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The Factory, The Cell
The Factory, The Cell

... where the operations of the entire factory take place. B. Where to find workers, machines, materials and products moving from place to place. ...
cDNA-derived molecular characteristics and antibodies to a new
cDNA-derived molecular characteristics and antibodies to a new

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Review of the Cell and its Organelles
Review of the Cell and its Organelles

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The Four Major Methods of Producing ATP
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Lesson-Plans-Unit-1-Cells-and-Microbiology
Lesson-Plans-Unit-1-Cells-and-Microbiology

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root tips - Oxford Academic

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Organs, Tissues and All Living Systems Long Answer Rubric
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Downloaded - Annals of the Rheumatic Diseases
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The 2016 Nobel Prize in Physiology or Medicine
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... d. turgid 13. All of the following statements about membrane structure and function are true except a. Diffusion, osmosis, & facilitated diffusion do not require energy input from the cell b. Voltage across the membrane depends on an unequal distribution of ions across the plasma membrane c. Diffusi ...
1.5 The Origin of Cells Lesson
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... • To form the first cells, membranes were needed to separate the cytoplasm and its metabolism from the surrounding fluid. • Phospholipids the molecules that make up cell membranes, naturally form a lipid bilayers in water. • These bilayers form spherical structures, that enclose a droplet of fluid. ...
DiffusionOsmosis reading
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... cell must use energy to accomplish this; in others, the cell does not need to use energy. Passive transport is a type of movement across a cell membrane that relies on the ordinary movement of molecules: the cell does not need to use its energy to make it happen. Because molecules are in constant mo ...
Hyperosmotic stress-induced actin filament reorganization in leaf
Hyperosmotic stress-induced actin filament reorganization in leaf

... perinuclear AF cages (Fig. 2D). In differentiating and mature cells AF bundles emerging from the perinuclear cytoplasm entered the transvacuolar cytoplasmic strands, often reaching the cell cortex (Fig. 2G). AF organization in plasmolysed cells In plasmolysed cells, the AF cytoskeleton is signi®cant ...
Document
Document

... ○ Retroviruses have a single-stranded RNA genomes of the plus sense, that means the RNA strand has the same base sequences as the mRNA (but unlike Baltimore class IV their plus- sense RNA genomes do not serve as mRNAs) ○ Encoding for the enzyme reverse transcriptase enters into the cell with the vir ...
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Amitosis

Amitosis (a- + mitosis) is absence of mitosis, the usual form of cell division in the cells of eukaryotes. There are several senses in which eukaryotic cells can be amitotic. One refers to capability for non-mitotic division and the other refers to lack of capability for division. In one sense of the word, which is now mostly obsolete, amitosis is cell division in eukaryotic cells that happens without the usual features of mitosis as seen on microscopy, namely, without nuclear envelope breakdown and without formation of mitotic spindle and condensed chromosomes as far as microscopy can detect. However, most examples of cell division formerly thought to belong to this supposedly ""non-mitotic"" class, such as the division of unicellular eukaryotes, are today recognized as belonging to a class of mitosis called closed mitosis. A spectrum of mitotic activity can be categorized as open, semi-closed, and closed mitosis, depending on the fate of the nuclear envelope. An exception is the division of ciliate macronucleus, which is not mitotic, and the reference to this process as amitosis may be the only legitimate use of the ""non-mitotic division"" sense of the term today. In animals and plants which normally have open mitosis, the microscopic picture described in the 19th century as amitosis most likely corresponded to apoptosis, a process of programmed cell death associated with fragmentation of the nucleus and cytoplasm. Relatedly, even in the late 19th century cytologists mentioned that in larger life forms, amitosis is a ""forerunner of degeneration"".Another sense of amitotic refers to cells of certain tissues that are usually no longer capable of mitosis once the organism has matured into adulthood. In humans this is true of various muscle and nerve tissue types; if the existing ones are damaged, they cannot be replaced with new ones of equal capability. For example, cardiac muscle destroyed by heart attack and nerves destroyed by piercing trauma usually cannot regenerate. In contrast, skin cells are capable of mitosis throughout adulthood; old skin cells that die and slough off are replaced with new ones. Human liver tissue also has a sort of dormant regenerative ability; it is usually not needed or expressed but can be elicited if needed.
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