TOPIC 3 : VOICE OF THE GENOME
- Created by: dav09
- Created on: 11-09-21 16:49
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- Topic 3 : the voice of genome
- All living cells are made up of cells, some share common features
- In multicellular organisms cells can be organised as: cells - tissues - organs -organ system.
- Rough Endoplasmic Reticulum
- A series of flattened sacs enclosed by a membrane with ribosomes on the surface
- The RER folds and processes proteins made on the ribosomes; often located by the nucleus
- There are several types of cells. Human are made up of Eukaryotic cells - which contains a nucleus and membrane-bound organelles
- A more detailed structure of a cell is called a ultrastructure, which can be using a microscope
- Nucleus
- Surrounded by double membrane called the envelope: contains DNA enabling molecules to enter/leave the nucleus.
- Nucleus contains DNA wrapped around histone protein in complex called chromatin and nucleus = is the site of ribosome production
- Smooth Endoplasmic Reticulum
- A system of membrane- bound sacs.
- The SER produces and processes lipids.
- Golgi Apparatus
- A series of. fluid-filled, flattened and curved sacs with vesicles surrounding the edges.
- The GA modifies and packages proteins (after budding off the RER) and lipids.
- It produces lysosomes.
- Mitochondria
- Oval shaped and bound by a double membrane called the envelope.
- The inner membrane is folded to form projection called cristae - with a fluid matrix containing enzymes used for cellular respiration.
- Centrioles
- Hollow cylinders containing microtubules arranged at right angles to each other
- Centrioles are involved in cell division.
- 80S Ribosomes
- Composed of two subunits
- Site of protein synthesis
- Lysosomes
- Vesicles, containing digestive enzymes, bound by a single membrane,
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