Required Resources
Read/review the following resources for this activity:
- Textbook: Chapters 4, 5, 6
- Weekly Concepts
Initial Post Instructions
First, let’s differentiate all the detailed vocabulary about all these cells we learned this week. When looking under microscope what structural differences would you see between two types of cells.
Now choose ONE cellular component (e.g. a part of a cell) that is found only in bacteria. Discuss what its role is.
-OR-
Choose ONE cellular component that is only found in eukaryotes. Discuss what its role is.
For your second post, comment on a peer’s post. If they chose a prokaryotic cellular structure, please share whether or not you think that structure would be a good target for antibiotics and why?
If your peer chose an eukaryotic cellular target, I want you to think about evolution and the endosymbiotic theory. The endosymbiotic theory states that mitochondria and chloroplasts were initially free living organisms that entered larger cells through endocytosis, but were not digested. What is the evidence, and are you convinced? Why or why not?
Make sure to post at least two high quality posts. Your instructor will open new topics of discussion throughout the week.
Follow-Up Post Instructions
Respond to at least one peer or your instructor. Further the dialogue by providing more information and clarification.
Writing Requirements
- Minimum of 2 posts (1 initial & 1 follow-up)
- Minimum of 2 sources cited (assigned readings/online lessons and an outside source)
- APA format for in-text citations and list of references
Answer1:
Hello Professor Brener and class,
First, let’s differentiate all the detailed vocabulary about all these cells we learned this week. When looking under a microscope what structural differences would you see between two types of cells?
Now choose ONE cellular component (e.g. a part of a cell) that is found only in bacteria. Discuss what its role is
Answer: The major difference between the eukaryote and prokaryote cells is that eukaryotic cells have cell membrane-bounded organelles and prokaryotes have organelles without any membrane. The cellular component I have chosen the ribosomes. The majority of microorganisms are single-celled (all bacteria and archaea and some eukaryotes) (Cowan, 2017).
According to the source “British Society for Cell Biology” (n.d.), “ribosomes help to produce proteins. Ribosomes are found in prokaryotic (bacteria) and eukaryotic cells Those found in prokaryotes are usually smaller than those found in eukaryotes because bacterial and archaeal cells are about 10 times smaller than eukaryotic cells (Cowan, 2017). Ribosomes in mitochondria and chloroplasts are similar in size to those in bacteria. There are about 10 billion protein molecules in a mammalian cell and they are produced by ribosomes. A quickly growing mammalian cell can carry approximately 10 million ribosomes., for example, a single cell of E. Coli can hold approximately 20,000 ribosomes, and this explains about 25% of the total cell mass.”
Answer2:
Hello Class and Professor,
First, let’s differentiate all the detailed vocabulary about all these cells we learned this week. When looking under microscope what structural differences would you see between two types of cells.
Now choose ONE cellular component (e.g. a part of a cell) that is found only in bacteria. Discuss what its role is.
Answer: There are many types of differences between the eukaryote and prokaryote cells and one difference I would like to point out is the Flagella. Flagella is a structure that exists on both eukaryotic and prokaryotic cells and serves the purpose of moving the cell through the fluid environment in which that cell is found in. A bacterial flagellum has 3 basic parts: a filament, a hook, and a basal body. The Eukaryotic flagella are much different from the Prokaryote flagella. The eukaryotic flagellum is thicker (by a factor of 10), structurally more complex, and covered by an extension of the cell membrane. A single flagellum is a long, sheathed cylinder containing regularly spaced, hollow tubules—microtubules—that extend along its entire length( Cowan, 2017). The Prokaryote flagella on the other hand, are much smaller, narrower, and a covering membranous sheath is absent. Prokaryote flagella is made of a globular protein called flagellin that creates a rigin, hollow cylinder and uses the movement of hydrogen ions across the membrane down their electrochemical gradient to move the flagellin in a counterclockwise/clockwise fashion.
