1) The positive results of lab testing for the :
Lipids is that the food materials that cause a greasy stain and dry off after a period of time its considered positive if there is no remaining stain
Starch testing was analyzed to be positive because by looking at the colour change, if an object were to change to a dark black colour by reacting with the small drops of iodine indicates to the food sample that complex polymer molecules of starch are there in that particulsr food substance. For on the Simple Sugars Testing, by adding required amount of Chemical reagent Bennedict's reagent if the colour change of the food were to change to a yellowish brown indicated that was a Simple Sugar.
2) The basic components and or building blocks of Starch Molecules are A string or molecular chain of Glucose attached to the chain.
3) The scientific reason of why there had only been 2 positive results of test tube colour change to yellow and orange and the remaining 4 test tubes remained blue in the heated amount of beaker on the hotplate at certain temperature and why the reaction hadn't occured simultaneously with the previous positive test tube results is due to the complexity of the molecular substance including the complexity of the carbohydrate. The 1st two test tubes had weaker or less bonds of carbohydrates for reaction to occur with required heat and was easier to break.
4) The food journey of a piece of food, a piece of pancake. The first stage of digestion process of experiment would start with the Ingestion at the mouth, including both the mechanical or physical breaking down the food into smaller shapes of food pieces and the 2nd part of ingestion the chemical digestion the accessory organs, salivary glands produce a specific enzyme salivary amylase which further reacts starch molecules to water producing maltose. After swallowing the small end part of food the Bolus, travels through the muscular stretchable tube the esophagus through the expand and contract of muscles involving peristaltic contractions. Goes through the Cardiac Sphincter .Then it reaches the stomach which peristalsis occurs there as well and due to the churning of the stomach
causes it to be turned to Chyme. As the food goes past the Pyloric Sphincter, the chyme enters through the duodenum where the other Acessory Organs, the Pancreas releases Insulin to control levels of glucose in body. The liver which empulsifies fats. As water is absorbed in feces going through the large intestine goes out through the anus after few minutes or time at the rectum. THus the journey of a small fatty simple sugar and starched food.
