The importance of diffusion in the microbial world
... anywhere else within the cell volume will be proportional to L2/D. Considering a typical diffusion coefficient (D) for small molecules, the time is of the order of milliseconds. Because the turnover rate for most enzymatic reactions is a few hundreds per second, substrate and product molecules can t ...
... anywhere else within the cell volume will be proportional to L2/D. Considering a typical diffusion coefficient (D) for small molecules, the time is of the order of milliseconds. Because the turnover rate for most enzymatic reactions is a few hundreds per second, substrate and product molecules can t ...
bio samples - Enrichment Plus
... microscopic organisms. They also discovered differences in cell structure between different organisms. They discovered that some organisms have characteristics that make it difficult to classify them as either plant or animal. Two kingdoms no longer worked, and eventually they decided on a five king ...
... microscopic organisms. They also discovered differences in cell structure between different organisms. They discovered that some organisms have characteristics that make it difficult to classify them as either plant or animal. Two kingdoms no longer worked, and eventually they decided on a five king ...
Microbial Nutrion and Growth
... during the death phase, some cells remain alive and continue metabolizing and reproducing, but the number of dying cells exceeds the number of new cells produced, so that eventually the population decreases to a fraction of its previous abundance. In some cases, all the cells die, while in others a ...
... during the death phase, some cells remain alive and continue metabolizing and reproducing, but the number of dying cells exceeds the number of new cells produced, so that eventually the population decreases to a fraction of its previous abundance. In some cases, all the cells die, while in others a ...
AP BIO Chp 11 Cell to Cell Communication
... Signal Transduction Pathways Convert signals on a cell’s surface into cellular responses Are similar in microbes and ...
... Signal Transduction Pathways Convert signals on a cell’s surface into cellular responses Are similar in microbes and ...
Prokaryotes vs. Eukaryotes
... Flagella Structure • Composed of filament, hook, and basal body • Flagellin protein (filament) arranged in chains and forms helix around hollow core • Base of filament inserts into hook • Basal body anchors filament and hook to cell wall by a rod and a series of either two or four rings • Filament ...
... Flagella Structure • Composed of filament, hook, and basal body • Flagellin protein (filament) arranged in chains and forms helix around hollow core • Base of filament inserts into hook • Basal body anchors filament and hook to cell wall by a rod and a series of either two or four rings • Filament ...
Option D6 Antibacterials
... reactions and other side effects such as body rash. 2. If used repeatedly, it may wipe out harmless or helpful bacteria. In addition these bacteria that are wiped out may be replaced by harmful bacteria. 3. Genetic resistance of bacteria. If antibiotics are used extensively some bacteria survive and ...
... reactions and other side effects such as body rash. 2. If used repeatedly, it may wipe out harmless or helpful bacteria. In addition these bacteria that are wiped out may be replaced by harmful bacteria. 3. Genetic resistance of bacteria. If antibiotics are used extensively some bacteria survive and ...
evidence brochure No 4 Hospital superbug
... Antibiotic resistance is a survival mechanism for bacteria. From the bacteria's point of view, any chemical that hinders its ability to survive is a poison it must avoid, or remove. The main methods of resisting antibiotics are as follows. 1. Changes to the permeability of the cell wall so that the ...
... Antibiotic resistance is a survival mechanism for bacteria. From the bacteria's point of view, any chemical that hinders its ability to survive is a poison it must avoid, or remove. The main methods of resisting antibiotics are as follows. 1. Changes to the permeability of the cell wall so that the ...
How does stuff get in and out of cells?
... • Substances can pass through PM because it is permeable. • They move WITH a concentration gradient • They do this via diffusion, osmosis, etc Facilitated Diffusion ...
... • Substances can pass through PM because it is permeable. • They move WITH a concentration gradient • They do this via diffusion, osmosis, etc Facilitated Diffusion ...
Chapter 11
... (lipid steroids) can readily cross the membrane and activate receptors • An activated hormone-receptor complex can act as a transcription factor, turning on specific ...
... (lipid steroids) can readily cross the membrane and activate receptors • An activated hormone-receptor complex can act as a transcription factor, turning on specific ...
Bacteria on target
... activates periplasmic FecR, which then activates the sigma factor FecI, resulting in gene expression ...
... activates periplasmic FecR, which then activates the sigma factor FecI, resulting in gene expression ...
The Immune System - University of Arizona
... responsible for this process (TNF converting enzyme or TACE) is an 824amino acid transmembrane protein whose catalytic portion is part of the extracellular domain. ...
... responsible for this process (TNF converting enzyme or TACE) is an 824amino acid transmembrane protein whose catalytic portion is part of the extracellular domain. ...
transport in cells enrichment level
... Regulating the water flow through the plasma membrane is an important factor in maintaining homeostasis within a cell. Homeostasis – maintaining a stable internal balance. ...
... Regulating the water flow through the plasma membrane is an important factor in maintaining homeostasis within a cell. Homeostasis – maintaining a stable internal balance. ...
Proposals Concerning the Higher Taxa of Bacteria
... this name to Schizophyta Cohn 1875, which implies an association with plants. Bacteriologists mostly ignored the kingdom name Monera, although Stanier and van Niel (28) accepted it in their critique of the 5th edition of Bergey’s Manual. But even in the 7th edition of the Manual (3), Protophyta Sach ...
... this name to Schizophyta Cohn 1875, which implies an association with plants. Bacteriologists mostly ignored the kingdom name Monera, although Stanier and van Niel (28) accepted it in their critique of the 5th edition of Bergey’s Manual. But even in the 7th edition of the Manual (3), Protophyta Sach ...
