The organism that causes sleeping sickness is transmitted by:
A. Mosquito
B. Housefly
C. Tick
D. Tsetse fly
Answer: Option D
Solution (By JKSSB Mock Tests)
African sleeping sickness (trypanosomiasis) is caused by Trypanosoma brucei and transmitted by the bite of the tsetse fly (Glossina). Malaria is by mosquito, typhoid by housefly (mechanical), Lyme disease by tick.
Explanation:
Peroxisomes contain enzymes like glycolate oxidase that participate in photorespiration, along with chloroplasts and mitochondria. They also detoxify peroxides. Lysosomes digest, mitochondria respire, chloroplasts photosynthesize.
Explanation:
Penicillin targets the transpeptidase enzyme, blocking peptidoglycan cross-linking, leading to cell lysis. This is the mechanism, so R correctly explains A.
Explanation:
Cataract is clouding of the crystalline lens leading to decreased vision, commonly age-related. Glaucoma is optic nerve damage often due to increased intraocular pressure. Myopia is nearsightedness, hypermetropia is farsightedness. Cataract surgery replaces the lens with an artificial one.
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