This is the correct material for UMUC Biology 102/103 Lab 2: The Chemistry of Life. However, this is an Answer Key, which means, you should put it in your own words. Here are the questions that will be answered. Attached is the lab that is fully completed when purchased. Enjoy!
Pre-Lab Questions
1. Nitrogen fixation is a natural process by which inert or unreactive forms of nitrogen are transformed into usable nitrogen. Why is this process important to life?
2. Given what you have learned about the hydrogen bonding shared between nucleic acids in DNA, which pair is more stable under increasing heat: adenine and thymine, or cytosine and guanine? Explain why.
3. Which of the following is not an organic molecule; Methane (CH4), Fructose(C6H12O6), Rosane (C20H36), or Ammonia (NH3)? How do you know?
Experiment 1: Testing for Proteins
Data Tables and Post-Lab Assessment
Table 1: A Priori Predictions
| Sample | Initial Color | Final Color | Is Protein Present? |
| 1. Albumin Solution | |||
| 2. Gelatin Solution | |||
| 3. Glucose | |||
| 4. Water | |||
| 5. Unknown |
| Sample | Initial Color | Final Color | Is Protein Present? |
| 1. Albumin Solution | |||
| 2. Gelatin Solution | |||
| 3. Glucose | |||
| 4. Water | |||
| 5. Unknown |
Table 2: Testing for Proteins Results
Post-Lab Questions
1. Write a statement to explain the molecular composition of the unknown solution based on the results obtained during testing with each reagent.
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