GS Biology Questions with Answers | General Science GK | Page 36

GS Biology questions with answers enhance your general science knowledge, especially for exams like SSC, Railways, and UPSC. Biology is an important branch of general science that deals with the study of life, organisms, and their vital processes. These general science questions and answers cover topics such as cells, human anatomy, genetics, and ecology — frequently asked in competitive exams. Practicing these questions helps you understand biological concepts clearly and boosts your score in the general awareness section. Strengthen your science fundamentals and prepare effectively for multiple-choice questions in upcoming tests.

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Q351

In frog, cutaneous respiration takes place

A Only in water when pulmonary respiration does not take place
B Only in water but along with pulmonary respiration
C Only on land
D Always

Answer: Option D

Explanation: Frogs respire through skin and lungs both.

Q352

At high altitude, RBCs of human blood will

A Increase in number
B Decrease in number
C Decrease in size
D Increase in size

Answer: Option A

Explanation: High altitude triggers more RBC production to carry oxygen.

Q353

Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is

A Inefficient ventilation with little residual air
B Inefficient ventilation with high residual air
C Efficient ventilation with no residual air
D Efficient ventilation with little residual air

Answer: Option D

Explanation: Alveoli increase surface area, aiding efficient gas exchange.

Q354

The narrowest and most numerous tubes of lungs are termed as

A Bronchus
B Alveoli
C Bronchioles
D Hilum

Answer: Option C

Explanation: Bronchioles are small air passages leading to alveoli.

Q355

The exchange of gases in a mammal takes place in

A Trachea
B Bronchioles
C Bronchi
D Alveoli

Answer: Option D

Explanation: Gas exchange occurs in alveoli sacs.

Q356

Tidal volume of air in a normal healthy man during inspiration is about

A 300-400 ml
B 500-700 ml
C 900-1000 ml
D 100-250 ml

Answer: Option B

Explanation: Average tidal volume is approximately 500 ml.

Q357

After complete exhalation, the lungs of a healthy man contain a liter of gas, known as

A Residual volume
B Functional residual capacity
C Total lung capacity
D Dead space

Answer: Option A

Explanation: Residual volume is the air remaining after forced exhalation.

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GS Biology Questions and Answers

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