if you mean wine, then they get their flavor from grapes
Because grape has flavor rice has no
Grapes are typically acidic, with a pH ranging from 2.9 to 3.3. The acidity of grapes can contribute to their tartness and affect their flavor profile.
Table grapes and raisin grapes are grown in dry hot areas, because that gives the highest yield and quality. A cooler climate produces the highest quality wine grapes, where high yield is not the top priority. Sometimes the stress of a rocky soil will improve the flavor of wine grapes. Each grape variety requires a slightly different combination of soil and climate to produce the desired flavor and yield.
The artificial grape flavor is based on a compound called methyl anthranilate, which is not found in high concentrations in actual grapes. This compound gives off a sweet, floral aroma that is commonly associated with grape flavoring. Real grapes have a more complex flavor profile, influenced by various compounds such as sugars, acids, and esters, which give them their unique taste and smell.
Masami Kataoka has written: 'Machigaidarake no shinbun hodo: Kagirinaki kyoho no samazama'
The white hairy mold that grows on grapes is typically botrytis cinerea, also known as noble rot. It is a beneficial fungus that can enhance the flavor and sweetness of the grapes in certain winemaking processes, such as for the production of sweet dessert wines like Sauternes.
When red grapes are added to acid, the acid helps extract the color and flavor compounds in the grape skins, resulting in a more vibrant red color and intense flavor in the juice or wine produced. The acid can also influence the fermentation process and final taste of the product.
A lemon is a specific type of fruit. A fruity flavor could suggest several different fruits, possibly grapes, apples, pineapple, etc. A lemony flavor tastes specifically like lemon.
Raisins come from grapes. They are made by drying grapes, either in the sun or through an artificial drying process. The drying process concentrates the sugars in the grapes, giving raisins their sweet flavor. Different types of grapes produce different varieties of raisins, such as Thompson Seedless for golden raisins or Zante currants for small, dark raisins.
The answer is that grape-flavored things DO taste like grapes, but not the kind of grapes found in most supermarkets. Thompson seedless, flame, champagne, and other kinds of grapes are more closely related to grapes for making wine. The quintessential grape flavor of grape candy, popsicles, and even grape juice concentrate is derived from Concord grapes. These do not travel or store well and so are rarely found in supermarkets or even farmers markets. Concord grapes are a real treat with an amazingly intense purple grape flavor and taste even better than grape-flavored items. Cherry has a similar issue: cherry-flavored items do not taste like commercially available sweet cherries (Bing, Rainier, etc.) The quintessential cherry flavor of cherry soda or even cherry pie comes from sour cherries, such as Montmorency. These are not widely available because they do not store or travel well. Sour cherries, like Concord grapes, have an incredibly intense flavor, but most people think they are too tart for eating straight so they end up in juice or pie or flavoring for other items.
Zinfandel is a variety of red grapes grown mostly in California used for wine making. Zinfandel wines can be red or blush. They have a fruity flavor.