7.06 Cell Biology EXAM #1 KEY February 28, 2006
... (iii) How does the magnitude of the membrane potential across the lipid bilayer change over time? It doesn’t. It remains at zero the whole time. Ions cannot pass through the membrane unless there is a channel, pump, or transporter that allows movement of the ion. Ions traveling through channels is w ...
... (iii) How does the magnitude of the membrane potential across the lipid bilayer change over time? It doesn’t. It remains at zero the whole time. Ions cannot pass through the membrane unless there is a channel, pump, or transporter that allows movement of the ion. Ions traveling through channels is w ...
Display of Artificial Scaffolding Proteins on Yeast Surface
... The results described above indicate that S. cerevisiae can express the recombinant scaffolding proteins derived from C. thermocellum CipA on its cell surface. However, FACS analysis of yeast strains displaying the scaffolding proteins with different numbers of cohesins indicated that the expression ...
... The results described above indicate that S. cerevisiae can express the recombinant scaffolding proteins derived from C. thermocellum CipA on its cell surface. However, FACS analysis of yeast strains displaying the scaffolding proteins with different numbers of cohesins indicated that the expression ...
Cellular Structure and Function
... The answer to these questions is clear once you know how a cell functions. To carry out life processes, a cell must be able to quickly pass substances into and out of the cell. For example, it must be able to pass nutrients and oxygen into the cell and waste products out of the cell. Anything that e ...
... The answer to these questions is clear once you know how a cell functions. To carry out life processes, a cell must be able to quickly pass substances into and out of the cell. For example, it must be able to pass nutrients and oxygen into the cell and waste products out of the cell. Anything that e ...
free medium for progeny cell division - Journal of Cell Science
... the time of onset of serum starvation. It is shown that a 1-h exposure to serum-free medium leads to a delay of the cycle times in about 50 % of cells younger than 3-4 h in the first generation (A). Furthermore, a 2 (B) or 4 (c) h exposure to serum-free medium caused a considerable intermitotic dela ...
... the time of onset of serum starvation. It is shown that a 1-h exposure to serum-free medium leads to a delay of the cycle times in about 50 % of cells younger than 3-4 h in the first generation (A). Furthermore, a 2 (B) or 4 (c) h exposure to serum-free medium caused a considerable intermitotic dela ...
Selective protein degradation: a rheostat to
... decade has brought the UPS to the forefront of plant cell-cycle research. In this review, we will summarize our knowledge of the function of the UPS in the mitotic cycle and in endoreduplication, and also in meiosis in higher plants. Keywords: APC/C, cell cycle, cullin, DNA replication, endoredupl ...
... decade has brought the UPS to the forefront of plant cell-cycle research. In this review, we will summarize our knowledge of the function of the UPS in the mitotic cycle and in endoreduplication, and also in meiosis in higher plants. Keywords: APC/C, cell cycle, cullin, DNA replication, endoredupl ...
Defining new SNARE functions: the i-SNARE
... inhibit vacuolar traffic when overexpressed. Waiting for new data about possible interactions of SYP2s and SYP5s with partners influencing membrane potential or lipid reorientation, we have to better characterize their unexpected interfering effect on vacuolar targeting. When their concentration is ...
... inhibit vacuolar traffic when overexpressed. Waiting for new data about possible interactions of SYP2s and SYP5s with partners influencing membrane potential or lipid reorientation, we have to better characterize their unexpected interfering effect on vacuolar targeting. When their concentration is ...
secretion and endocytosis in insulin
... Insulin was used to deplete the adrenalin stores of rat adrenal medulla cells. Release of secretion was observed to occur by exocytosis. In addition, during the stages of massive release of secretory granules, the insulin-treated preparations showed greatly enhanced endocytic uptake of horseradish p ...
... Insulin was used to deplete the adrenalin stores of rat adrenal medulla cells. Release of secretion was observed to occur by exocytosis. In addition, during the stages of massive release of secretory granules, the insulin-treated preparations showed greatly enhanced endocytic uptake of horseradish p ...
Cell and Molecular Biology - 外文文献下载
... Eukaryotic cells are far more complex internally than their bacterial ancestors and the cells are organized into compartments or organelles, each delineated by a membrane. The DNA of the cell is packaged with protein into compact units called chromosomes that are located within a separate organelle, ...
