• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Archives of Microbiology
Archives of Microbiology

... formed swarms, although smaller than did cells of the parent strain. On T Y C plates m u t a n t cells formed only a small colony, confined exclusively to the site of inoculation, whereas A348 cells formed swarms as large as those seen on TY swarm plates (Fig. 1B). The same observations were made fo ...
The Relationship between Methylmercury Dosages and Amount of
The Relationship between Methylmercury Dosages and Amount of

... determined by the images under transmitted light. While it was evident that endocytic activity had been occurring in these glial cells, the exact number of endosomes could not be quantified because they were often clumped together and indistinguishable. Instead, a fluorescent spot within a glial cel ...
Collagenase - Thermo Fisher Scientific
Collagenase - Thermo Fisher Scientific

... the enzymes which hydrolyze the other proteins, polysaccharides, and lipids in the extracellular matrix of connective and epithelial tissues. Crude collagenase does exhibit lot-to-lot variability and may produce occasional toxicity. The activity of these crude collagenase preparations has been corre ...
File
File

...  Cell membrane controls what gets in or out  Need to allow some materials — but not all — to pass through the membrane ...
Cells are the basic units of all living things.
Cells are the basic units of all living things.

... late 1600s. It was Antony van Leeuwenhoek (1632–1723) who built what is thought to be the first successful light microscope (Figure 1.5). Van Leeuwenhoek had taught himself how to ...
changes in DNA AT14A mediates the cell wall–plasma membrane
changes in DNA AT14A mediates the cell wall–plasma membrane

... microscopy. Cd treatment induced a DNAsize, hypermethylation, well as an up-regulation of CMT, indicatingbetween that de cells, and the adhesion of plasma membrane to a cell walldose varied Using direct staining of filamentous novo methylation did indeed occur. Moreover, high of by Cdplasmolysis. le ...
Proposal - people.vcu.edu
Proposal - people.vcu.edu

... epidermal cells during prenatal development. Whittock et al (2002) previously conducted a study in which an individual displaying a skin abnormality was observed from birth into adulthood. The patient was found to have a mutation in desmoplakin, ultimately leading to blistering and an early onset of ...
All About Cells - Open School BC
All About Cells - Open School BC

... So, how do you know if something is living? Some non-living things may show some of the characteristics listed above. Clouds move through the sky—are they living? Volcanoes grow over time and exchange gases with their environment—are they living? Clouds and volcanoes are both non-living things. They ...
CD38 positive natural killer cells may be involved in progression of
CD38 positive natural killer cells may be involved in progression of

... synovial fluid (SF) in the pathogenesis of rheumatoid arthritis (RA). Paired samples of PB and synovial fluid (SF) were obtained from patients with RA, osteoarthritis (OA), and uratic arthritis (UA), as well as healthy subjects. Frequency and phenotype of peripheral and synovial NK cells were analyz ...
Thiazolidinediones Inhibit the Expression of
Thiazolidinediones Inhibit the Expression of

... made it a very attractive target for the development of antiobesity drugs (5). Such 3-AR agonists have been developed based on the rodent 3-AR, and indeed when given chronically to these animals, they enhance lipolysis and thermogenesis, reduce fat accumulation in response to overfeeding (6), and ...
RNA biosensor for imaging translation
RNA biosensor for imaging translation

... -  What do you know about G-proteins (function, subunits, mechanism)? ...
1. Introduction 2. Fundamentals 3. Glycosylation 4
1. Introduction 2. Fundamentals 3. Glycosylation 4

... hypermannosylate but use several additional types of sugars to synthesize an Nglycan of the complex type. So if a human glycoprotein is expressed in yeast, the sequence of the amino acids will be right, even the location of the glycosylation will be right, but the glycan isn’t of the complex type bu ...
Coatomer Is Essential for Retrieval of Dilysine
Coatomer Is Essential for Retrieval of Dilysine

