cell - 1. What is a cell? Cells are the structural and...

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1. What is a cell? Cells are the structural and functional units of living things. All living things are composed of cells. 2. Which of the following would be important in recycling nutrients in the environment? Why? A. Sperm B. Bacteria Bacteria – Bacteria and protozoa cause diseases in humans and animals and perform task such as recycling nutrients in the environment. 3. List three characteristics of cells. A. All cells are membrane enclosed and metabolically active. B. Each cell contains the hereditary material DNA which is capable of replication. C. All cells arise from preexisting cells. 4. What is the main difference between prokaryotic and eukaryotic cells? Prokaryotic cells are bacteria cells that lack an organized nucleus that’s surrounded by a nuclear membrane. Eukaryotic cells are found in a nucleus enclosed by a nuclear membrane. Prokaryotic cells lack membrane-bound organelles such as mitochondria. Energy-yielding reactions take place in prokaryotic cell membranes. Eukaryotic cells possess mitochondria that supplies energy to the cell. 5. In what type of cell would one find a single circular chromosome? Prokaryotic cell 6. How do prokaryotic and eukaryotic organisms differ in: A. Size: Prokaryotic 0.2 – 2.0 micrometers in diameter; Eukaryotic 10 – 100 micrometers in diameter B. Nuclear material: Prokaryotic no organized nucleus, single circular chromosome & no histones; Eukaryotic nucleus with nuclear membrane and nucleoli, DNA in nucleus & has histones C. Presence of membrane bound organelles such as mitochondria: Prokaryotic no membrane-bound organelles & divides by binary fission; Eukaryotic membrane – bound organelles (mitochondria) & divides by mitosis 7. Where do energy yielding reactions take place in: A. Bacteria: Energy-yielding reactions take place in prokaryotic cell membranes B. Animal cells: Eukaryotic cells possess mitochondria that supplies energy to the cell.
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This note was uploaded on 02/15/2012 for the course ENGL 1010 taught by Professor Stifler during the Spring '08 term at Chattanooga State.

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cell - 1. What is a cell? Cells are the structural and...

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