... Eukaryotic cells are far more complex internally than their bacterial ancestors and the cells are organized into compartments or organelles, each delineated by a membrane. The DNA of the cell is packaged with protein into compact units called chromosomes that are located within a separate organelle, ...
reading and questions: kingdom monera
... Unlike most other cells, the hereditary material of bacteria is not confined in a nucleus. (A nucleus is a membrane-enclosed structure that can be thought of as the "control center" of a typical cell.) In other words, there is no membrane separating the hereditary material from the rest of the cell ...
... Unlike most other cells, the hereditary material of bacteria is not confined in a nucleus. (A nucleus is a membrane-enclosed structure that can be thought of as the "control center" of a typical cell.) In other words, there is no membrane separating the hereditary material from the rest of the cell ...
Introduction to Physiology: The Human Body Organization of the Body
... • Urea and uric acid • Excess ions and water • Filtration occurs in the kidney by first absorbing large quantities of plasma, and then returning to the blood those substances that are of nutritional value (glucose, amino acids, water, and ions), while excess nutrients or waste products are left b ...
... • Urea and uric acid • Excess ions and water • Filtration occurs in the kidney by first absorbing large quantities of plasma, and then returning to the blood those substances that are of nutritional value (glucose, amino acids, water, and ions), while excess nutrients or waste products are left b ...
ultrastructure of endodermis and stele cells of dehydrated
... 5), with small ones 5–7 μm in diameter in phloem and 5–10 μm in xylem, and large ones 10–18 μm in diameter. Cell walls delimit their protoplasts, and numerous organelles are found in the ribosome-rich cytoplasm (Figs. 9–11). The cells are highly vacuolated (usually 2–6 small vacuoles per cross secti ...
... 5), with small ones 5–7 μm in diameter in phloem and 5–10 μm in xylem, and large ones 10–18 μm in diameter. Cell walls delimit their protoplasts, and numerous organelles are found in the ribosome-rich cytoplasm (Figs. 9–11). The cells are highly vacuolated (usually 2–6 small vacuoles per cross secti ...
Analytical tools for single-molecule fluorescence imaging in
... E. coli bacteria, namely that of a cylindrical body capped by hemispheres, with a typical diameter width of ~1 m and endto-end length in the range ~2-5 m, depending primarily on stage in the cell cycle. 7,8,16-18 Here, we define a local coordinate system from each bacterium’s position, orientation ...
... E. coli bacteria, namely that of a cylindrical body capped by hemispheres, with a typical diameter width of ~1 m and endto-end length in the range ~2-5 m, depending primarily on stage in the cell cycle. 7,8,16-18 Here, we define a local coordinate system from each bacterium’s position, orientation ...
A Family of Abundant Plasma Membrane
... To study the effects of protease and periodate and of various monosaccharides and glycoproteins (Table IV) on MAC 207 binding, a preparation of carrot microsomes containing 50 nag 1-~ protein was coated for 18 h onto microtitre plates. When the plates had been blocked by immersion in PBS containing ...
... To study the effects of protease and periodate and of various monosaccharides and glycoproteins (Table IV) on MAC 207 binding, a preparation of carrot microsomes containing 50 nag 1-~ protein was coated for 18 h onto microtitre plates. When the plates had been blocked by immersion in PBS containing ...
Electron Microscopic Observations on the Excretion of Cell
... observations seem to rule out the possibility of any plasmolysis occurring during the preparation of the vibrios for electron microscopy. It is therefore suggested that the cell-wall changes described do represent a mechanism of excretion of cell-wall material by young cholera vibrios. Micro-anatomi ...
... observations seem to rule out the possibility of any plasmolysis occurring during the preparation of the vibrios for electron microscopy. It is therefore suggested that the cell-wall changes described do represent a mechanism of excretion of cell-wall material by young cholera vibrios. Micro-anatomi ...
Humoral Response Harbors a Prominent Antigen
... several other tumor types, germ cell tumors often harbor an immune cell infiltrate that can include substantial numbers of B cells. Yet little is known about whether the humoral immune response affects germ cell tumor biology. To gain a deeper understanding of the role B cells play in this tumor fam ...
... several other tumor types, germ cell tumors often harbor an immune cell infiltrate that can include substantial numbers of B cells. Yet little is known about whether the humoral immune response affects germ cell tumor biology. To gain a deeper understanding of the role B cells play in this tumor fam ...
Cells and Their Structures
... plasma membrane Surrounds the cell; made of a double layer of specialized lipids, known as phospholipids, with embedded proteins; regulates the movement of substances into and out of the cell; also called the cell membrane. prokaryote A microscopic single-celled organism, including bacteria and cyan ...
