Biology 1525 MCQs [All-Courses]

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.

Life span of Red Blood Cells_____?

A 150 Days

B 120 Days

C 80 Days

D 100 Days

Review Detailed Answer

Correct Answer: 120 Days

Typical example of water born disease_______?

A Malaria

B Cholera

C Typhoid

D Influenza

Review Detailed Answer

Correct Answer: Typhoid

How many hearts does an Octopus have?

A 1

B 2

C 3

D 4

Review Detailed Answer

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

Review Detailed Answer

Correct Answer: Increase

Which blood cells are called ‘Soldiers’ of the body_________?

A WBC

B Platelets

C RBC

D All of the above

Review Detailed Answer

Correct Answer: WBC

Acid present in gastric juice is_________?

A Hydrochloric Acid

B Citric Acid

C Sulphuric Acid

D Acetic Acid

Review Detailed Answer

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

Review Detailed Answer

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

Review Detailed Answer

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

Review Detailed Answer

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

Review Detailed Answer

Correct Answer: While some other will have 20

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Biology 1525 MCQs [All-Courses]

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All Topics 1525

Life span of Red Blood Cells_____?

Typical example of water born disease_______?

How many hearts does an Octopus have?

If the radius of blood vessels of a person decreases his/her blood pressure will__________?

Which blood cells are called ‘Soldiers’ of the body_________?

Acid present in gastric juice is_________?

The elimination of toxic nitrogenous waste and excess water in man is by______?

Tjio and Levan’s contribution is very significant because they __________ ?

A cistron is ________?

If the number of chromosomes in most body cells of a mammal is 40, the cells in the seminiferous tubule will have___________?