Thursday, April 26, 2012

RNA


C = cytosine 
A = Adenine
G = Guanine
U = Uracil (thymine swap)
Dark grey stripe = Phosphate
Light grey stripe = Ribose 




Tuesday, April 24, 2012

Marks

My mark is not where I want it to be right now because I took it too easy in the beginning of the school year. What I must do to get my mark higher is to work harder and hand in all the missing assignments that I have.

Cell labelling

1. Nucleolus - Produces ribosomes, made of RNA.
2. Nucleus - Stores genetic information, controls cell division, directs functioning of cell.
3. Ribosome - Site of protein synthesis, reads RNA code, translates into amino acid sequence.
4. Vesicle - Membrane bound sacs that transport materials around and out of cell.
5. Rough Endoplasmic Recticulum - Produces proteins and transports them to Smooth ER.
6. Golgi Body - Modifies proteins and lipids. Stores and packages molecules.
7. Cytoskeleton - Maintains cell shape, helps with transport in cell.
8. Smooth Endoplasmic Recticulum - Packages proteins, synthesizes membrane phospholipids, detoxifies drugs in liver cellls.
9. Mitochondria - Produces ATP, site of cellular respiration.
10. Vacuole - Maintains structure in plant cells. Acts as storage.
11. Cytoplasm - Gel-like substance that contains all the organelles.
12. Lysosome - Acts as garbage disposal, breaks down bacteria entering cell and worn out organelles.
13. Centrioles - Help the cell during mitosis and meiosis.

Cell membrane

Glycolipid- consists of a carbohydrate chain and a lipid. They provide the cell with a self recognition marker.
Glycoprotein (or recognition protein)- consists of a carbohydrate chain and a protein. Serve as cell surface attachment sites.
Phospholipids- main structural component of the membrane, isolates the cell's cytoplasm from the exterior.
Cholesterol- lipid found embedded within the plasma membrane, makes the bilayer stronger and more flexible, makes the membrane less permeable.
Carbohydrate- may attach to parts of the membrane (forming glycolipids or glycoproteins) and can act as receptor sites.
Receptor Protein- molecular triggers that set off cellular responses when specific molecules in the extracellular fluid bind to them (have a binding site).
Transport Protein- carriers that use energy (ATP) to move substances across the membrane, either on it's own, or in a vesicle.

Dna