Lab 2 cell structure and function

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Pre-Lab Questions:

“1. Identify the major similarities and differences between prokaryotic and eukaryotic cells. “

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“2. Where is the DNA housed in a prokaryotic cell? Where is it housed in a eukaryotic cell? “

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“3. Name three structures which provide support and protection in a eukaryotic cell. “

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Experiment 1: Cell Structure and Function

Post-Lab Questions

“1. Label each of the arrows in the following slide images: “

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Onion root tip, 1000x.

“2. What is the difference between the rough and smooth endoplasmic reticulum? “

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“3. Would an animal cell be able to survive without a mitochondria? Why or why not? “

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“4. What is the function of a lysosome? “

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Experiment 2: Exploring Cell Size

Record the cell radius and time to center of the cell in Table 2. Then, calculate the surface area, volume, and surface area:volume ratio (equations provided below). 

Table 2: Surface Area and Volume in Relation to Cell Size

Radius (µm) Surface Area (µm2) Volume (µm3) Surface Area:Volume Ratio Time to Center of the Cell (s)

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Post-Lab Questions

“1. Create a graph of the time to the center of the cell as a function of the surface area:volume ratio. 

 

2. How did the surface area affect the diffusion of the block? What about the volume? What about the surface area to volume ratio? Which of these had the greatest effect on the diffusion of the block? “

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“3. How does this experiment demonstrate the need for larger cells to divide? “

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