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$20.00 Need help with research for this problem

From Biology: General-Biology
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Due on Oct. 18, 2008
Asked on Oct 12, 2008 at 9:00:22PM

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Assignment Type: Discussion Board Deliverable Length: 3-4 paragraphs
Points Possible: 70 Due Date: 10/19/2008 11:59:59 PM CT
There are two main types of cells: prokaryotic and eukaryotic.
1. Bacterial cells are prokaryotic. Select two structures of bacterial cells and briefly describe them; what do they look like, what are they composed of? Then, explain how these two structures allow bacterial cells to survive as unicellular organisms.
2. There are many examples of eukaryotic cells. Algae, Fungi, Plants, and Animals are all composed of eukaryotic cells. Some algae and fungi are unicellular organisms, but other algae and fungi, and all plants and animals are multicellular organisms that are composed of specialized eukaryotic cells that interact to support the life of the multicellular organism.
Choose either a plant or an animal cell. Choose two structures or organelles of the cell (not used in part one above.) Describe these two structures or organelles Â– what do they look like, what are they composed of? Then explain how these plant or animal cell structures or organelles function. How do these functions support activities of the plant or animal cell and enable survival of the multicellular plant or animal organism?
In your own words, please post a response to the Discussion Board and comment on other postings. You will be graded on the quality of your postings.

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AB143
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Posted on Oct 12, 2008 at 9:25:39PM

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Preview: ... s of binary fission. All protists are eukaryotes. It includes Algae, Fungi, Plants, and Animals. Algae are a typical eukaryotic plant cell which is mostly unicellular. The two important cell organelle of algae are – Mitochondria and Chloroplast. Mitochondria are centres of Krebs cycle or respiration. It is center of oxidation in which food are oxidized resulting into liberation of energy in the form of ATP. They are, ...

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Posted on Oct 13, 2008 at 2:38:15PM

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Preview: ... oscopic protein factories found in all cells, including bacteria. They are meant to translate the genetic code from the molecular language of nucleic acid to that of amino acids, which are the building blocks of proteins. Proteins are the molecules that perform all the functions of bacterial cells. Bacterial ribosomes are similar to those of eukaryotes, but are smaller and have a slightly different composition and molecular structure. Bacterial ribosomes are never bound to other organelles as they sometimes are (bound to the endoplasmic reticulum) in eukaryotes, but are free-standing structures distributed throughout the cytoplasm. There are differences between bacterial ribosomes and eukaryotic ribosomes. Thus, some antibiotics will inhibit the functioning of bacterial ribosomes, but not a eukaryotic ribosomes, thus killing bacteria but not the eukaryotic organisms they are infecting. The bacterial ribosomes are of 70s type. Each ribosome is made up of 50s and 30s subunits. Many ribosomes are held by a single mRNA to form a chain known as polyribosome or polysome. Their main function is to synthesize proteins. Thus, both capsule and ribosomes assist bacterial cells to function as un ...

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Posted on Oct 18, 2008 at 10:37:05PM

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Preview: ... y occurs in the leaves in the mesophyll cells and is rarely seen working in the stems. A normal bacterial cell is made up of protoplast having a naked nuclear material. This simple cell allows it to overpower as a unicellular mode of organization as it can’t handle complex organelles. “Protoplast in a plant or bacteria cell is the living material including the protoplasm and plasma membrane after the cell wall has been removed” (About, 2008). They are shaped in three different ways; spiral, rod-shaped, spiral, and spherical. • Absent organized nucleus: Because they don’t have a nuclear membrane m-RNA automatically turns into protein. There is no gap between transcription and translation because m-RNA is made u ...

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