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UMUC Biology 102/103
Lab3:Cell Structure and Function
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without assistance, complete thisLab 3Answer Sheet
electronically and submit it via theAssignments Folder by the date listed in theCourse Schedule (underSyllabus).
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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.
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three major similarities and differences between prokaryotic and eukaryotic
is the DNA housed in a prokaryotic cell? Where is it housed in a eukaryotic
three structures which provide support and protection in a eukaryotic cell.
Experiment 1: Cell Structure and Function
each of the arrows in the following slide image:
is the difference between the rough and smooth endoplasmic reticulum?
an animal cell be able to survive without mitochondria? Why or why not?
could you determine about a specimen if you observed a slide image showing the
specimen with a cell wall, but no nucleus or mitochondria?
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.
2: Osmosis – Direction and Concentration Gradients
Data Tables and Post-Lab Assessment
Table 3: Sucrose Concentration vs. Tubing Permeability
Table 3: Sucrose
Concentration vs. Tubing Permeability
Sucrose in Bag
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.
tubing increased the most in volume? Explain why this happened.
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?
would happen if the tubing with the yellow band was placed in a beaker of
are excess salts that accumulate in cells transferred to the blood stream so
they can be removed from the body?
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.
is this experiment similar to the way a cell membrane works in the body? How is
it different? Be specific with your response.