• 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
BLUE-GREEN ALGAE · CYANOBACTERIA
BLUE-GREEN ALGAE · CYANOBACTERIA

... The Cyanobacteria are ubiquitous, occurring in both seawater and freshwater, on unconsolidated substrata—endolithically in deserts and in Antarctic ice, and epilithically on tropical intertidal limestone. They are important fixers of nitrogen, contibute to toxic red tides, and were some of the first ...
Partial genetic suppression of a loss-of
Partial genetic suppression of a loss-of

... Neuronal ceroid lipofuscinosis (NCL) is the most common childhoodonset neurodegenerative disease. NCL is inevitably fatal, and there is currently no treatment available. Children with NCL show a progressive decline in movement, vision and mental abilities, and an accumulation of autofluorescent depo ...
CELL TRANSPORT
CELL TRANSPORT

... In the space at the left, write true if the statement is true. If the statement is false, change the italicized term to make the statement true. Write this answer in the blank provided. _______________ 5. In passive transport, the movement of particles across a membrane requires energy. ____________ ...
Human Papilloma Virus (HPV)
Human Papilloma Virus (HPV)

... They can appear on the vulva, in or around the vagina, or anus, on the cervix, and on the penis, scrotum, groin, or thigh.  Warts may appear within weeks or months after sexual contact with an infected person or they may not even appear at all. ...
Measles Virus Matrix Protein Inhibits Host Cell Transcription
Measles Virus Matrix Protein Inhibits Host Cell Transcription

... When expressed in COS-7 cells, GFP-MeVM localized predominantly to the plasma membrane and diffused throughout the cytoplasm, as expected [17]. A small proportion of GFP-MeVM also localized to the nucleus as defined by co-staining with Hoechst 33342, with 9% of total M being nuclear (Fig 1A). GFP al ...
Programmed Cell Death in Plants: A Role for Mitochondrial
Programmed Cell Death in Plants: A Role for Mitochondrial

... comparing the functions of key components involved in these processes between kingdoms may serve fruitful for understanding the regulation of PCD in both. For example, cytochrome c release from mitochondria is a key event in apoptosis in animal cells and has also been shown to be an early event in P ...
bacteria_archaea_studyguide
bacteria_archaea_studyguide

... You should now have some idea why there is so much potential for genetic diversity with bacterial populations. Although mutation is the major source of genetic variation in prokaryotes, listed below are the other three ways variation is introduced. Explain each one. ...
File
File

... wet mount • Use the fine adjustment to bring the letter into sharp focus. • Adjust the diaphragm as you look through the eyepiece, and you will see that more detail is visible when you allow in less light! Too much light will give the specimen a washed-out appearance. • PRACTICE ...
A Class of Human Proteins that Deliver Functional
A Class of Human Proteins that Deliver Functional

Minireview - Biologie am KIT
Minireview - Biologie am KIT

... Department of Biology, Utrecht University, 3584 CH Utrecht, The Netherlands *Correspondence: [email protected] (F.L.H.M.), [email protected] (B.S.) DOI 10.1016/j.cell.2009.06.007 ...
Regulation of the Different Chromatin States of Autosomes
Regulation of the Different Chromatin States of Autosomes

... early embryo: mes sterility is maternaleffect (4 ), and analysis of a temperaturesensitive allele of mes-3 suggests that MES-3 function is required in the mother’s germ line and during embryogenesis (22). Generally, M⫺Z⫺ hermaphrodites have severely degenerated germ lines with poor chromosome morpho ...
Cell Cycle-Dependent Targeting of a Kinesin at the Plasma
Cell Cycle-Dependent Targeting of a Kinesin at the Plasma

... within 10 min and consequently also the ADZ disappeared (Figure 3B). Therefore, cells were imaged after 20 min of treatment. A noticeable difference was that the progression from metaphase till the end of cytokinesis took much longer (3 hr 26 min for the cell shown in Figure 3B) than typically recor ...
Chapter 4: The Tissue Level of Organization
Chapter 4: The Tissue Level of Organization

