Cell Structure and Division - Eukaryotic Cells and Organelles 0.0 / 5 ? BiologyCellular processes and structureASAQA Created by: BriannaCulverCreated on: 20-10-16 20:08 How do you work out magnification? Image/Actual 1 of 26 What is a eukaryotic cell? A cell with a nucleus and membrane bound organelles, with no cell wall. 2 of 26 Why might the shape of ONE organelle may appear to be different? It can be seen transverse or longitudinal 3 of 26 What is the folded membrane of a mitochondrion called? cristae 4 of 26 What in a chloroplast contains chlorophyll? grana 5 of 26 What is the process called that secretes protein? exocytosis 6 of 26 What are prokaryotes? single celled organisms 7 of 26 What modifies proteins? Golgi apparatus 8 of 26 Name one difference between a prokaryotic and eukaryotic cell prokaryotic cells have a loop of DNA 9 of 26 Why is it best to use an optical microscope? Results in a colored image 10 of 26 why is it better to use an SEM microscope rather then a TEM microscope? It isn't as complex so doesn't take as long to prep 11 of 26 How do viruses reproduce? Inject their DNA into host cells. This cell then divides. 12 of 26 which part of the virus is made of fat? Lipid envelope 13 of 26 What is a protein coat called (virus)? capsid 14 of 26 What does resolution mean? How detailed an image is. 15 of 26 Cell fractionation by... ultracentrifugation 16 of 26 What is the aim of cell fractionation? To obtain undamaged cells of one type. 17 of 26 What is the first step of CF? The cell is cut into small pieces to increase surface area 18 of 26 What are the 3 conditions that the cell is placed in to during the second stage of CF? cold, isotonic, buffer 19 of 26 Why are the conditions cold for CF? Less kinetic energy, so enzymes don't function. 20 of 26 Why do the conditions for CF have to be isotonic? Prevents osmosis, so there is no damage to cells. 21 of 26 Why does buffer have to be added during CF? It is a chemical that resists pH change. Enzymes do NOT denature. 22 of 26 What is the 3rd stage of CF? Homogenised and filtered. 23 of 26 What are the cells spun in during CF? And what are the conditions for the first time? A centrifuge. Short time, low speed. 24 of 26 What is the liquid substance after CF? What are the dense organelles called? Supernatant. Pellet. 25 of 26 What is the role of the nucleoli? Make ribosomes 26 of 26
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