Practice Excretory 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 excretory system, kidneys, urinary organs, urine formation and removal of metabolic wastes from the body.
The questions cover important areas such as the kidneys, nephrons, ureters, urinary bladder, urethra, urine formation, filtration, reabsorption, secretion and the role of kidneys in maintaining the body’s internal balance. These concepts are important for General Science and Biology preparation for Railway examinations.
Start practicing Excretory System RRB PYQs with answers and explanations and strengthen your Railway Biology preparation.
31
The primary excretory product of _____ is uric acid.
RRB Group-D
29/08/2022 (Shift-II)
2022
✓ Answer:BBirds
Birds are uricotelic: they excrete nitrogenous waste mainly as uric acid, conserving water.
32
The filtration units of human kidneys are called _____.
RRB Group-D
28/09/2018 (Shift-I)
2018
✓ Answer:BNephron
Nephrons are the filtration and urine-forming units of the kidneys.
33
How is urea removed from the blood by an artificial kidney?
RRB Group-D
30/09/2022 (Shift-I)
2022
✓ Answer:ABy osmosis
The printed key gives A, osmosis, but this is scientifically inaccurate. In haemodialysis, urea moves mainly by diffusion across a semipermeable membrane into the dialysate. Diffusion is not among the options.
34
The urea cycle takes place in the human _____.
RRB Group-D
29/08/2022 (Shift-II)
2022
✓ Answer:BLiver
The urea cycle occurs in liver cells, with reactions in both mitochondria and cytosol. It converts toxic ammonia into urea.
35
The structural unit of the kidney is _____.
RRB Group-D
26/10/2018 (Shift-III)
2018
✓ Answer:DNephron
The nephron is the structural and functional unit of the kidney.
36
Which of the following parts connects the urinary bladder and the kidney?
RRB Group-D
17/09/2022 (Shift-II)
2022
✓ Answer:CUreters
The ureters carry urine from the kidneys to the urinary bladder.
37
Which of the following constitutes the human excretory system?
RRB Group-D
09/09/2022 (Shift-I)
2022
✓ Answer:COne pair of kidneys, one pair of ureters, single urinary bladder and single urethra
The human urinary system normally consists of two kidneys, two ureters, one urinary bladder and one urethra.
38
Which of the following is not a part of the human excretory system?
RRB NTPC (Stage-I)
26/04/2016 (Shift-II)
2016
✓ Answer:CUterus
The uterus belongs to the female reproductive system, not the urinary system.
39
The method of removal of nitrogenous waste using an artificial kidney is known as _____.
RRB Group-D
27/09/2022 (Shift-II)
2022
✓ Answer:BHaemodialysis
Haemodialysis uses a dialyser to remove wastes and excess fluid from blood when kidney function is inadequate.
40
An adult human's urine consists of:
RRB Group-D
06/10/2022 (Shift-III)
2022
✓ Answer:D95% water, 2.5% urea and 2.5% other waste products
The source uses the approximate composition of 95% water, 2.5% urea and 2.5% other dissolved substances. Actual composition varies.
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 Excretory 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 Excretory System PYQ, RRB Group D Excretory System PYQ, RRB JE Excretory System PYQ, RRB ALP Excretory System PYQ, or RRB Technician Excretory System PYQ, practice these previous year questions regularly to strengthen your Biology preparation.
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