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.
51
Which one of the following combines with O₂ to provide energy in our body?
RRB Group-D
05/11/2018 (Shift-III)
2018
✓ Answer:DGlucose
The intended answer is glucose, the substrate used in the standard equation for aerobic respiration. Other fuels can also be oxidised to provide energy.
52
Breathing is harder at high altitudes compared to sea level because _____.
RRB Group-D
22/09/2022 (Shift-III)
2022
✓ Answer:DThe atmosphere is less dense at high altitudes
Atmospheric pressure and oxygen partial pressure decrease with altitude, reducing the oxygen available with each breath.
53
When respiration takes place in the absence of oxygen, it is called _____ respiration.
RRB NTPC (Stage-I)
23/01/2021 (Shift-I)
2021
✓ Answer:BAnaerobic
Anaerobic respiration or fermentation releases energy from substrates without using oxygen, as described in school-level terminology.
54
Anaerobic respiration occurs in the absence of _____.
RRB Group-D
30/10/2018 (Shift-II)
2018
✓ Answer:AOxygen
Anaerobic energy-releasing pathways operate without oxygen.
55
What is the role of cilia in the respiratory tract?
RRB Group-D
22/09/2022 (Shift-III)
2022
✓ Answer:BCilia sweep mucus from the lungs and airway towards the nose.
Cilia move mucus and trapped particles along the airways toward the throat for removal. The source describes this as movement towards the nose.
56
In the respiration process, complex organic compounds such as glucose are broken down to provide energy in the form of _____.
RRB NTPC (Stage-I)
09/01/2021 (Shift-I)
2021
✓ Answer:BATP
Energy released during cellular respiration is captured in ATP, adenosine triphosphate, which powers cellular activities.
57
Some features of a respiratory surface in animals are mentioned below. Select the INCORRECT option.
RRB Group-D
02/09/2022 (Shift-II)
2022
✓ Answer:BIs very thick
An efficient respiratory surface is thin, allowing rapid diffusion of gases, and has a large surface area.
58
When does aerobic respiration take place?
RRB NTPC (Stage-I)
02/03/2021 (Shift-II)
2021
✓ Answer:DBreakdown of glucose with the use of oxygen
Aerobic respiration breaks down glucose using oxygen and releases energy, with carbon dioxide and water as overall products.
59
Which of the following gases is essential for all aerobic forms of life?
RRB Group-D
08/09/2022 (Shift-III)
2022
✓ Answer:BO₂
Oxygen is required for aerobic respiration and serves as the final electron acceptor in the respiratory electron-transport chain.
60
Diffusion is a process by which:
RRB NTPC (Stage-I)
03/03/2021 (Shift-I)
2021
✓ Answer:COxygen can move across the plasma membrane
Oxygen moves across the plasma membrane by diffusion down its concentration or partial-pressure gradient.
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.
Tags: Respiratory System RRB Biology PYQ, Respiratory System Previous Year Questions, RRB NTPC Respiratory System PYQ, RRB Group D Respiratory System PYQ, RRB JE Respiratory System PYQ, RRB ALP Respiratory System PYQRRB Technician Respiratory System PYQRespiratory System Questions for Railway Exams, Respiratory System MCQ for RRB Exams, Human Respiratory System RRB PYQ, Respiratory System Biology Questions
![RRB JE Biology [PYQ FREE PDF] Question and Solved Problem with Solution](https://rrbjepyq.in/wp-content/uploads/2026/10/rrb-je-biology-feature-image-300x169.webp)
