explain selective permeability and how cells achieve it
explain selective permeability and how cells achieve it
Homework Answers
Selective permeability is the property that only certain ions or molecules can pass through the cell membrane ( that is moving in and out of the cell ) this is achieved with using ion channels which allow the movement of particular ions, carriers which allow the movement of particular molecules across the membrane in one particular direction so that no other molecules can move into and out of the cell.
1) Describe how the structure of the bacterial cytoplasmic membrane relates to its function of selective...
1) Describe how the structure of the bacterial cytoplasmic membrane relates to its function of selective permeability. Ipt 2) Most antibacterial drugs disrupt or destroy bacterial cellular characteristics that are different from those of eukaryotic cells or that may not even be present in eukaryotic cells, an idea termed 'selective toxicity'. List and describe at least two cellular features of bacteria that could be targeted to inhibit or kill a bacterial pathogen lpt
Explain how aquaporin is selective for water and does not allow ions to diffuse through.
Explain how aquaporin is selective for water and does not allow ions to diffuse through.
Figure 1 represents a plasma membrane and molecules present on either side. Figure 1. A...
Figure 1 represents a plasma membrane and molecules present on either side.
Figure 1. A model of a plasma membrane demonstrating selective permeability
(a) Describe the biological need for cells to be surrounded by a membrane that is selectively permeable for different materials.
(b) Explain how the model shows selective permeability of the membrane to specific ions.
(c) Describe the characteristics of the phospholipid bilayer that permit small hydrophobic lipid molecules to pass directly across the membrane.
(d)...
Special channels called aquaporins allow water to move between cells. These channel proteins are selective- they...
Special channels called aquaporins allow water to move between cells. These channel proteins are selective- they freely let water molecules through the membrane but NOT ions or other molecules- but (like leak channels) are not gated.Based on those facts, state which of the following would be the most likely to determines the direction (and how quickly) water can move across a membrane using aquaporins, and (in a few sentences) explain your answer. how much ATP is present inside the cell...
Explain how hospitals can achieve the same quality levels as highreliability organizations. Explain how hospitals can...
Explain how hospitals can achieve the same quality levels as highreliability organizations. Explain how hospitals can achieve the same quality levels as high reliability organizations
Selective and Differential media used in the laboratory: • Define selective media and use a particular...
Selective and Differential media used in the laboratory: • Define selective media and use a particular medium as the example to explain how it works – Lecture 2 – slides 13, 14 and notes • Define differential media and use a particular medium as the example to explain how it works
Separation of most blood cells is difficult, if not impossible, to achieve because they have similar...
Separation of most blood cells is difficult, if not impossible, to achieve because they have similar properties and/or densities. What procedure is used to separate T-cells of the immune system from the many other different types of white blood cells or spleen cells? What feature of the T-cell facilitates the isolation protocol? Describe how this procedure is performed.
explain the basis for selective formation of the product 6. Explain the basis for the selective...
explain the basis for selective formation of the
product
6. Explain the basis for the selective formation of the product shown over the alternative product. CH CO2CH3 C150ccEncuzcn1.01 CH,O,CCCH2CH2CH2OH not - CIL o 2.7.1 (b) H C CH3 H3CCH; H:C, CH, RCO3H I versus Versus a yo (88%) (12%) (c) H2B2 Н4С., HC-N ) + BH preferred to V GR- HC" H Hº CH3 CH3 CH3 1 2.7.ga 179 H OH HOH PROBLEM LAIH aZcH₃ ach rather than a a...
C. Explain how microbes are classified on the basis of oxygen requirements D. Name and explain...
C. Explain how microbes are classified on the basis of oxygen requirements D. Name and explain the uses for at least four elements needed for microbial growth E. Describe the formation of biofilms F. Justify the use of each of the following: anaerobic techniques, living host cells, selective and differential media.
Explain how the selective induction of either Phase I (oxidative enzymes - e.g., cytochrome P-450) or...
Explain how the selective induction of either Phase I (oxidative enzymes - e.g., cytochrome P-450) or Phase II (conjugative enzymes - e.g., glutathione transferase) enzymes can increase the toxicity of some chemicals while decreasing the toxicities of others
1) Describe how the structure of the bacterial cytoplasmic membrane relates to its function of selective permeability. Ipt 2) Most antibacterial drugs disrupt or destroy bacterial cellular characteristics that are different from those of eukaryotic cells or that may not even be present in eukaryotic cells, an idea termed 'selective toxicity'. List and describe at least two cellular features of bacteria that could be targeted to inhibit or kill a bacterial pathogen lpt
Figure 1 represents a plasma membrane and molecules present on either side.
Figure 1. A model of a plasma membrane demonstrating selective permeability
(a) Describe the biological need for cells to be surrounded by a membrane that is selectively permeable for different materials.
(b) Explain how the model shows selective permeability of the membrane to specific ions.
(c) Describe the characteristics of the phospholipid bilayer that permit small hydrophobic lipid molecules to pass directly across the membrane.
(d)...
explain the basis for selective formation of the
product
6. Explain the basis for the selective formation of the product shown over the alternative product. CH CO2CH3 C150ccEncuzcn1.01 CH,O,CCCH2CH2CH2OH not - CIL o 2.7.1 (b) H C CH3 H3CCH; H:C, CH, RCO3H I versus Versus a yo (88%) (12%) (c) H2B2 Н4С., HC-N ) + BH preferred to V GR- HC" H Hº CH3 CH3 CH3 1 2.7.ga 179 H OH HOH PROBLEM LAIH aZcH₃ ach rather than a a...
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