The human organ that detoxifies ammonia by converting it to urea is the: MCQ with Answer and Explanation

The human organ that detoxifies ammonia by converting it to urea is the:
A. Pancreas
B. Kidney
C. Intestine
D. Liver
Answer: Option D
Solution (By JKSSB Mock Tests)
The liver uses the urea cycle (ornithine cycle) to convert highly toxic ammonia, produced from amino acid deamination, into less toxic urea, which is excreted by the kidneys. The kidneys filter urea but do not synthesize it. Pancreas is digestive/endocrine, intestine absorbs nutrients.

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Practice More Biology Questions

Question #1
The Chipko movement is associated with the conservation of:
A. Soil
B. Wildlife
C. Water bodies
D. Forests

Correct Answer: Option D


Explanation:
The Chipko movement, initiated in the 1970s in Uttarakhand (India), involved villagers (mainly women) hugging trees to prevent them from being cut down by contractors. It was a non-violent protest for forest conservation and sustainable use. Sunderlal Bahuguna was a prominent leader. It raised awareness about deforestation and environmental protection.

This question belongs to: Science Biology
Question #2
Which organelle is known as the 'suicide bag' of the cell?
A. Golgi apparatus
B. Lysosome
C. Ribosome
D. Peroxisome

Correct Answer: Option B


Explanation:
Lysosomes contain hydrolytic enzymes that can digest cellular components and even the whole cell if they burst, a process called autolysis. Hence, they are called suicide bags. They also perform autophagy and phagocytosis. Peroxisomes detoxify peroxides, Golgi modifies proteins, ribosomes synthesize proteins. Lysosomes are formed from the Golgi apparatus.

This question belongs to: Science Biology
Question #3
Consider statements about ecology: 1. Primary succession occurs on bare rock. 2. Secondary succession occurs after a forest fire. 3. Climax community is unstable. Which are correct?
A. 1 and 2 only
B. 2 and 3 only
C. 1, 2 and 3
D. 1 and 3 only

Correct Answer: Option A


Explanation:
Primary succession begins on lifeless, barren substrates like bare rock, where no soil exists initially. Secondary succession occurs in areas where an existing community has been destroyed by disturbances like forest fires, floods, or logging, but soil remains. A climax community is the final, stable, and self-perpetuating stage of ecological succession, in equilibrium with the environment. Thus, statements 1 and 2 are correct.

This question belongs to: Science Biology