Lab 4

• Four types of Macromolecules

  Carbohydrates, lipids, proteins, nucleic acid
• Benedict solution is a chemical indicator for simple sugars(carbohydrates) such as glucose. negative test is blue. D1 water is an aqua blue and the glucose solution turns orange(positive control)
• Iodine solution is a chemical indicator for complex carbohydrates like starch. Negative test is Yellow/orange. Blue is positive
• Lipids


  Composed of long hydrocarbon chains. Large amounts of energy stored in bonds.
• Sudan IV is an indicator for hydrophobic molecules such as fats(lipids) negative test is pink
• Biuret solution is a protein. and the negative test is light blue positive is a dark purple
• Carbohydrates

  Fuel for cells. Found in simple sugars and complex sugars. Indicators are benedicts and iodine solution
• A carbohydrate is present in milk
• Starch is present in potatoes
• Tuna is a protein
• Mystery smoothie has to be nucleic acid
• Proteins responsible for structure of organs and muscles. can also be use as fuel
• Positive control is an experiment whose results is already known to be positive.
• A negative control. Can be done with a sample that should normal yield a negative result
• positive controls validate that the experiment is capable of detecting the desired effect, while negative controls help rule out alternative explanations for observed results.
• Starch test

  tuna and potatoes Do have starch is a daek blue(positive). While Mike doesn’t and is orange(negative)
• Sudan test:

  Potatoes milk oil water mixed in well it was positive. the tuna was the negative
• Benedict test

  All of them have glucose
• Bluret test

  Tuna was positive, milk& unknown had a slight change in color some protein. Potatoes was negative