1. What happens to a animal cell in high and low Ψ ?
- Lysis and Crentation
- Turgid and Plasmolysed
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2. Which of these is not correct?
- Telophase - Chromatids have reached the poles, nuclear envelope reforms and chromosomes begin to unravel
- Prophase - Supercoiling of chromosomes, nuclear envelope breakdown, spindle forms
- Cytokinesis - Cytoplasm spilts to make two genetically different cells
- Anaphase- Centromeres split and the chromatids move to the poles of the cell
- Metaphase -Chromosomes line up at equator of cell, with the spindle attached at the centromere
3. What is cell signalling not used for?
- Movement of molecules from an area of high concentration to low
- Hormones will attach to a receptor of target cells and internal response is triggered
- Drugs like beta- blockers or aspirin will bind to certain receptors on cells
- Some drugs that treat depression like diazepan mimic a neurotransmitter
4. What are glycoprotiens used for?
- Channel proteins allow larger molecules and ions through, carrier proteins actively transport things in and out of the cell
- have a carbohydrate attached and is used for cell signaling, adhesion and cell surface antigens
- Maintains the stability and fluidity of the bi-layer when the temperature fluctuates
5. What is not part of the Fluid Mosaic model?
- 7-10nm thick
- Constantly moving and diffrent shapes
- Used for cell signalling
- Phosopholipid bilayer