Practice Digestive 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 digestive system, digestive organs, digestive glands, enzymes and the process of digestion.
The questions cover important areas such as the mouth, oesophagus, stomach, small intestine, large intestine, liver, pancreas, salivary glands, bile, digestive enzymes, absorption of nutrients and the functions of different parts of the digestive system. These concepts are important for General Science and Biology preparation for Railway examinations.
If you are preparing for RRB NTPC Digestive System PYQ, RRB Group D Digestive System PYQ, RRB JE Digestive System PYQ, RRB ALP Digestive System PYQ, or RRB Technician Digestive System PYQ, practice these previous year questions regularly to strengthen your Biology preparation.
Start practicing Digestive System RRB PYQs with answers and explanations to strengthen your Railway Biology preparation.
51
Which animal has a comparatively long intestine?
RRB ALP & Technician
14/08/2018 / Shift II
2018
✓ Answer:DRabbit
The rabbit is herbivorous and has a digestive tract adapted to processing plant material, including microbial fermentation.
52
_____ reduce the size of large fat globules, allowing enzymes to work more effectively.
RRB Group-D
25/08/2022 / Shift I
2022
✓ Answer:CBile salts
Bile salts emulsify fats into smaller droplets, exposing more surface to digestive enzymes.
53
In which part of the body is bile produced?
RRB NTPC (Stage-I)
18/04/2016 / Shift III
2016
✓ Answer:DLiver
Liver cells produce bile to aid fat digestion and absorption.
54
Tooth decay can begin when the pH in the mouth falls below approximately:
RRB ALP & Technician
09/08/2018 / Shift III
2018
✓ Answer:B5.5
The standard school-level threshold for enamel demineralization is approximately pH 5.5.
55
What is the effect of bile salts in food digestion?
RRB Group-D
13/09/2022 / Shift II
2022
✓ Answer:AThey break large fat globules into smaller droplets
Bile salts emulsify fat physically. They are not enzymes and do not themselves hydrolyse fat.
56
Which substance is stored and concentrated in the gallbladder?
RRB JE
24/05/2019 / Shift I
2019
✓ Answer:DBile
The gallbladder stores bile and concentrates it by absorbing water and electrolytes.
57
Which gives the greatest energy per unit mass on oxidation?
RRB JE
14/12/2014 / Green Paper
2014
✓ Answer:BFat
Fat provides about 9 kcal per gram, compared with about 4 kcal per gram for carbohydrate or protein.
58
Which figure shows the correct liver location in a person facing the reader? Diagram descriptions: Figure 1 places it centrally in the upper abdomen; Figure 2 on the reader's right; Figure 3 on the reader's left in the upper abdomen; Figure 4 centrally in the lower abdomen.
RRB Group-D
06/10/2022 / Shift I
2022
✓ Answer:DFigure 3
The liver lies mainly in the person's right upper abdomen, which appears on the reader's left in a front view. This is Figure 3. The source figures are described in text for the CSV.
59
Which organ produces bile juice?
RRB NTPC (Stage-I)
04/01/2021 / Shift I
2021
✓ Answer:ALiver
Bile is produced by the liver.
60
An adult human normally has how many incisors?
RRB Group-D
06/10/2022 / Shift I
2022
✓ Answer:BEight
Adults normally have eight incisors: four in the upper jaw and four in the lower jaw.
Showing 51 – 60 of 125 MCQ Questions | Page 6 of 13
Tags: Digestive System RRB Biology PYQ, Digestive System Previous Year Questions, RRB NTPC Digestive System PYQ, RRB Group D Digestive System PYQ, RRB JE Digestive System PYQ, RRB ALP Digestive System PYQ, RRB Technician Digestive System PYQ, Digestive System Questions for Railway Exams, Digestive System MCQ for RRB Exams, Human Digestive System RRB PYQ
![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)
