Organic molecules are the cornerstone of life on Earth Assignment | Online Assignments
Organic molecules are the cornerstone of life on Earth. This lab explores how to identify the most important organic molecules for life. Download the assignment linked below. Lab 2 Organic Molecules.docPreview the document Please read Section (2.5) in your textbook. http://www.occc.edu/biologylabs/Documents/Organic%20Compounds/Organic%20Compounds.htm (Links to an external site.) How to document for this lab Upload completed assignment by the due date.
Lab 2 Organic Molecules Lab Activity
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Use your text book, notes, and any of the websites from the lab assignment page in canvas to help you to answer the pre lab questions.
Pre Lab Questions
Matching: Each choice may be used once, more than once, or not at all. Choose ONLY ONE answer for each question.
| Mixes with water | Olive oil | Amphipathic | All natural compounds |
| Amino Acids | Saturated | Single bonds | Carbon, Hydrogen and Oxygen |
| Single sugar | Glucose | Double bonds | Peptide bonds |
| Cannot mix with water | Monounsaturated | Triple bonds | Paper |
| Many sugar molecules bound together | Starch | Carbon | Soap |
| Salt (NaCl) | Phospholipids | Carbon and Hydrogen | Sand |
| Monosaccharide | Polysaccharide | Polyunsaturated | Dehydrogenated |
| Complete Word or Phrase |
| 1. A monosaccharide is defined as |
| 2. A polysaccharide is defined as |
| 3. is an example of a monosaccharide |
| 4. is an example of a polysaccharide |
| 5. are the building blocks of proteins |
| 6. Hydrophobic means something is |
| 7. is an example of a hydrophobic compound |
| 8. Hydrophillic means something is |
| 9. is an example of a hydrophilic compound |
| 10. Lipids with multiple double bonds are classified as ____________________. |
| 11. Fats that contain all single bonds between carbon atoms are classified as ___________________. |
| 12. Organic molecules are defined as containing . |
| 13. compounds are both hydrophobic AND
hydrophillic. |
Be sure to watch the lab How To video on the canvas assignment page. Then use the link on the that same assignment page to access the online lab.
You will see the following at the bottom of the first page of the website. Work through each one of these and answer the questions in this document.
Carbohydrates |
Proteins |
Fats |
Foods |
- In this lab what color is the positive result for the benedicts test?
- What did you use to guarantee a positive result for the benedicts test?
- What reagent is used to identify starch?
- What reagent is used to identify proteins?
- What is the color change indicating the presence of protein?
- Is Sudan IV hydrophobic or hydrophilic? Explain your answer with observations from the lab exercise.
- Fill in the chart below. Designate positive or negative by placing a + or – in each box for each test done on each food substance.
| Food | Sugar | Starch | Protein | Fat |
| Potato | ||||
| Orange Juice | ||||
| Almonds | ||||
| Eggs | ||||
| Salmon | ||||
| Milk | ||||
| Canned Tuna** | ||||
| Butter** |
**Use your knowledge of these products to predict the results in these tests.
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