Pectin is used to cause the 'jelly' appearance. Everything else is for flavoring and sweetness. Sugar, or artificial sweeteners like saccharine are used. Grapes, apples, strawberries or their juices are used for the flavors. There are artificial flavorings that can also be used to intensify the flavor.
A small sour berry used for jams and jellies is a redcurrant or simply currant.
Pectin is a preservitive, commonly used when making jams and jellies.
Sea Jellies do NOT release chemicals. They sting stupid people who only THINK they release chemicals, confusing them with Algal Blooms, which are massive population explosions of phytoplankton which release toxic chemicals into the water. Normally, jellies sting either in defense or to catch prey.
Can knox gelatine be used in making jams and jellies instead of pectin?
Certo is a brand of fruit pectin that is used in making jellies and jams to produce a more gelatinous set - so it isn't runny.
The unusual fruit called medlars is often used in making jellies and jams, but there's also a medlars cheese as well as a wine.
yes
Chemicals are used for several purposes, they are used in making drugs, cosmetics, paints, and a lot more substances that we use in our everyday life.
Certo is a brand of fruit pectin that is used in making jellies and jams to produce a more gelatinous set - so it isn't runny.
I'm not sure about calling them chemicals, but in addition to the fruit, lots of sugar and sometimes lemon juice are used.
Sur-Gel (or Sure-Gel) is fruit pectin for making jams & jellies
SiO2+2C--->Si2CO