... plasma membrane Surrounds the cell; made of a double layer of specialized lipids, known as phospholipids, with embedded proteins; regulates the movement of substances into and out of the cell; also called the cell membrane. prokaryote A microscopic single-celled organism, including bacteria and cyan ...
How and why cells grow as rods Open Access Fred Chang
... strands with a slight angular bias away from the circumferential direction [26]. In B. subtilis, similar coupling of MreB motion to cell-wall synthesis [27,28] and twisting (with opposite handedness) [26] has been observed, suggesting common rules with E. coli for establishing order within the wall ...
... strands with a slight angular bias away from the circumferential direction [26]. In B. subtilis, similar coupling of MreB motion to cell-wall synthesis [27,28] and twisting (with opposite handedness) [26] has been observed, suggesting common rules with E. coli for establishing order within the wall ...
The Electrochemical Gradient - Advanced
... ADP and inorganic phosphate. Hence, ATP synthase is both an ion channel protein and enzyme. The synthesis reaction is driven by the proton flow, which forces the rotation of a part of the enzyme; the ATP synthase is a rotary mechanical motor. Bacteria may also have a version of this enzyme, where it ...
... ADP and inorganic phosphate. Hence, ATP synthase is both an ion channel protein and enzyme. The synthesis reaction is driven by the proton flow, which forces the rotation of a part of the enzyme; the ATP synthase is a rotary mechanical motor. Bacteria may also have a version of this enzyme, where it ...
Atypical Regulation of a Green Lineage-Specific B
... understood. Together, CDKB localization at the preprophase band, the metaphase plate, and its mitotic activity suggest a role of B-type CDKs in the control of mitosis (Magyar et al., 1997; Mészáros et al., 2000; Dewitte and Murray, 2003; Lee et al., 2003). Furthermore, in rice (Oryza sativa), the ...
... understood. Together, CDKB localization at the preprophase band, the metaphase plate, and its mitotic activity suggest a role of B-type CDKs in the control of mitosis (Magyar et al., 1997; Mészáros et al., 2000; Dewitte and Murray, 2003; Lee et al., 2003). Furthermore, in rice (Oryza sativa), the ...
The DNA Damage Response Signaling Cascade
... infectious dikaryotic hypha is produced on the plant surface as a result of mating of a pair of compatible haploid budding cells. The infectious hypha or filament is composed of a single dikaryotic cell that is arrested in the cell cycle at G2 phase (Mielnichuk et al., 2009), and its formation is de ...
... infectious dikaryotic hypha is produced on the plant surface as a result of mating of a pair of compatible haploid budding cells. The infectious hypha or filament is composed of a single dikaryotic cell that is arrested in the cell cycle at G2 phase (Mielnichuk et al., 2009), and its formation is de ...
EAMCET - Botany - Sakshieducation.com
... Increase in the volume of solids due to adsorption of water to its hydrophilic colloids is called as imbibition. The pressure created in the imbibent is called as Imbibitional pressure. Diffusion of a solvent from a region of low concentrated solution to a region of high concentrated solution throug ...
... Increase in the volume of solids due to adsorption of water to its hydrophilic colloids is called as imbibition. The pressure created in the imbibent is called as Imbibitional pressure. Diffusion of a solvent from a region of low concentrated solution to a region of high concentrated solution throug ...
Lecture 07, Fungi - Cal State LA
... Cellular slime mold life cycle 2 cells may fuse into a “giant cell” (2N) that eats other amoebae as it grows ...
... Cellular slime mold life cycle 2 cells may fuse into a “giant cell” (2N) that eats other amoebae as it grows ...
Cytokinesis
Cytokinesis (cyto- + kinesis) is the process during cell division in which the cytoplasm of a single eukaryotic cell is divided to form two daughter cells. It usually initiates during the early stages of mitosis, and sometimes meiosis, splitting a mitotic cell in two, to ensure that chromosome number is maintained from one generation to the next. After cytokinesis two (daughter) cells will be formed that are exact copies of the (parent) original cell. After cytokinesis, each daughter cell is in the interphase portion of the cell cycle. In animal cells, one notable exception to the normal process of cytokinesis is oogenesis (the creation of an ovum in the ovarian follicle of the ovary), where the ovum takes almost all the cytoplasm and organelles, leaving very little for the resulting polar bodies, which then die. Another form of mitosis without cytokinesis occurs in the liver, yielding multinucleate cells. In plant cells, a dividing structure known as the cell plate forms within the centre of the cytoplasm and a new cell wall forms between the two daughter cells.Cytokinesis is distinguished from the prokaryotic process of binary fission.