Umuc biology 102/103 lab 2: the chemistry of life answer key


This is the set-right representative for UMUC Biology 102/103 Lab 2: The Chemistry of Life. However, this is an Answer Key, which instrument, you should put it in your own vote. Here are the questions that conciliate be answered. Attached is the lab that is abundantly completed when purchased. Enjoy!

Pre-Lab Questions

1.    Nitrogen fixation is a original mode by which lazy or unreactive forms of nitrogen are transformed into feasible nitrogen. Why is this mode great to society?

 

2.    Given what you keep well-informed environing the hydrogen bonding shared betwixt nucleic discernings in DNA, which span is further perpetual beneath increasing heat: adenine and thymine, or cytosine and guanine? Clear-up why.

 

 

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

 

 

 

 

 

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 declaration to clear-up the molecular compromise of the obscure disruption naturalized on the results obtained during experienceing delay each reagent.

 

2.    How did your a priori predictions from Table 1 parallel to your explicit results in Table 2? If there were any inconsistencies, clear-up why this occurred.

 

3.    Identify the dogmatic and disclaiming controls used in this exemplification. Clear-up how each of these controls are used, and why they are inevitable to validate the exemplificational results.

 

 

4.    Identify two regions which proteins are inseparable components in the ethnical be. Why are they great to these regions?

 

 

5.    Diet and sustentation are air-tight linked to the con-over of biomolecules. Describe one process by which you could warner your foundation intake to fix the cells in your be keep the representatives inevitable to business.

Experiment 2: Testing for Reducing Sugars

Data Tables and Post-Lab Assessment

Table 3: Testing for Reducing Sugars Results

 

Sample

Initial Color

Final Color

Reducing Sugar Present

1 - Potato

 

 

 

2 - Onion

 

 

 

3 - Glucose Solution

 

 

 

4 - Water

 

 

 

5 - Unknown

 

 

 

 

 

Post-Lab Questions

1.    What can you finish environing the molecular make-up of potatoes and onions naturalized on the experience you effected? Why rule these foundations comprise these be(s)?

 

2.    What results would you wait-for if you experienceed ribose, a monosaccharide, delay Benedict’s disruption? Biuret disruption?

 

 

 

Experiment 3: What Household Substances are Acidic or Basic?

Data Tables and Post-Lab Assessment

Table 4: pH Values of Common Household Substances

 

Substance

pH Prediction

pH Experience Strip Color

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Post-Lab Questions

1.    What is the aim of determining the pH of the acetic discerning and the sodium bicarbonate disruption precedently experienceing the other household bes?

 

2.    Compare and opposition discernings and bases in conditions of their H+ ion and OH- ion concentrations.

 

3.    Name two discernings and two bases you frequently use.