Which of the following is an example of a sexually transmitted disease (STD)? MCQ with Answer and Explanation

Explanation:
Iron (Fe²⁺) is a central component of the heme group in hemoglobin, enabling oxygen binding. Deficiency leads to iron-deficiency anemia, characterized by fatigue, pallor, and reduced oxygen-carrying capacity. Calcium is for bones and clotting, magnesium is a cofactor and in chlorophyll, potassium is for nerve impulses. Iron is obtained from diet (meat, leafy greens).

Explanation:
Cuscuta (dodder) is a parasitic plant that lacks chlorophyll and derives nutrients from the host plant through haustoria. It is a total stem parasite. Mango, neem, and sunflower are autotrophic plants performing photosynthesis. Heterotrophic plants include parasites (Cuscuta, Rafflesia) and saprophytes (Monotropa).

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.