Biol 102 Lab2

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Your Full Name: Justin Davenport

UMUC Biology 102/103

Lab 2: The Chemistry of Life


* On your own and without assistance, complete this Lab 2 Answer Sheet electronically and submit it via the Assignments Folder by the date listed in the Course Schedule (under Syllabus).

* To conduct your laboratory exercises, use the Laboratory Manual located under Course Content. Read the introduction and the directions for each exercise/experiment carefully before completing the exercises/experiments and answering the questions.

* Save your Lab 2 Answer Sheet in the following format: LastName_Lab2 (e.g., Smith_Lab2).

* You should submit your document as a Word (.doc or .docx) or Rich Text Format (.rtf) file for best compatibility.

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?

a. DNA, RNA, and amino acids all contain Nitrogen. Without these components, there would be no 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.

b. Adenine and Thymine share 2 hydrogen bonds whereas Cytosine and Guanine share 3. This would make cytosine and guanine more stable under the increasing heat.

3. Which of the following is not an organic molecule; Methane (CH4), Fructose (C6H12O6), Rosane (C20H36), or Ammonia (NH3)? How do you know?

c. Ammonia, due to the lack of Carbon.



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 | No Egg to test | No Egg to test | I would assume yes |

2. Gelatin Solution | Yellow | Violet | Yes |

3. Glucose | Clear | Blue | No |

4. Water |...