Cells contain many organic molecules. These molecules are essential to life. Many of them are acquired from the food we eat. In this lab you will study carbohydrates, proteins, fats, vitamins, and other nutrients that provide your body with energy and provide the raw materials necessary to carry on life activities. These compounds are present in the plants and animals you use as food. In this lab, you will learn how to test for each of these organic molecules in food using chemical indicators. A chemical indicator is any substance that gives a visible sign, usually by a color change, of the presence or absence of a concentration of a chemical species. An indicator can be used to test the presence of the four biomolecules in food. You will use the following three chemical indicatorsBenedict's solution: tests for sugar, carbohydratesBiuret solution: tests for proteinLugol's Iodine solution: tests for starch, complex carbohydratesAnswer the questions 1-6 before starting the virtual lab1. What are Biomolecules?2. How are monomers and polymers different?3. What are the monomers for each of these macromolecules?a) Carbohydrates:b) Nucleic Acids:c) Proteins:d) Lipids (fats):4. Circle any of the following compounds that would be classified as carbohydrates. (use the internet for help)a) Amino acidsb) Fructosec) Maltosed) Glucosee) Starchf) Hemoglobing) Lactose6. Which types of biomolecules do you predict that you will find in the food items below? Lab: Testing of Known Substances: Go to the Organic Molecules website for this part!http://www. occc. edu/biologylabs/Documents/Organic%2 0Compounds/Organic%20Compounds. htmYou will learn how to test for each of these organic molecules by clicking on the boxes shown below. Complete each of the tests for carbohydrates and proteins. Write your results in the data table below. Part I: Testing of Carbohydrates, Proteins, and Fats (Lipids):SubstanceChemical IndicatorDescribe Color ChangeProteinBiuret SolutionSimple SugarBenedict's SolutionStarchLugol's Iodine7. What substance was used as the control and why?8. What was the function of each of the chemical indicators used?

question#1

ans:

cell is the basic unit of organization of all living things. cells are often called the building block of life and it is the smallest unit of life. the study of cell is called cell biology. cell consists of cytoplasm enclosed within membrane, which contain bio-molecules such as proteins and nucleic acid.

two third of cell is water, which means that two-third of your whole body is water. the rest is the mixture of molecules, mainly proteins, lipids and carbohydrates.

question#2

ans:

organ:

an organ is a group of tissues specialized to form a functional unit. an example is the heart in animals.

organ system:

an organ system is a group of several organs whose functions are synchronized to release an effective action in a living organism. an example is digestive system.

question#3

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#4

different systems perform different function at tissue level. for example, the respiratory system facilitates breathing. in the alveoli tissue of the lungs, the exchange of oxygen and carbon dioxide molecules between the air and the bloodstream occurs by passive transport, so that oxygen is taken in and carbon dioxide and water are removed. different systems of the body carry out different functions. for example, your digestive system is responsible for taking in and processing food, while your respiratory system—working with your circulatory system is responsible for taking up oxygen and getting rid of carbon dioxide.

question#5

our body works because of the interactions that happen between organs and organ systems.  

for example:  

the heart to regulate blood flow throughout the body. the blood carries oxygen and nutrients to the cells and carries carbon dioxide and waste away from the cells. body systems work together in maintaining a constant internal environment. when this balance is disrupted, the body systems may not function properly, and human health can suffer.   you start to feel bad.

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.

answer(1) tab per dose.;