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Biology Chapter 3
Cell
| Question | Answer |
|---|---|
| What contributions did Hooke and Leevwenhoek make to biology? | In 1665 Hooke observed and named the first cell. In 1675 Leevwenhoek found the first microorganism. |
| Describe and compare magnification and resolution. | Magnification is the act of making something appear bigger resolution is the quality of that image. The both have to do with the enhancement and enlargement of an image. |
| What is the five types of microscopes? | Compound light, electron, scanning electron, transmission electron, and scanning tunneling microscopes. |
| Describe a compound light microscope. | A compound light microscope can magnify up to 2000x. A light goes through two glass slides. It has low magnification but can be used for living things. |
| What is an electron microscope? | They are very accurate and can magnify up to 200,000x. However, it uses a vacuum so living cells can not be viewed. |
| What is an Transmittion Electron Microscope? | It works by directing electron beams at a thin slice of specimine stained with metal ions. The heavily stained areas absorb the electrons creating a image with very fine detain of the inside. |
| What is a scanning electron microscope? | Electron beams are aimed at a specimine coated with a layer of metal ions. The electrons bounce of certain areas creating a explicit 3D image. |
| What is a scanning tunnelling microscope? | Can view as little as the fine detail of an atom. Needle like probes measure the voltage cause by electrons on a specimen. |
| Why is the size of a cell important? | It has a higher surface area to volume ration making it more efficient. All organisms no matter how big have the same basic size of cells. |
| 3 cell theories. | All organisms have at least one cell. Cells are the basic structure and function of all organisms. All cells are made from existing cells. |
| what are prokaryotic cells. | prokaryotic cells are the oldest kind of cell. the have no nucleus or internal compartments to carry out functions. they only have a very small amount of DNA in them. The are more commonly known as single cell organisms or bacteria. |
| what are eularyotic cells. | The have a nucleus that houses the majority of the DNA in a cell. They have many internal compartment with individual purposes. |
| Describe the role of the mitochondria in the eukaryotic cells. | This is where the chemical reactions that produce ATP happens. It produces the majority of the energy needed for the cell. |
Created by:
KatyMae
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