Section 9.1 - CPO Science
... protozoans • Flagellates are a group of protozoans that move using a whip-like organelle called a flagellum. • A euglena is a flagellate commonly found in pond water. ...
... protozoans • Flagellates are a group of protozoans that move using a whip-like organelle called a flagellum. • A euglena is a flagellate commonly found in pond water. ...
06_Lecture_Presentation
... Longitudinal section Microtubules Cross section of one centriole of the other centriole ...
... Longitudinal section Microtubules Cross section of one centriole of the other centriole ...
Group-specific effects on coastal bacterioplankton of
... ABSTRACT: Polyunsaturated aldehydes (PUAs), produced as secondary metabolites by diatoms, have been shown to induce toxic effects on a variety of organisms, including copepods and phytoand bacterioplankton. However, the nature of and the players in this interaction remain poorly understood. We teste ...
... ABSTRACT: Polyunsaturated aldehydes (PUAs), produced as secondary metabolites by diatoms, have been shown to induce toxic effects on a variety of organisms, including copepods and phytoand bacterioplankton. However, the nature of and the players in this interaction remain poorly understood. We teste ...
Bactericidal activity of the organo
... and causes a six orders of magnitude decrease in viability in a protein-rich medium, but not in a protein-poorer medium, unless 2-mercaptoethanol is added. Subinhibitory concentrations inhibit motility and biofilm formation. AS101 enters the bacterium through its porins and causes bacterial damage t ...
... and causes a six orders of magnitude decrease in viability in a protein-rich medium, but not in a protein-poorer medium, unless 2-mercaptoethanol is added. Subinhibitory concentrations inhibit motility and biofilm formation. AS101 enters the bacterium through its porins and causes bacterial damage t ...
The archaeal origins of the eukaryotic translational system
... segmental structure associated uniquely to one, two or all three of the phylodomains (Vishwanath et al. 2004) (Figure 3). Critically, the current analyses show that eukaryotic homologous proteins contain only the archaeal-specific blocks and no bacterial-specific blocks, with the possible but unclea ...
... segmental structure associated uniquely to one, two or all three of the phylodomains (Vishwanath et al. 2004) (Figure 3). Critically, the current analyses show that eukaryotic homologous proteins contain only the archaeal-specific blocks and no bacterial-specific blocks, with the possible but unclea ...
An inside-out origin for the eukaryotic cell
... changes in osmotic pressure. How cells generate stable protrusions is important for the model, since this corresponds to the first step in the evolution of the cytoplasm (Figure 1). We speculate that positive curvature at the protrusion’s base was first stabilized by proteins containing seven-blade ...
... changes in osmotic pressure. How cells generate stable protrusions is important for the model, since this corresponds to the first step in the evolution of the cytoplasm (Figure 1). We speculate that positive curvature at the protrusion’s base was first stabilized by proteins containing seven-blade ...
Plant cell wall Composition
... cell wall, in multicellular organisms, is to act as a pressure vessel, preventing overexpansion when water enters the cell. In other word the creation of a stable osmotic environment by preventing osmotic lysis and helping to retain water. It permits the organism to build and hold its shape (morphog ...
... cell wall, in multicellular organisms, is to act as a pressure vessel, preventing overexpansion when water enters the cell. In other word the creation of a stable osmotic environment by preventing osmotic lysis and helping to retain water. It permits the organism to build and hold its shape (morphog ...
The origin of the eukaryotic cell: A genomic investigation
... small ribosomal RNA and a host of proteins have identified this cell as being an extremely early-diverging eukaryote (4). The loss of about 567 proteins as one brings Giardia into the search for ESPs is caused by the absence of a mitochondrion in Giardia and to the simplification of cellular structu ...
... small ribosomal RNA and a host of proteins have identified this cell as being an extremely early-diverging eukaryote (4). The loss of about 567 proteins as one brings Giardia into the search for ESPs is caused by the absence of a mitochondrion in Giardia and to the simplification of cellular structu ...
MicroHypothesis From pre-cells to Eukarya – a tale of
... of the pre-cells, while the trunk evolution of the whole precell population continued (Fig. 1). Specifically, Kandler assumes the bacterial lineage to have diverged first at a pre-cell stage PC-1 to embark on its own separate evolutionary path, while the trunk evolution of pre-cells continued. There ...
... of the pre-cells, while the trunk evolution of the whole precell population continued (Fig. 1). Specifically, Kandler assumes the bacterial lineage to have diverged first at a pre-cell stage PC-1 to embark on its own separate evolutionary path, while the trunk evolution of pre-cells continued. There ...
Bacteria - Ms. Pass's Biology Web Page
... Cyanobacteria This is a group of bacteria that includes some that are single cells and some that are chains of cells. You may have seen them as "green slime" in your aquarium or in a pond. ...
... Cyanobacteria This is a group of bacteria that includes some that are single cells and some that are chains of cells. You may have seen them as "green slime" in your aquarium or in a pond. ...
Bacteria
... Cyanobacteria This is a group of bacteria that includes some that are single cells and some that are chains of cells. You may have seen them as "green slime" in your aquarium or in a pond. ...
... Cyanobacteria This is a group of bacteria that includes some that are single cells and some that are chains of cells. You may have seen them as "green slime" in your aquarium or in a pond. ...
Centrosomes as Scaffolds - Albert Einstein College of Medicine
... The centrosome appears as bodies of electron-dense material either diffused throughout the cytoplasm or specifically localized around centrioles. The centrosome serves as the cell’s MTOC, a dynamic structure that assumes different forms and locations depending on the cell cycle phase (Brinkley, 1985 ...
