The condition caused by the accumulation of uric acid crystals in joints is:
A. Rheumatoid arthritis
B. Gout
C. Osteoarthritis
D. Osteoporosis
Answer: Option B
Solution (By JKExamLibrary)
Gout is a form of arthritis resulting from hyperuricemia and deposition of monosodium urate crystals in joints, causing intense pain and inflammation. It is often diet-related. Rheumatoid arthritis is autoimmune, osteoarthritis is degenerative, osteoporosis is loss of bone mass.
Consider the following statements about the nitrogen cycle:
1. Nitrogen fixation converts N₂ to ammonia.
2. Nitrification converts ammonia to nitrates.
3. Denitrification returns nitrogen to the atmosphere.
Which of the above is/are correct?
Explanation:
All three processes are part of the nitrogen cycle: fixation (N₂ → NH₃), nitrification (NH₃ → NO₂⁻ → NO₃⁻), and denitrification (NO₃⁻ → N₂).
Explanation:
Kingdom Monera includes all prokaryotic organisms, which lack a true nucleus and membrane-bound organelles. Cyanobacteria (blue-green algae) are prokaryotes and thus belong to Monera. Amoeba is a protist, while yeast and mushrooms are fungi, which belong to the Kingdom Fungi and are eukaryotic.
Explanation:
The interventricular septum is a thick muscular wall that divides the two ventricles, preventing mixing of oxygenated and deoxygenated blood. Valves prevent backflow, atria are upper chambers.
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