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BIO 353 Study Guide exam 1 with Complete Solutions

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BIO 353 Study Guide exam 1 with Complete Solutions The cell - Ans:-The basic unit of structure and function in living things What are the major Organelles/ structures of a basic eukaryotic cell? - Ans:-nucleus nucleolus ribosomes smooth ER rough ER mitochondria What are the 3 major discipl...

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  • October 23, 2024
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  • 2024/2025
  • Exam (elaborations)
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  • BIO 353
  • BIO 353
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BIO 353 Study Guide exam 1 with
Complete Solutions


The cell - Ans:✔✔-The basic unit of structure and function in living things


What are the major Organelles/ structures of a basic eukaryotic cell? - Ans:✔✔-nucleus


nucleolus


ribosomes


smooth ER


rough ER


mitochondria


What are the 3 major disciplines involved with studying biology? - Ans:✔✔-bioimaging


biochemistry


mol. biology/genetics




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What is light microscopy? - Ans:✔✔-visible light passes through a series of lenses to produce a magnified

image


What is the resolution limit of the light microscope? - Ans:✔✔-.2 nm


Define resolution - Ans:✔✔-Describes the degree of clarity, detail, and sharpness of an image


Define magnification - Ans:✔✔-the ratio of an object's image size to its real size


what is one of the major advantages of the basic light microscope? - Ans:✔✔-ability to image LIVE cells


State of cells when using amplitude contrast - Ans:✔✔-fixed/dead


Describe amplitude contrast - Ans:✔✔-a form of contrast generated by the absorption of selective wave

lengths from the visible light spectrum


Describe phase contrast microscopy - Ans:✔✔-dependent on light refraction


contrast formed b/c different parts have different densities


State of cells when using phase contrast? - Ans:✔✔-living


epifluorescence microscopy - Ans:✔✔-detection of specific molecules/ions/organelles that are MADE

fluorescent by coupling them to a flourochrome marker


indirect immunofluorescence - Ans:✔✔-i. cells/tissues fixed


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ii. exposed to primary antibody, antibody binds to specific protein (ie antigen)


iii. exposed to secondary antibody that is coupled to a flourochrome marker


What is GFP and how is it coupled to the proteins in different cellular structures (direct method)? -

Ans:✔✔-Green Fluorescent Protein binds the flourescent sntibody to the corresponding antigen on the

target protein


Whats the advantage of using GFP? - Ans:✔✔-cells are ALIVE


What are vital fluorescent dyes (direct method)? - Ans:✔✔-harmless dyes used to stain living tissue for

observation


confocal microscopy - Ans:✔✔-a light microscope that uses fluorescent stains and laser to make two-

and three-dimensional images


Advantages of confocal microscopy - Ans:✔✔-increased clarity of images and resolution


What is electron microscopy? - Ans:✔✔-technique used for obtaining high resolution images of

specimens


transmission electron microscope - Ans:✔✔-used to study the internal structure of cells


Advantage of electron microscope - Ans:✔✔-shorter wavelength of electron beam= increased resolution

and magnification


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