Question

Define simple carbohydrates and complex carbohydrates, and describe how the iodine test distinguishes between them. Which foods and products contain starchy materials?

What are the ingredients of powdered sugar and the artificial sweeteners, and how do the Benedict’s, solubility, and iodine tests correlate with these ingredients?

Answer 1

simple carbohydrate

example

sugar, honey ,fruit,fruit juice

Simple carbohydrates have a ‘simple’ molecular structure and are made up of 1-2 sugar molecules. The simplest form of carbohydrate is glucose. Simple sugars that are found in foods include sucrose (table sugar), fructose (found in fruit), and lactose (found in milk). Not all simple carbs are bad. Natural simple carbs in fruit and milk are perfectly healthy. Low-fat or non-fat dairy such as yoghurt, milk and cottage cheese are healthy food choices and rich sources of calcium

complex carbohydrate

example

rice,pasra,wholemeal

Complex carbohydrates are also made up of sugars, but the sugar molecules are strung together to form longer, more complex chains. Complex starchy carbohydrates include whole grains, peas and beans, which are rich in vitamins, minerals an fiber. The problem with complex starch carbs is that often they are refined

iodine react with complex carbohydrate but not with simple carbohydrate

simple carbohydrate give negative test

the food which contain starch

Sources of starch in the diet include rice, breads, potatoes, and corn,