Practice Respiratory System RRB PYQ questions from Railway examinations, including RRB NTPC PYQ, RRB Group D PYQ, RRB JE PYQ, RRB ALP PYQ and RRB Technician PYQ. This topic-wise Biology question set covers important concepts related to the human respiratory system, respiratory organs, breathing and the exchange of gases.
The questions cover important areas such as the nose, nasal cavity, pharynx, larynx, trachea, bronchi, lungs, alveoli, diaphragm, breathing mechanism, inhalation and exhalation, exchange of oxygen and carbon dioxide, and cellular respiration. These concepts are important for General Science and Biology preparation for Railway examinations.
Start practicing Respiratory System RRB PYQs with answers and explanations and strengthen your Railway Biology preparation.
1
Name the process through which gaseous exchange takes place across the cell membrane.
RRB Group-D
19/09/2022 (Shift-III)
2022
✓ Answer:DDiffusion
Oxygen and carbon dioxide move across membranes by diffusion, down their partial-pressure gradients.
2
Glucose in the cytoplasm is broken down into pyruvic acid. By which process is this pyruvic acid converted into ethanol and carbon dioxide?
Yeast converts pyruvate into ethanol and carbon dioxide during alcoholic fermentation in the absence of oxygen. Options B and C are identical in the source.
3
Which of the following is the common product produced during aerobic and anaerobic respiration initially in the first step?
RRB Group-D
23/08/2022 (Shift-II)
2022
✓ Answer:APyruvate
Glycolysis is the common initial pathway and produces pyruvate from glucose in the cytoplasm.
4
The main reason we are dependent on air is our _____.
RRB JE (Stage-II)
22/04/2025 (Shift-I)
2025
✓ Answer:ARespiration
Air supplies oxygen needed for aerobic cellular respiration, which releases energy from food.
5
Anaerobic respiration of glucose in the muscles produces _____.
RRB Group-D
28/09/2022 (Shift-II)
2022
✓ Answer:ALactic acid
During anaerobic metabolism in muscle cells, pyruvate is converted into lactate, commonly called lactic acid in school texts.
6
Which of the following statements related to respiration is/are correct? (i) Pyruvate is converted into ethanol and carbon dioxide during fermentation in yeast. (ii) Breakdown of pyruvate using oxygen takes place in chloroplasts. (iii) In muscle cells, pyruvate is converted into lactic acid.
Statements (i) and (iii) are correct. Aerobic oxidation of pyruvate occurs in mitochondria, not chloroplasts; muscle cells can convert pyruvate into lactate when oxygen supply is insufficient.
7
Which of the following is required for the breakdown of glucose in human cells to provide energy?
RRB Group-D
16/09/2022 (Shift-II)
2022
✓ Answer:AOxygen
The intended answer is oxygen, which is required for aerobic glucose oxidation. Some ATP can also be generated through anaerobic glycolysis.
8
In humans, air enters through the nostrils and from there flows through the larynx into the lungs. Which of the following ensures that the airway does not collapse in the larynx?
Cartilage supports the airway. The larynx has supporting cartilages, including the ring-shaped cricoid cartilage; the trachea is supported by C-shaped cartilage rings.
9
Through which organ is air taken into the body of human beings?
RRB Group-D
16/09/2022 (Shift-II)
2022
✓ Answer:CNostrils
Nostrils are the external openings through which air normally enters the nasal cavities.
10
Which of the following statements related to respiration is/are correct? (i) Exchange of gases takes place in the alveoli. (ii) The walls of the alveoli contain an extensive network of blood vessels. (iii) In humans, the respiratory pigment is haemoglobin.
Each question includes the correct answer and a clear explanation, helping you understand the concept behind the answer and revise important Biology topics effectively. Practising Respiratory System Previous Year Questions can also help you become familiar with the types of Biology questions asked in RRB examinations.
Whether you are preparing for RRB NTPC Respiratory System PYQ, RRB Group D Respiratory System PYQ, RRB JE Respiratory System PYQ, RRB ALP Respiratory System PYQ, or RRB Technician Respiratory System PYQ, practice these previous year questions regularly to strengthen your Biology preparation.
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