodies
B Detected sex linkage
C Pointed out mutational changes
D Gave the number of human chromosomes
Correct Answer: Gave the number of human chromosomes
A cistron is ________?
A Structural of gene
B Functional unit of RNA
C Functional unit gene
D Replication unit of gene
Correct Answer: Functional unit gene
If the number of chromosomes in most body cells of a mammal is 40, the cells in the seminiferous tubule will have___________?
A 40 chromosomes
B 20 chromosomes
C 10 chromosomes
D While some other will have 20
Correct Answer: While some other will have 20
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