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NEET MDS Shorts

83015
Biochemistry

Vitamin D is crucial for the maintenance of bone health as it aids in the absorption of calcium from the digestive tract and facilitates the incorporation of calcium into bones. A deficiency in vitamin D can lead to osteoporosis, a condition characterized by weak and porous bones that are more susceptible to fractures, which is common in the elderly. While vitamin A (Answer 1) is important for vision and skin health, and niacin (Answer 2) and thiamine (Answer 3) have roles in energy metabolism and nerve function, respectively, vitamin D's primary role in calcium homeostasis makes it most relevant to bone loss in older individuals.

46890
Biochemistry

â-oxidation of fatty acid occursin Mitochondria

97174
Biochemistry

repeatablity of test is precision and getting results within reference range is accuracy

31789
Biochemistry

Gout is a form of arthritis caused by the accumulation of uric acid crystals, specifically sodium urate crystals, in the joints. The body produces uric acid as a waste product during the metabolism of purines, which are substances found in certain foods and also synthesized by the body. High levels of uric acid can lead to the formation of these crystals, which cause inflammation and pain in the affected joints. Urea (Answer 1) is a waste product formed from the metabolism of proteins and amino acids, while guanine (Answer 3) and hypoxanthine (Answer 4) are purine bases involved in nucleotide metabolism, but they do not directly form the crystals seen in gout.

42310
Biochemistry

Rate limiting step of Kreb's cycle is catalysed by isocitrate dehydrogenase

82700
Biochemistry

Anemia is a condition characterized by a decrease in the number of red blood cells or a reduction in their oxygen-carrying capacity. Vitamin B12 and folic acid are essential for the production of red blood cells. Deficiencies in these vitamins can lead to megaloblastic anemia, where the bone marrow produces abnormally large and immature red blood cells.

34849
Biochemistry

Iodine is a characteristic component of Thyroxine

30496
Biochemistry

Glycine is a Glycogenic amino acid, only

36542
Biochemistry

Uric acid is a purine derivative, increased by purine salvage reactions that convert purines, purine ribonucleosides, and purine deoxyribonucleoside to mononucleotides (incorrect answer 4).
 
Such salvage reactions require much less energy than de novo synthesis (incorrect answers 1, 2). The liver is the major site of purine nucleotide biosynthesis and provides excess purines for other tissues that cannot synthesize purines. 

A defect in hypoxanthine-guanine phosphoribosyl transferase, one of the enzymes of purine salvage, is responsible for purine overproduction and subsequent hyperuricemia observed in Lesch-Nyhan syndrome.

69756
Biochemistry

The immunoglobulin secreted in Bile is IgA

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