... • Embryonic layers give rise to all four tissue types in adults – Ectoderm: nervous, epithelial (epidermis) – Mesoderm: muscle, connective, epithelial (endothelium + mesothelium) – Endoderm: epithelial (mucosa) ...
Membrane Notes
Membrane Notes

... • Water is so small and there is so much of it the cell can’t control it’s movement through the cell membrane. ...
Synaptic basis for intense thalamocortical activation of feedforward
Synaptic basis for intense thalamocortical activation of feedforward

... within a pair (Fig. 3g). Of these 13 pairs, 9 were similar to the example in that the FS and RS cells showed clear response failures and successes on matching trials (data not shown). Even when originating from a common presynaptic cell, the ‘minimal EPSCs’ usually had markedly different amplitudes ...
- IMSA Digital Commons
- IMSA Digital Commons

... complete, organogenesis may begin. Initiation of neurogenesis starts with notochord formation from the dorsal mesoderm.21 The initial fate of the ectoderm is neural, but BMP4 and Wnt presence inhibits differentiation as these proteins are anti-neuralizing agents. Chordin, noggin, and follistatin (bl ...
Telomerase activity and differential expression of telomerase genes
Telomerase activity and differential expression of telomerase genes

... Received 22 April 2004; Revised 31 May 2004; Accepted 1 June 2004 ...
Introducing Antisense Oligonucleotides into Cells
Introducing Antisense Oligonucleotides into Cells

...  Proteins derived from the coat of Sendai viruses are known to promote fusion of lipid bilayers. In one series of experiments, oligonucleotides were packaged in liposomes complexed with coat proteins derived from the hemagglutinating virus of Japan (HVJ, a Sendai family virus) and were infused into ...
Chapter 17
Chapter 17

... cells (see Note 3). Simple modifications of this protocol can be used for assaying receptors in different types of native or engineered cells, including suspension cells (see Note 4). These modifications include the cell culture medium and time, initial seeding numbers of cells, cell synchronization ...
Most Human Proteins Made in Both Nucleus and Cytoplasm Turn
Most Human Proteins Made in Both Nucleus and Cytoplasm Turn

... images). After 30 s in puromycin, the nuclear signal decreases and becomes more diffuse (Fig. 2C). After 60 s, the peri-nuclear region becomes the brightest (Fig. 2D,E). These changes mimic those seen previously and are simply interpreted in light of the known behaviour of puromycylated peptides: af ...
Overview of the Lymphatic System
Overview of the Lymphatic System

...  Maintenance of blood – returns leaked plasma proteins to blood ...
comaneanu r - Revista de Chimie
comaneanu r - Revista de Chimie

... in order to interact with biologic systems”. Bruck [3] defines a biomaterial as „a synthetic material or of natural origin, in contact with tissues, blood and biologic fluids, used for reconstruction, diagnosis and therapy, without generating side effects which might affect living bodies or their co ...
Cellular Respiration
Cellular Respiration

... Cellular Respiration, process in which cells produce the energy they need to survive. In cellular respiration, cells use oxygen to break down the sugar glucose and store its energy in molecules of adenosine triphosphate (ATP). Cellular respiration is critical for the survival of most organisms becau ...
Marker Evolution during the Development of the
Marker Evolution during the Development of the

... requires a precise description of the types present in the normal mammary gland. In order to evaluate the significance of the cell types present in cancers, the developmental evolution of the normal cell types is also important. We report here studies dealing with these two questions in the rat mamm ...
Exam 3 Review Sheet 11/8/10
Exam 3 Review Sheet 11/8/10

... 47. Why is the nucleus NOT NOT NOT (just incase you didn’t see the first NOT) the control center/brain of the cell? 48. (You will see this question for sure) We discussed the RNA world hypothesis in class. Describe why it is logical to hypothesize that RNA was used by the most primitive of cells bef ...
< 1 ... 429 430 431 432 433 434 435 436 437 ... 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