The energy currency of the cell is: MCQ with Answer and Explanation

Explanation:
Senescence in plants is the biological process of aging, culminating in the structured, programmed death of plant organs (like leaves, flowers, or fruits) or the entire plant. It involves the coordinated breakdown of macromolecules (proteins, nucleic acids, chlorophyll) and the mobilization of nutrients (like nitrogen and phosphorus) from the senescing organ to other growing parts of the plant (like developing seeds). It is a highly regulated process influenced by hormones like ethylene and abscisic acid, and delayed by cytokinins.

Explanation:
The Glycemic Index (GI) is a numerical scale (from 0 to 100) that measures how quickly a carbohydrate-containing food raises blood glucose levels compared to a reference food (usually pure glucose or white bread). Foods with a high GI (like white bread, sugary drinks) cause a rapid spike in blood sugar, while low GI foods (like whole grains, legumes) cause a slower, more gradual rise. It does not measure total carbohydrate amount.

Explanation:
Amphibians have two atria and one ventricle; mixing of blood occurs because of the single ventricle. Complete separation is achieved only in four-chambered hearts. So A true, R false.