AussieAnimal1. Dynamic Periodic Table. Gould League - Food Webs - build your own. A Science Odyssey: You Try It: DNA Workshop. An embryonic cell divides again and again. Where there was one cell there are two, then four, then eight,... Each holds all the genetic information needed to create a human being. How, exactly, do these cells make copies of themselves? Hair grows from your head, nonstop, day in and day out. The cells of your hair follicles somehow generate all of the protein that make up this hair. How is this protein created? The answers to these questions are DNA replication and protein synthesis. Knowledge of the structure of DNA began with the discovery of nucleic acids in 1869. The activity in this section places you within the cell, involving you with the processes of DNA replication and protein synthesis.
If you're interested in finding out more about DNA and protein synthesis, check out the other sections. Related People and Discoveries entries. The Scale of the Universe. Collection of Biology Youtube Videos. CellCraft - Interactive Science Games & Simulations - Teacher Resources - Carolina Biological Supply Company. Narrated Animations. Malaria. Meiosis and Mitosis. Selection of different interactive simulations. Membrane Transport. Gizmos! Online simulations. Animal and Plant cells. Interactive Animal and Plant Cells. Nucleolus: The prominent structure in the nucleus is the nucleolus.
The nucleolus produces ribosomes, which move out of the nucleus and take positions on the rough endoplasmic reticulum where they are critical in protein synthesis. Cytosol: The cytosol is the "soup" within which all the other cell organelles reside and where most of the cellular metabolism occurs. Though mostly water, the cytosol is full of proteins that control cell metabolism including signal transduction pathways, glycolysis, intracellular receptors, and transcription factors. Cytoplasm: This is a collective term for the cytosol plus the organelles suspended within the cytosol. Centrosome: The centrosome, or MICROTUBULE ORGANIZING CENTER (MTOC), is an area in the cell where microtubules are produced. Plant and animal cell centrosomes play similar roles in cell division, and both include collections of microtubules, but the plant cell centrosome is simpler and does not have centrioles.
Membrane Transport. Enzyme Kinetics. Meiosis.