NEET Biology: Modes of excretion-uricotelism Practice Questions
15 free multiple-choice questions on Modes of excretion-uricotelism (Excretory Products and their elimination) for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. The main site where the final elimination of uric acid occurs in animals exhibiting uricotelism is generally the:
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Correct answer: B — Bladder
While the liver processes the waste, the final storage and elimination pathway for uric acid occurs via the urinary system (kidneys and bladder).
Q2. The formation of uric acid from nitrogenous waste in reptiles and birds involves a process that generally follows the pathway of:
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Correct answer: C — Uric acid formation
In these animals, the pathway involves the conversion of nitrogenous compounds ultimately resulting in the formation and excretion of uric acid.
Q3. Which group of animals typically exhibits the mode of excretion known as uricotelism?
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Correct answer: C — Reptiles
Reptiles and birds are the primary examples of animals that excrete nitrogenous waste as uric acid (uricotelism).
Q4. Uricotelism is considered a highly efficient method of nitrogenous waste elimination because:
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Correct answer: D — It requires minimal water for excretion.
Excreting waste as a semi-solid paste (uric acid) requires significantly less water compared to the highly soluble urea produced in ureotelism.
Q5. Compared to urea excretion, the elimination of nitrogenous waste as uric acid requires:
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Correct answer: D — Significantly less water
Since uric acid is less water-soluble, animals excreting it save water compared to the highly aqueous urea solution.
Q6. In animals exhibiting uricotelism, the primary excretory organ responsible for the elimination of nitrogenous waste is the:
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Correct answer: D — Kidneys
The kidneys play the crucial role in filtering blood and excreting metabolic wastes, including uric acid, in uricotelic animals.
Q7. Compared to urea excretion, the excretion of uric acid in uricotelic animals results in:
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Correct answer: C — less water loss
Excreting uric acid, which requires less water than urea, leads to better water conservation in these animals.
Q8. The process that results in the formation of uric acid involves the breakdown of nitrogenous compounds:
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Correct answer: C — Ammonia
The breakdown of amino acids and subsequent metabolic pathways lead to the formation and excretion of uric acid.
Q9. The presence of uric acid in the form of a semi-solid paste is related to which characteristic of its elimination process?
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Correct answer: C — Reduced need for water
Uric acid is semi-solid, allowing it to be excreted as a semi-solid paste rather than a highly aqueous solution, thus conserving water.
Q10. The primary nitrogenous waste product excreted by animals exhibiting uricotelism is:
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Correct answer: B — Uric acid
Uric acid is the main end product of nitrogenous waste metabolism and is excreted in uricotelic animals.
Q11. In birds, the nitrogenous waste is excreted as uric acid. This method is evolutionarily advantageous primarily because it promotes:
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Correct answer: C — Minimization of water loss
Excreting nitrogenous waste as semi-solid uric acid minimizes the water required for elimination, which is crucial for terrestrial animals.
Q12. Which mode of excretion involves the formation and elimination of uric acid as the primary nitrogenous waste product?
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Correct answer: D — Uricotelism
Uricotelism is the mode of excretion where nitrogenous waste is excreted as uric acid, characteristic of birds and reptiles.
Q13. Which of the following represents the primary form in which nitrogenous waste is excreted by animals exhibiting uricotelism?
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Correct answer: A — Uric acid
Animals exhibiting uricotelism (like reptiles and birds) excrete nitrogenous waste primarily as uric acid, which is a semi-solid paste, minimizing water loss.
Q14. Which statement correctly describes the fate of nitrogenous waste in organisms that practice uricotelism?
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Correct answer: A — Waste is converted into uric acid for excretion.
Uricotelism involves the conversion of nitrogenous waste into the relatively insoluble and easily excreted form, uric acid.
Q15. Which group of animals exhibits the mode of excretion known as uricotelism?
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Correct answer: A — Reptiles
Reptiles and birds exhibit uricotelism, excreting uric acid as their primary nitrogenous waste product.
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