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Bio 105 Cell Lab 3 Notes
- Course
- BIO 105
- Institution
- Gateway Community College
This is a comprehensive and detailed lab 3 notes on the cell. *Essential Study Material!!
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THE CELL LAB 3Name: Section:
PRE-LAB QUESTIONS – The Cell – Lab #3
1. Fill in the Venn diagram on Prokaryotic and Eukaryotic cells.
Answer: A) Prokaryotic cells:
i) Absence of membrane bound organelles.
ii) Absence of nucleus
iii) Found in bacteria, archaea
B) Eukaryotic cells:
i) Presence of membrane bound organelles.
ii) Presence of nucleus.
iii) Found in protists, plants, fungi and animals.
C) Similarities:
i) Both have a plasma membrane
ii) Both have ribosomes
iii) Both contain DNA
The Cell 21
, 2. Determine whether each organism is composed of Prokaryotic or Eukaryotic cell(s).
Organism: Prokaryotic cells or Eukaryotic cells
Fungi Eukaryotic
Bacteria Prokaryotic
Animals Eukaryotic
Archaea Prokaryotic
Protists Eukaryotic
Plants Eukaryotic
22 The Cell
, 3. What are the three physical shapes forms of bacteria?
Answer: Spherical (cocci), Rod (bacilli) and Spiral (spirilla)
4. How will gram-positive and gram-negative bacteria appear different when viewing under
the microscope?
Answer: When viewing under a microscope, gram-positive bacteria will appear a purple-violet
color while gram-negative bacteria will appear a red-pink color.
5. What is the major factor that determines if bacteria are gram-positive or gram-negative?
Answer: The major factor is the thickness of the cell wall. Gram-positive bacteria have a thick
peptidoglycan cell wall while the Gram-negative bacteria have thinner peptidoglycan cell wall.
6. Both animals and plants are composed of eukaryotic cells, however each organism’s cells
are slightly different. Fill in the Venn diagram on animal and plant cells.
The Cell 23
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