Proposals Concerning the Higher Taxa of Bacteria
... this name to Schizophyta Cohn 1875, which implies an association with plants. Bacteriologists mostly ignored the kingdom name Monera, although Stanier and van Niel (28) accepted it in their critique of the 5th edition of Bergey’s Manual. But even in the 7th edition of the Manual (3), Protophyta Sach ...
... this name to Schizophyta Cohn 1875, which implies an association with plants. Bacteriologists mostly ignored the kingdom name Monera, although Stanier and van Niel (28) accepted it in their critique of the 5th edition of Bergey’s Manual. But even in the 7th edition of the Manual (3), Protophyta Sach ...
membrane structure and function
... • May be specific • May be saturated or inhibited • Protein assists the process of diffusion; passive ...
... • May be specific • May be saturated or inhibited • Protein assists the process of diffusion; passive ...
Study Guide
... In the lysogenic, the virus is duplicated when the cell replicates. Lysogenic are frequently tumors. 7. What is a prophage and what do repressor genes do? Prophage (provirus): DNA from a virus that is incorporated into a bacteria’s DNA loop. Repressor genes: Genes that maintain the virus as a propha ...
... In the lysogenic, the virus is duplicated when the cell replicates. Lysogenic are frequently tumors. 7. What is a prophage and what do repressor genes do? Prophage (provirus): DNA from a virus that is incorporated into a bacteria’s DNA loop. Repressor genes: Genes that maintain the virus as a propha ...
Microscopy and Microbes
... • Always begin to locate a specimen with the 4x objective in position with the substage diaphragm set to the minimum brightness. • Set the light intensity knob (on the base of the microscope) to position "8". • Only use the coarse focus knob with the 4X and 10X objectives. • If you cannot locate the ...
... • Always begin to locate a specimen with the 4x objective in position with the substage diaphragm set to the minimum brightness. • Set the light intensity knob (on the base of the microscope) to position "8". • Only use the coarse focus knob with the 4X and 10X objectives. • If you cannot locate the ...
PPT - Yavapai College
... • Eukaryotic cells evolved from fusion or integration of prokaryotic cells • Best evidence is in bacterial or prokaryotic appearance of mitochondria and chloroplasts • These organelles are like little bacterial cells within our cells, now fully functionally integrated • They perform fundamental cell ...
... • Eukaryotic cells evolved from fusion or integration of prokaryotic cells • Best evidence is in bacterial or prokaryotic appearance of mitochondria and chloroplasts • These organelles are like little bacterial cells within our cells, now fully functionally integrated • They perform fundamental cell ...
How are Prokaryotic and Eukaryotic Cells Alike and
... 1. The teacher will observe each student's placement of the index card on the Venn diagram which indicates understanding of how the two major types of cells are alike and different. The teacher is checking for understanding before the index cards are attached to the diagram and the student has the o ...
... 1. The teacher will observe each student's placement of the index card on the Venn diagram which indicates understanding of how the two major types of cells are alike and different. The teacher is checking for understanding before the index cards are attached to the diagram and the student has the o ...
Sun, 12 Mar 2017 20:29:36 - International Journal of Systematic and
... features. We distinguish between branched and unbranched rods, between those that have rigid and those that have flexible cells, between those in which t h e cell i s s p i r a l shaped and those in which it i s not; these a r e the kinds of character that we use to define bacteria in the categories ...
... features. We distinguish between branched and unbranched rods, between those that have rigid and those that have flexible cells, between those in which t h e cell i s s p i r a l shaped and those in which it i s not; these a r e the kinds of character that we use to define bacteria in the categories ...
Subcellular organelles in Eukaryotic cells
... •The most important/widely used host strain in commercial production of recombinant proteins/metabolites The fastest growth High cell density cultivation in large scale culture Easy manipulation of cells and many genetic engineering tools l Deep understanding physiology/metabolism ...
... •The most important/widely used host strain in commercial production of recombinant proteins/metabolites The fastest growth High cell density cultivation in large scale culture Easy manipulation of cells and many genetic engineering tools l Deep understanding physiology/metabolism ...
J.B.S. Haldane
... obtained the energy which they needed for growth by some other process than oxidation –in fact, by fermentation. For, as Pasteur put it, fermentation is life without oxygen. If this was so, we should expect that high organisms like ourselves would start life as anaerobic beings, just as we start as ...
... obtained the energy which they needed for growth by some other process than oxidation –in fact, by fermentation. For, as Pasteur put it, fermentation is life without oxygen. If this was so, we should expect that high organisms like ourselves would start life as anaerobic beings, just as we start as ...
Chemotaxis
Chemotaxis (from chemo- + taxis) is the movement of an organism in response to a chemical stimulus. Somatic cells, bacteria, and other single-cell or multicellular organisms direct their movements according to certain chemicals in their environment. This is important for bacteria to find food (e.g., glucose) by swimming toward the highest concentration of food molecules, or to flee from poisons (e.g., phenol). In multicellular organisms, chemotaxis is critical to early development (e.g., movement of sperm towards the egg during fertilization) and subsequent phases of development (e.g., migration of neurons or lymphocytes) as well as in normal function. In addition, it has been recognized that mechanisms that allow chemotaxis in animals can be subverted during cancer metastasis.Positive chemotaxis occurs if the movement is toward a higher concentration of the chemical in question; negative chemotaxis if the movement is in the opposite direction. Chemically prompted kinesis (randomly directed or nondirectional) can be called chemokinesis.