The scientist who discovered the structure of insulin was: MCQ with Answer and Explanation

Explanation:
Composite fish culture is a highly productive system used in inland fisheries (ponds) in India. It involves stocking a single pond with a combination of 5-6 different indigenous and exotic fish species that have complementary feeding habits (e.g., Catla are surface feeders, Rohu are column feeders, Mrigal and Common Carp are bottom feeders). This ensures that all available food resources in the different zones of the pond are utilized efficiently without interspecific competition, maximizing total yield.

Explanation:
Apoptosis is a highly regulated and organized process of programmed cell death that occurs in multicellular organisms. It is crucial for development, maintaining tissue homeostasis, and eliminating damaged or infected cells. Unlike necrosis (accidental cell death), apoptosis does not cause inflammation and involves cell shrinkage and fragmentation.

Explanation:
Tubular reabsorption occurs mainly in the proximal convoluted tubule, where essential substances like glucose, amino acids, and most water are reabsorbed into peritubular capillaries via active and passive transport. Glomerular filtration/ultrafiltration is the initial passive filtration of blood. Tubular secretion adds substances like H⁺ and K⁺ to filtrate.