Pelargonidin is a molecule responsible for the red color of the geranium flower and also contributes to the color of ripe strawberries and raspberries. The structure of pelargonidin is:

Pelargondin is an anthocyanin responsible for the red color in geraniums, strawberries, and raspberries. It is pH-sensitive, changing color with changes in acidity, and is important in both horticulture and food science for its coloring and potential health benefits.

Explanation:

The molecule responsible for the red coloring of the geranium flower, as well as contributing to the color of ripe strawberries and raspberries, is known as pelargondin. Pelargondin is a type of anthocyanin, which are plant pigments classified in the group of flavonoids. These pigments are water-soluble and are found in the vacuoles of plant cells, where they can influence the color of flowers and fruits in various pH conditions.

Pelargondin, like other anthocyanins, is subject to pH changes, which means its color can vary from red to purple to blue depending on the acidity of the plant cell environment. This is a key feature of anthocyanins that contributes to their ability to provide a wide range of colors in plants. Knowing about pelargondin and related molecules is important in fields such as botany, horticulture, and food science, as these compounds are relevant not only for their roles in plant coloration but also for their potential health benefits as antioxidants in our diet.