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18.4 – Bacteria and Archaea Prokaryotes are
18.4 – Bacteria and Archaea Prokaryotes are

...  Spiral-shaped: spirilla or spirochetes  Spherical: cocci o DNA is in the form of a circle and is surrounded by cytoplasm o May have plasmids – small pieces of genetic material that can replicate separately from the main chromosome o Most prokaryotes can move on their own by gliding or using flage ...
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... rather than on RING fingers The resulting ubiquitinated MHC class I chains not only undergo enhanced endocytosis but are also directed preferentially to lysosomes. In both yeast and mammalian cells, the latter trafficking steps are usually accomplished through the multivesicular body (MVB). This str ...
Case Study Template 1
Case Study Template 1

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... Know the structure and properties of the lipids typically found in biological membranes Be able to describe the biological roles of membranes Be able clearly describe the ordered structures formed by lipids in water Understand the general properties and components of the Fluid mosaic model of biolog ...
Insulin-like growth factors - California State University, Long Beach
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... Figure 2. Microphotographic showing: (A) Structure and equipment for microinjection; (B) isolated and condensed chromosomes used for microinjection mediated chromosome transfer; (C) microinjection procedure; (D) plasmolysis and dehydration of the cell in the agarose monolayer; (E) microcalli develop ...
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Bell Work: What is the fundamental unit of life?

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... measured in nanometers (nm). 1 nm= 1 billionth of a meter. Structures of Viruses I. All viruses have 2 basic parts: A.An outer coat that protects the virus made of proteins that allow the virus to attach to a cell. This is specific to cells, meaning that viruses can only attach to cells that fit th ...
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... Bio.1.1.1 Summarize the structure and function of organelles in eukaryotic cells (including the nucleus, plasma membrane, cell wall, mitochondria, vacuoles, chloroplasts, and ribosomes) and ways that these organelles interact with each other to perform the function of the cell. • Identify these cell ...
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DIGESTION AND ABSORPTION OF LIPIDS
DIGESTION AND ABSORPTION OF LIPIDS

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Metallic and Ionic Structures and Bonding Ionic compounds are

... 1:1 salts. Consideration of the anions (large spheres) indicates that there are six in faces, which contribute one half each for a contribution of three, and that there are eight on the corners, which contribute one eighth each for a contribution of 4 anions to the cell. Alternatively, using the ca ...
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A: DNA

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Endomembrane system

The endomembrane system is composed of the different membranes that are suspended in the cytoplasm within a eukaryotic cell. These membranes divide the cell into functional and structural compartments, or organelles. In eukaryotes the organelles of the endomembrane system include: the nuclear membrane, the endoplasmic reticulum, the Golgi apparatus, lysosomes, vesicles, endosomes and the cell membrane. The system is defined more accurately as the set of membranes that form a single functional and developmental unit, either being connected directly, or exchanging material through vesicle transport. Importantly, the endomembrane system does not include the membranes of mitochondria or chloroplasts.The nuclear membrane contains two lipid bilayers that encompass the contents of the nucleus. The endoplasmic reticulum (ER) is a synthesis and transport organelle that branches into the cytoplasm in plant and animal cells. The Golgi apparatus is a series of multiple compartments where molecules are packaged for delivery to other cell components or for secretion from the cell. Vacuoles, which are found in both plant and animal cells (though much bigger in plant cells), are responsible for maintaining the shape and structure of the cell as well as storing waste products. A vesicle is a relatively small, membrane-enclosed sac that stores or transports substances. The cell membrane, is a protective barrier that regulates what enters and leaves the cell. There is also an organelle known as the Spitzenkörper that is only found in fungi, and is connected with hyphal tip growth.In prokaryotes endomembranes are rare, although in many photosynthetic bacteria the plasma membrane is highly folded and most of the cell cytoplasm is filled with layers of light-gathering membrane. These light-gathering membranes may even form enclosed structures called chlorosomes in green sulfur bacteria.The organelles of the endomembrane system are related through direct contact or by the transfer of membrane segments as vesicles. Despite these relationships, the various membranes are not identical in structure and function. The thickness, molecular composition, and metabolic behavior of a membrane are not fixed, they may be modified several times during the membrane's life. One unifying characteristic the membranes share is a lipid bilayer, with proteins attached to either side or traversing them.
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