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No verified paper has been uploaded for AJKPSC-PMS Chemistry Set-3 yet. The MCQs below are drawn from the Chemistry subject category.
Aldehydes and ketones can undergo various reactions, including nucleophilic addition, polymerization, and oxidation, due to their carbonyl group.
A Grignard reagent is a type of organometallic compound that reacts with both aldehydes and ketones to form alcohols. This is due to the highly nucleophilic nature of the Grignard reagent, allowing it to attack both carbonyl groups. The other options are specific reagents that react with aldehydes, making them incorrect choices.
Purines and pyrimidines are the building blocks of nucleotides, which form the structure of DNA and RNA. They are classified as nitrogenous bases due to their nitrogen-containing ring structures.
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
Manual review recommended: automated enrichment was incomplete for this item. The original answer and options were preserved. No Gemini key is configured. Add GEMINI_API_KEY to the local server environment or save a Gemini provider key in Settings.
Vitamin C (ascorbic acid) is vital for collagen synthesis, a key component of connective tissue. Vitamin B12 (cobalamin) is essential for erythropoiesis, the maturation of red blood cells. Vitamin A is typically associated with eye pigments (rhodopsin), and Vitamin D is the primary regulator of calcium absorption, not Vitamin C.
Silk is a natural protein fiber, primarily composed of the proteins fibroin and sericin. Fibroin is the structural core of the silk fiber, consisting of repeating amino acid sequences, mainly glycine, alanine, and serine. Because it is a polypeptide chain, it is classified as a protein, distinct from carbohydrate-based fibers like cotton or cellulose.
Calcium ions (Ca2+) play a critical role in the blood clotting cascade. They act as essential cofactors for several clotting factors, facilitating the conversion of prothrombin to thrombin, which is necessary for the formation of a stable fibrin clot.
Wool is a natural fiber obtained from sheep and is primarily composed of the protein keratin. Rubber is a polymer of isoprene (a hydrocarbon), while cotton and jute are natural fibers composed almost entirely of cellulose, which is a carbohydrate polymer.
