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Certain proteins need to be kept available for quick mobilization when a specific signal is recieved. In this example we see how proteins that allow glucose into a cell are recycled. More detail... |
During constitutive secretion, proteins are synthesized and moved to the cell membrane without regard to extracellular signals. More detail... |
In cells using regulated secretion, proteins are synthesized and stored in secretory vesicles at the cell membrane until an outside signal leads to their release. More detail... |
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Protein modification is the process by which some proteins from the rough ER are altered within the Golgi apparatus in order to be targeted to their final destinations. More detail... |
Protein trafficking is used to describe the process of moving proteins from the rough ER, through the Golgi apparatus, where they are modified and packaged into vesicles. More detail... |
Photosynthesis is the means by which plants make use of chorophyll and light to produce energy. This section covers the basic stages in the photosynthetic electron transport chain. More detail... |
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Photosynthesis allows plants to use the energy in light to produce molecular oxygen. Photosystem II is the complex where this action occurs. More detail... |
Once translated, proteins are dispersed throughout the cellular environment. This section covers the transport of a protein into a specific organelle--the mitochondria. More detail... |
Gradients are used to create energy that can power biological cyles. ATP synthase is powered by a hydrogen gradient, located in the mitochondria. This section covers the action of this specific gradient. More detail... |
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Cellular respiration occurs in the mitochondria and provides both animals and plants with the energy needed to power other cellular processes. This section covers the electron transport chain. More detail... |
Transcription describes the process in which mRNA is produced. This section covers the creation of mRNA, as well as the factors leading up to its production. More detail... |
After being transcribed, mRNA is processed. Before mRNA can be spliced, certain features must be added. These alterations are made during mRNA processing. More detail... |
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Before being used in translation, mRNA must be spliced. During splicing, exons are removed and the translateable introns that remain are spliced into a single strand of mRNA. More detail... |
Translation is the process in which ribosomes translate a strand of mRNA into a protein. This section covers the steps leading up to the creation of such a protein. More detail... |
The lac operon refers to the gene responsible for digesting lactose molecules in a bacterial cell. This section covers the activation and function of this gene. More detail... |