... expressing SteP-Wbplp was only due to intracellular sequestration of Ste2-Wbplp. In contrast, sec27-7 mutant cells, which are mutated in the yeast y-COP, exhibited modest mating that was particularly apparent at 30°C33Y.Z (Figure 2). More efficient mating was observed in sec27-7 mutant cells(Figure ...
Dichotomous Keys
Dichotomous Keys

... Plants do not grow as clumps of fronds; plants produce seeds in addition to spores; do not require water to unite sex cells Leaves are needles or scales with waxy coating; male and female cones produce spores; male spores develop as pollen grains and produce sperm; female spores develop in structure ...
Chapter 39 - FacStaff Home Page for CBU
Chapter 39 - FacStaff Home Page for CBU

... They also found that the acidity of the of the cell wall changed from a pH of 5.5 to one of 4.5. The cell wall is rigid. So how does the cell wall expands? Cosgrove found two classes of cell wall proteins that actively increase cell length when the pH in the cell wall drops below 4.5. These proteins ...
SI Worksheet 5 Answers
SI Worksheet 5 Answers

... 2.Use the terms on the left to fill in the blanks in the statements on the right. The terms can be used more than once or not at all. Terms can be used as singular or as plural ( i.e. “s” at the end) 1.A cells membrane is selectively permeable due to the pore size and __polarity____ of the molecules ...
osmosis
osmosis

... What is Osmosis? A. The movement of molecules. B. The movement of molecules from an area of high concentration to low concentration. C. The movement of water from a low concentration to a high concentration. D. The movement of water from a high concentration to a low concentration. ...
Microsoft Word
Microsoft Word

Membrane Structure, Function and Transport Across Membranes
Membrane Structure, Function and Transport Across Membranes

... Cell walls of plant, fungal and bacterial cells are rigid and prevent swelling. The walls are strong enough to withstand a fairly high pressure. When a plant cell absorbs water, it swells and the cell membrane pushes against the cell wall. This is called turgor pressure and allows the plant to stay ...
CELL MEMBRANE AND TRANSPORT A. Plasma Membrane
CELL MEMBRANE AND TRANSPORT A. Plasma Membrane

... o Function is support of large plants. o Wood is made largely of secondary cell wall material. Cellulose of plant cell walls used by humans: cotton, rayon, flax, hemp, paper, wood, paper (paper has lignin removed to prevent yellowing). Lignin used in manufacture of rubber, plastics, pigments, adhesi ...
Cell Source Optimization for Cardiac Tissue Engineering
Cell Source Optimization for Cardiac Tissue Engineering

... derived stem cells (hADSCs) by methods of co-culture and chemical induction to produce functional cardiomyocytes, as well as by mechanical and electrical stimulation in a bioreactor. Ultimately, pre-differentiated cardiomyocytes could be implanted into diseased patients in order to provide a functio ...
Cloning
Cloning

... What do scientists use to create a clone animal? They use the genes of the first animal so they both have the same DNA. ...
Mitochondrial involvement in tracheary element
Mitochondrial involvement in tracheary element

... vessels. The cell prepares for autolysis by nascent synthesis of hydrolases which become sequestered in its large central vacuole well before the wall becomes apparent. A regulatory protease is secreted during wall synthesis, and when its level of activity reaches a threshold level, Ca2+ influx is t ...
Why our backs can`t read braille: Scientists map sensory nerves in
Why our backs can`t read braille: Scientists map sensory nerves in

... One of the most remarkable axon patterns looked like an extensive vine on a trellis, with its tendrils wrapping around approximately 200 hair follicles (see image). The total length of one of these axons, with all its branches, was several times longer than the body of a mouse. Nathans says the imag ...
Shp1 regulates T cell homeostasis by limiting IL
Shp1 regulates T cell homeostasis by limiting IL

... The expression of these markers was identical in Shp1deficient memory phenotype cells and the naturally occurring memory phenotype population present in wild-type mice. This finding suggests that the Shp1-deficient CD44hi population reflects an expansion of normally occurring memory phenotype T cell ...
< 1 ... 397 398 399 400 401 402 403 404 405 ... 1231 >

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.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report