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Question;Your Full;Name: TIMOTHY D. HOOD;UMUC Biology 102/103;Lab 3: Cell Structure and Function;INSTRUCTIONS;?;On your own and without assistance, complete;thisLab;3Answer Sheet electronically;and submit it via theAssignments;Folder by the date listed in theCourse Schedule (underSyllabus).;?;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 3Answer Sheet in the;following format: LastName_Lab3 (e.g.;Smith_Lab3).;?;You should submit your document as a Word (.doc or.docx) or;Rich Text Format (.rtf) file for best compatibility.;Pre-Lab Questions;1.;Identify;the major similarities and differences between prokaryotic and eukaryotic;cells.;2.;Where;is the DNA housed in a prokaryotic cell? Where is it housed in a eukaryotic;cell?;3. Identify three structures;which provide support and protection in a eukaryotic cell.;Experiment 1: Cell Structure and Function;Post-Lab Questions;1.;Label;each of the arrows in the following slide image;2.;What;is the difference between the rough and smooth endoplasmic reticulum?;3.;Would;an animal cell be able to survive without a mitochondria? Why or why not?;4.;What;could you determine about a specimen if you observed a slide image showing the;specimen with a cell wall, but no nucleus or mitochondria?;5.;Hypothesize;why parts of a plant, such as the leaves, are green, but other parts, such as;the roots, are not. Use scientific reasoning to support your hypothesis.;Experiment 2: Osmosis - Direction and;Concentration Gradients;Data Tables and Post-Lab Assessment;Table 3: Sucrose Concentration vs.;Tubing Permeability;Band Color;Sucrose %;Initial Volume (mL);Final Volume (mL);Net Displacement (mL);Yellow;Red;Blue;Green;Hypothesis;Post-Lab Questions;1. For;each of the tubing pieces, identify whether the solution inside was hypotonic;hypertonic, or isotonic in comparison to the beaker solution in which it was;placed.;2. Which;tubing increased the most in volume? Explain why this happened.;3. What;do the results of this experiment this tell you about the relative tonicity;between the contents of the tubing and the solution in the beaker?;4. What;would happen if the tubing with the yellow band was placed in a beaker of;distilled water?;5. How;are excess salts that accumulate in cells transferred to the blood stream so;they can be removed from the body? Be sure to explain how this process works in;terms of tonicity..;6. If;you wanted water to flow out of a tubing piece filled with a 50% solution, what;would the minimum concentration of the beaker solution need to be?Explain;your answer using scientific evidence.;7. How;is this experiment similar to the way a cell membrane works in the body? How is;it different? Be specific with your response.


Paper#62757 | Written in 18-Jul-2015

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