Homework #1 1. Go outside for a hike/walk/run and think about t...

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Homework #1

1. Go outside for a hike/walk/run and think about the microbes all around you. When you get home, look up 2 specific microbes that may have been in the soil, water or air. Describe some of their characteristics and what kingdom and domain they belong to.

2. Make a list of the 5 kingdoms we went over in lecture. Please state whether each kingdom is made up of prokaryotic or eukaryotic cells, and if those cells are multicellular, unicellular or both. To familiarize yourself with free-living versus parasitic organisms, please look up on the internet or in your textbook an example of a free-living (non-pathogenic) organism and a parasitic (pathogenic) organism from the Fungi and Protista Kingdoms.

3. Please describe how the debate over spontaneous generation of life was settled. In your description, include the main experiments that were conducted, what the results were and what theory they supported.

4. Please draw a typical bacterial cell. (Draw it, don’t copy and paste a picture) List the main structures of the cell and their functions. (at least 6) Then highlight where you would find the four biomolecules of life in the bacterial cell. For example, what structures would they be in, if in a structure, or what area of the cell. Then describe the function of those biomolecules in the cell.

5. In a eukaryotic cell there are membrane bound organelles. Please list at least 5 of these and their functions.

6. Bacteria and animal cells can both move. What do animal cells use to move with and what do bacterial cells use? Are they different structurally?

7. In cellular respiration, a typical bacterial cell produces 38 ATP. How many ATP molecules are produced during glycolysis, Krebs cycle and the Electron transport chain? What is chemiosmosis and why is most of the ATP produced during this process as compared to the ATP produced during glycolysis and the Krebs cycle?

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Spontaneous generation was an obsolete thought for the generation of living organisms without descent from the similar organism. Spontaneous generation is the belief that life can be formed from nonliving things. The idea behind the spontaneous generation is that the life such as flea arises from some nonliving substances. The theory of spontaneous generation had been proposed by Aristotle whereas the Louis Pasteur had discarded it during the 19th Century. Pasteur extended the work done by Francesco Redi. He first boiled the raw meat broth inside a swan neck flask having a long curved neck. The ideas behind using the long neck were that it prevents dust particles from going up the broth, only allowing the free air. This broth was then boiled to sterilize it. There was no growth of any living flea or maggots for certain time. Although the flask remained open to the air, nothing grew in the flask. As soon the flask was opened so that the particles could reach to the...

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