INSTRUCTIONS:
· 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?
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
SampleInitial ColorFinal ColorIs Protein Present?1. Albumin Solution2. Gelatin Solution3. Glucose4. Water5. UnknownSampleInitial ColorFinal ColorIs Protein Present?1. Albumin Solution2. Gelatin Solution3. Glucose4. Water5. UnknownTable 2: Testing for Proteins Results
Take a picture of your results. Include a note with your name and date on an index card in the picture. REPLACE picture here:
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.
2. How did your a priori predictions from Table 1 compare to your actual results in Table 2? If there were any inconsistencies, explain why this occurred.
3. Identify the positive and negative controls used in this experiment. Explain how each of these controls are used, and why they are necessary to validate the experimental results.
4. Identify two regions which proteins are vital components in the human body. Why are they important to these regions?
5. Diet and nutrition are closely linked to the study of biomolecules. Describe one method by which you could monitor your food intake to ensure the cells in your body have the materials necessary to function.
Experiment 2: Testing for Reducing Sugars
Data Tables and Post-Lab Assessment
Table 3: Testing for Reducing Sugars Results
SampleInitial ColorFinal ColorReducing Sugar Present1 – Potato2 – Onion3 – Glucose Solution4 – Water5 – UnknownTake a picture of your results. Include a note with your name and date on an index card in the picture. REPLACE picture here:
Post-Lab Questions
1. What can you conclude about the molecular make-up of potatoes and onions based on the two tests you performed? Why might these foods contain these substance(s)?
2. What results would you expect if you tested ribose, a monosaccharide, with Benedict’s solution? Biuret solution?
Experiment 3: What Household Substances are Acidic or Basic?
Data Tables and Post-Lab Assessment
Table 4: pH Values of Common Household Substances
SubstancepH PredictionTest Strip Color and pHAcetic Acid (Vinegar)Sodium Bicarbonate Solution (Baking Soda)Take a picture of your results. Include a note with your name and date on an index card in the picture. REPLACE picture here:
Post-Lab Questions
1. What is the purpose of determining the pH of the acetic acid and the sodium bicarbonate solution before testing the other household substances?
2. Compare and contrast acids and bases in terms of their H+ ion and OH- ion concentrations.
3. Name two acids and two bases you often use.
“WE’VE HAD A GOOD SUCCESS RATE ON THIS ASSIGNMENT. PLACE THIS ORDER OR A SIMILAR ORDER WITH HOMEWORK AIDER AND GET AN AMAZING DISCOUNT”
The post UMUC Biology 102/103 Lab 2: The Chemistry of Life appeared first on Homeworkaider.
What Students Are Saying About Us
.......... Customer ID: 12*** | Rating: ⭐⭐⭐⭐⭐"Honestly, I was afraid to send my paper to you, but you proved you are a trustworthy service. My essay was done in less than a day, and I received a brilliant piece. I didn’t even believe it was my essay at first 🙂 Great job, thank you!"
.......... Customer ID: 11***| Rating: ⭐⭐⭐⭐⭐
"This company is the best there is. They saved me so many times, I cannot even keep count. Now I recommend it to all my friends, and none of them have complained about it. The writers here are excellent."
"Order a custom Paper on Similar Assignment at essayfount.com! No Plagiarism! Enjoy 20% Discount!"
