BTEC National Applied Science Biology 2025 With Correct Answers.

BTEC National Applied Science Biology
2025 With Correct Answers




Cell theory - correct answer Cell theory is the understanding that all living things are composed of cells and that
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cells are basic unit of life, all cells come from Pre existing cells
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1665 - correct answer Robert Hook described cells
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1674-1683 - correct answer Anton Van Leeuwenhoek observed first cell invented telescope
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1839 - correct answer Theodor Schwann developed cell theory
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1860 - correct answer Louis pasteur showed bacteria will only grow in sterile rich solutions in air
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Disproved theory of spontaneous generation of cells
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Eukaryotes - correct answer Have DNA in nucleus membrane bond (organelles)
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Prokaryotes - correct answer Have free DNA (not in nucleus)
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, No organelles (only ribosomes)
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Light Microscope - correct answer -Developed in 17th century
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-Magnify up to 2000x l l l




-able to magnify living specimen
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-focuses light to show the object l l l l l l




-Cheaper



Electron Microscope - correct answer -Developed in 1930
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-Magnifying 200000 l




-Sees substance of cells l l l




-Expensive

-Shorter wave lengths l l l




-higher magnification l l




-higher resolution l




TEM - correct answer Transmission electron microscope
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2D



SEM - correct answer Scanning electron microscope
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3D



Magnification - correct answer The degree to which the size of an image is larger than the image itself
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Resolution - correct answer It's the degree to which it's possible to distinguish two close objects together
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Calculating magnification - correct answer Eyepiece X objective magnification = overall magnification
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Cell magnification from image - correct answer Actual size = image size/Magnification
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