Which hormone regulates water reabsorption in the kidney collecting ducts? MCQ with Answer and Explanation

Explanation:
Ringworm (tinea) is a superficial fungal infection caused by dermatophytes (genera Trichophyton, Microsporum, Epidermophyton) that infect skin, hair, and nails. It is not a worm. Bacterial skin infections include impetigo, viral include warts, protozoan include leishmaniasis. Fungi are treated with antifungal agents.

Explanation:
Mitochondria and chloroplasts contain circular DNA and 70S ribosomes, enabling them to transcribe and translate some proteins independently, though they rely on nuclear genes for most proteins. This partial autonomy supports the endosymbiotic origin hypothesis. The presence of their own genetic material and protein synthesis machinery qualifies them as semi-autonomous. Thus, both assertion and reason are correct, and the reason correctly explains the assertion.

Explanation:
Catalase is found in peroxisomes and protects cells from oxidative damage by converting H₂O₂ (a toxic byproduct) into water and oxygen. Peroxidase also acts on peroxides but catalase is highly efficient. Amylase acts on starch, lipase on lipids. Liver and RBCs have high catalase activity.