Lysosomes are rich in which type of enzymes? MCQ with Answer and Explanation

Lysosomes are rich in which type of enzymes?
A. Hydrolytic enzymes
B. Transferases
C. Oxidoreductases
D. Isomerases
Answer: Option A
Solution (By JKSSB Mock Tests)
Lysosomes contain about 40 types of hydrolytic enzymes (hydrolases) like proteases, lipases, nucleases, glycosidases, which digest macromolecules. They function in acidic pH (5.0). Oxidoreductases catalyze oxidation-reduction, transferases transfer groups, isomerases catalyze isomerization. Lysosomes are involved in autophagy, phagocytosis, and programmed cell death. Their rupture leads to autolysis, hence called 'suicide bags'.

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Practice More Biology Questions

Question #1
In the context of environmental pollution, 'Minamata disease' in Japan was caused by the severe contamination of water with:
A. Arsenic
B. Cadmium
C. Methylmercury
D. Lead

Correct Answer: Option C


Explanation:
Minamata disease is a severe neurological syndrome caused by severe mercury poisoning. It was first discovered in Minamata city, Kumamoto prefecture, Japan, in 1956. It was caused by the release of methylmercury in the industrial wastewater from the Chisso Corporation's chemical factory, which contaminated the local bay and the fish and shellfish. People who consumed the contaminated seafood suffered from severe neurological damage, including ataxia, numbness, and muscle weakness.

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Question #2
The oxygen-carrying protein in muscles is:
A. Hemoglobin
B. Hemocyanin
C. Cytochrome
D. Myoglobin

Correct Answer: Option D


Explanation:
Myoglobin is a red protein in muscle cells that stores oxygen and facilitates its diffusion during muscle contraction. It has a higher affinity for O₂ than hemoglobin, allowing oxygen transfer from blood to muscle. Hemoglobin is in RBCs, hemocyanin is in some invertebrates, cytochromes are electron carriers.

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Question #3
Consider statements about human diseases: 1. Typhoid is caused by a bacterium. 2. Malaria is caused by a protozoan. 3. Dengue is caused by a virus. Which are correct?
A. 2 and 3 only
B. 1, 2 and 3
C. 1 and 2 only
D. 1 and 3 only

Correct Answer: Option B


Explanation:
Typhoid fever is a systemic bacterial infection caused by Salmonella enterica serotype Typhi, transmitted through contaminated food and water. Malaria is a life-threatening disease caused by protozoan parasites of the genus Plasmodium (like P. falciparum), transmitted by Anopheles mosquitoes. Dengue fever is a viral infection caused by the Dengue virus (a flavivirus), transmitted by Aedes mosquitoes. All three statements correctly identify the causative agents of these major diseases.

This question belongs to: Science Biology