Which of the following is a correct match between the hormone and its function? MCQ with Answer and Explanation

Explanation:
Tissue culture is a technique where plant cells, tissues, or organs are grown on a synthetic nutrient medium (like MS medium) under aseptic conditions to regenerate whole plants. It exploits totipotency. It is used for micropropagation, production of disease-free plants, and conservation. Cloning produces genetically identical individuals, genetic engineering alters DNA, hybridization crosses different varieties.

Explanation:
Somatostatin is a powerful, universal inhibitory peptide hormone. In the gastrointestinal tract and pancreas, it is secreted by the Delta (D) cells of the pancreatic islets and the D cells of the gastric and intestinal mucosa. Its primary role in the GI tract is to act as a paracrine inhibitor, suppressing the release of almost all other gastrointestinal hormones, including gastrin, secretin, cholecystokinin (CCK), vasoactive intestinal peptide (VIP), and gastric inhibitory peptide (GIP). It also inhibits gastric acid secretion, pancreatic enzyme secretion, and intestinal motility, acting as a 'brake' on the digestive system.

Explanation:
The vacuole’s solute concentration draws water, generating turgor pressure that maintains cell rigidity. This is essential for support in plants. R explains A.