- Study guides, Class notes & Summaries

OCR A-LEVEL BIOLOGY Communication, Homeostasis and Energy Neuronal Communication 2

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19 pages

Written in 2022/2023

Grade A+

BrainBurstTESTBANKS

What are the resolution and magnification of a light microscope? correct answers R: 200nm M: x1500 what are the resolution and magnification of a TEM? correct answers R: 0.1nm M: x500,000 what are the resolution and magnification of an SEM? correct answers R: 0.1nm M: x100,000 what is the difference between magnification and resolution? correct answers Resolution is the ability to distinguish between two points that are close together, magnification is the degree to which the size of...

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9 pages

Written in 2022/2023

Grade A+

ProPerfomer

Questions And Answers

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26 pages

Written in 2022/2023

Grade A+

MAXIMUMSCORES

Questions And Answers

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26 pages

Written in 2022/2023

Grade A+

DYNAMICSCORES

why do specimens need to be thin when observing them under a light microscope? - to allow light to pass through Identify and explain the starch test - add iodine dissolved in potassium iodide solution to the sample - positive test = blue-black - negative test = orange-brown Why is the structure of the plasma membrane often referred to as the fluid mosaic model? - - the continuous bilayer is 'fluid' as the phospholipid molecules are constantly moving - protein molecules are scattered t...

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18 pages

Written in 2022/2023

LearnSphere

What is the cell theory? - ANSWER The cell is the basic unit of structure and function of all living organisms. Describe how to create a dry mount. - ANSWER Solids are cut into thin slices (sectioning). The specimen should be placed on a slide and covered with a cover slip (small specimens can be viewed in this way without sectioning). Describe how to create a wet mount. - ANSWER Specimens are put in a liquid (usually water or oil). A cover slip is placed at a 45° angle over the droplet a...

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7 pages

Written in 2022/2023

Grade A+

NursingTutor1