... The centrosome appears as bodies of electron-dense material either diffused throughout the cytoplasm or specifically localized around centrioles. The centrosome serves as the cell’s MTOC, a dynamic structure that assumes different forms and locations depending on the cell cycle phase (Brinkley, 1985 ...
Possible new intranuclear symbionts of Paramecium caudatum
... and/or internal factors. As it was seen with electron microscope, these structures don’t have ultrastructure features characteristic for so-called R-bodies of Caedibacter (Preer et al.,1966; Pond et al., 1989). There is some correlation between the presence of these structures and different variants ...
... and/or internal factors. As it was seen with electron microscope, these structures don’t have ultrastructure features characteristic for so-called R-bodies of Caedibacter (Preer et al.,1966; Pond et al., 1989). There is some correlation between the presence of these structures and different variants ...
7.2 Cell Structure
... What organelles help make and transport proteins? Proteins are assembled on ribosomes. Proteins made on the rough endoplasmic reticulum include those that will be released, or secreted, from the cell as well as many membrane proteins and proteins destined for lysosomes and other specialized location ...
... What organelles help make and transport proteins? Proteins are assembled on ribosomes. Proteins made on the rough endoplasmic reticulum include those that will be released, or secreted, from the cell as well as many membrane proteins and proteins destined for lysosomes and other specialized location ...
Skin and bones: the bacterial cytoskeleton, cell wall, and cell
... Both shape and size are important for cell function, particularly with respect to diffusion and nutrient uptake. A sphere may seem a simple shape to achieve, but its surface area to volume ratio rapidly shrinks with increased size. Meanwhile, a rod can maintain a viable ratio with greater volumes. O ...
... Both shape and size are important for cell function, particularly with respect to diffusion and nutrient uptake. A sphere may seem a simple shape to achieve, but its surface area to volume ratio rapidly shrinks with increased size. Meanwhile, a rod can maintain a viable ratio with greater volumes. O ...
Cells and Tissues Part 2
... No energy is required Active transport Cell must provide metabolic energy (ATP) ...
... No energy is required Active transport Cell must provide metabolic energy (ATP) ...
cleeks o` cytokinesis: microtubule sticks and contractile hoops in cell
... Furrow initiation requires microtubules to contact the cell cortex We have studied how the site of the initiation of furrowing depends upon the contact made by microtubules with the cortex in mutants in which microtubule stability is altered. One such mutant is in the gene orbit/mast that encodes th ...
... Furrow initiation requires microtubules to contact the cell cortex We have studied how the site of the initiation of furrowing depends upon the contact made by microtubules with the cortex in mutants in which microtubule stability is altered. One such mutant is in the gene orbit/mast that encodes th ...
Cell division in the green microalga Marvania
... the taxonomic delimitation of the order Chlorococcales. The ...
... the taxonomic delimitation of the order Chlorococcales. The ...
7-3 Cell Boundaries - River Dell Regional School District
... b. remain in high concentration outside the cell. c. move by diffusion from outside to inside the cell. d. cause water to enter the cell by osmosis. Slide 30 of 47 End Show Copyright Pearson Prentice Hall ...
... b. remain in high concentration outside the cell. c. move by diffusion from outside to inside the cell. d. cause water to enter the cell by osmosis. Slide 30 of 47 End Show Copyright Pearson Prentice Hall ...
Lesson Plans for the Animal Cell
... cell membrane - the thin layer of protein and fat that surrounds the cell. It is represented by the plastic bag. centrosome - a small body located near the nucleus - it has a dense center and radiating tubules. This is where microtubules are made. During cell division (mitosis), the centrosome divid ...
... cell membrane - the thin layer of protein and fat that surrounds the cell. It is represented by the plastic bag. centrosome - a small body located near the nucleus - it has a dense center and radiating tubules. This is where microtubules are made. During cell division (mitosis), the centrosome divid ...
ppt - Erice Crystallography 2006 IT Support
... ribosome into the density map, by a process of flexible fitting. The following two computational methods can be used: • Normal Mode Analysis-guided flexible fitting (NMFF): molecule is modeled as an elastic network (“balls connected with springs”); only small amplitudes allowed. • Real-space refinem ...
... ribosome into the density map, by a process of flexible fitting. The following two computational methods can be used: • Normal Mode Analysis-guided flexible fitting (NMFF): molecule is modeled as an elastic network (“balls connected with springs”); only small amplitudes allowed. • Real-space refinem ...
Essential fatty acids in membrane: physical properties and function
... reconstituted systems where the components of interest can be isolated and a much simplified system can be used consisting only o f the components of interest. The advantage of the latter approach is that conditions can be much more precisely set to test various aspects. It is also possible to isola ...
... reconstituted systems where the components of interest can be isolated and a much simplified system can be used consisting only o f the components of interest. The advantage of the latter approach is that conditions can be much more precisely set to test various aspects. It is also possible to isola ...
Flagellum
A flagellum (/fləˈdʒɛləm/; plural: flagella) is a lash-like appendage that protrudes from the cell body of certain prokaryotic and eukaryotic cells. The word flagellum in Latin means whip. The primary role of the flagellum is locomotion but it also often has function as a sensory organelle, being sensitive to chemicals and temperatures outside the cell. Flagella are organelles defined by function rather than structure. There are large differences between different types of flagella; the prokaryotic and eukaryotic flagella differ greatly in protein composition, structure, and mechanism of propulsion. However, both are used for swimming.An example of a flagellate bacterium is the ulcer-causing Helicobacter pylori, which uses multiple flagella to propel itself through the mucus lining to reach the stomach epithelium. An example of a eukaryotic flagellate cell is the mammalian sperm cell, which uses its flagellum to propel itself through the female reproductive tract. Eukaryotic flagella are structurally identical to eukaryotic cilia, although distinctions are sometimes made according to function and/or length.