The pigment present in rod cells of the retina that is responsible for vision in dim light is: MCQ with Answer and Explanation

Explanation:
Fucoxanthin is a carotenoid that masks the green chlorophyll in brown algae (Phaeophyceae). Phycoerythrin is red, phycocyanin blue, chlorophyll b green.

Explanation:
Glucagon, from the pancreatic alpha cells, raises blood glucose by stimulating glycogenolysis and gluconeogenesis in the liver. Cortisol and growth hormone also raise blood glucose but glucagon is the primary direct antagonist of insulin. Thyroxine increases metabolic rate. The balance between insulin (hypoglycemic) and glucagon (hyperglycemic) maintains glucose homeostasis.

Explanation:
Essential amino acids (like lysine, tryptophan) cannot be synthesized by the human body and must be obtained through the diet. Dietary fiber (roughage) is indigestible plant material that adds bulk to stool, promotes peristalsis, and aids in digestion and preventing constipation. Saturated fats have no double bonds between carbon atoms, making them solid at room temperature (like butter); unsaturated fats are liquid (like oils). Thus, statements 1 and 3 are correct.