BIOCHEMISTRY
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BIOCHEMISTRY - Details
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49 questions
| 🇬🇧 | 🇬🇧 |
| It is highly fluid, dynamic structures consisting of a lipid bilayer and associated proteins. | Membranes |
| Selective membrane molecular permeability is generated through the action of specific ______ and ______. | Transporters, ion channels |
| Plasma membrane plays a key role in _______ and _______ | Cell-cell interactions; transmembrane signalling |
| Such intracellular membranes help shape many of the morphologically distinguishable structures (organelles) | Specialized compartments |
| They function as integral elements in excitation-response coupling, and provide sites of energy transduction | Localized enymes |
| This compartment constitutes two-thirds of total body water and provides a specialized environment for the cell | Intracellular fluid ICF |
| This compartment contains about one-third of total body water and is distributed between the plasma and interstitial compartments | Extracellular fluid ECF |
| Is rich in K+ and Mg2+, and phosphate is its major inorganic anion. | Internal environment |
| Is characterized by high Na+ and Ca2+ content, and Cl− is the major anion. | Extracellular fluid |
| Contains the highest ratio of protein to lipid in its membrane | Mitochondrial inner membrane |
| Concentration of Na+ in ECF | 140 mmol /L |
| Concentration of Na+ in ICF | 10 mmol/L |
| Concentration of K+ in ECF | 4 mmol/L |
| Concentration of K+ in ICF | 140 mmol/L |
| Phosphoglycerides backbone is consist of: | Glycerol-phosphate |
| Attached to the backbone of phosphoglycerides | Two fatty acids |
| The simplest phosphoglyceride | Phosphatidic acid |
| A phosphatidic acid is a | 1,2-diacylglycerol 3-phosphate |
| A key intermediate in the formation of other phosphoglycerides | Phosphatidic acid |
| The second major class of phospholipids comprises | Sphingomyelin |
| A fatty acid is attached by an amide linkage to the amino group of sphingosine, forming______ | Ceramide |
| Ceramide is formed when a fatty acid is attached to the amino group of sphingosine through what kind of linkage | Amide linkage |
| What group of sphingosine is esterified to form phosphorylcholine, sphingomyelin | Primary hydroxyl group |
| Is prominent in myelin sheaths. | Sphingomyelin |
| They are sugar-containing lipids built on a backbone of ceramide | Glycosphingolipids |