Friday, 24 February 2012

Labeling Organelles

Functions:
 1) Nucleolus : produces ribosomes, contains RNA.
 2) Nucleus : contains chromatin(DNA and protiens) and RNA, stores genetic information, controlls cell division, and directs functioning of the cell.
 3) Ribosomes :made of RNA and protien, site of protien synthesis, reads RNA code and translates into amino acid sequence.
 4) Vesicles : transport materials around or out of the cell, membrane bound sac, formed from pinching off of membrane of E.R.
 5) Rough E.R. : ribosomes on surface, network of tubules.
 6) Golgi Body : stacked flat sacs, accept vesicles on one side and produce them on the other side, storage and packing of molecules, modifys proteins.
 7) Cytoskeleton : protien filaments and tubules throughout cytoplasm, maintains cell shape, transport of vesicles and organelles.
 8) Smooth E.R. : lack ribosomes, network of tubules, packages protiens for transport, detoxifies liver cells, large surface area, sythesizes lipid triglyerides and steroids.
 9) Mitochondria : production of ATP (site of cellular respiration), powerhouse of the cell, double bound membrane.
10) Vacuole : membrane bound sac, larger than vesicles, storage.
11) Cytoplasm : gel substance within the cell membrane that holds together all the organelles.
12) Lysosome : contain digestive enzymes, garbage disposal, break down bacteria entering cell, intracellular digestion, manufactured by golgi body.
13) Centrioles : made of microtubules, help in cell division.

Friday, 17 February 2012

Biological Molecule Identification Lab


  • Food items (apple, ham, cheese, bread, noodles, grape) used to demonstrate what contains carbs and what doesn't. The test tubes showed us which foods such as grapes and bread contained monosaccharides. This positive reaction would be indicative of a yellowish-orange brown change in color: