Topic 4 study questions with answers

Topic 4 study questions with answers - Study questions...

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Study questions – Topic 4 Extracellular interactions Multiple choice questions (1 mark per answer) 1. The cellulose fibres in plant cell walls are synthesized. .. (a) In the rough ER, packaged by the Golgi complex, and transported to the plasma membrane in vesicles. (b) In the cytosol, and transported to the cell surface via microtubules. (c) By cytosolic enzymes that gather at the plasma membrane. (d) By enzymes that are synthesized in the rough ER, packaged by the Golgi complex and transported to the plasma membrane where they are inserted as transmembrane proteins. (e) None of the above 2. Animal cells bind to the extracellular matrix via… (a) Fibronectins in the plasma membrane (b) Collagen in the plasma membrane (c) Integrins in the plasma membrane (d) Phospholipids in the plasma membrane (e) Both a and c allow cells to bind to the extracellular matrix. 3. Proteoglycans in the extracellular matrix of animal tissues… (a) Provide tensile strength (b) Are linked to microtubules through the plasma membrane (c) Are polysaccharides that carry a negative charge and so attract water molecules (d) Provide cartilage with the ability to resist compression (e) All of the above are true of proteoglycans 4. Which one of the following statements concerning the extracellular matrix is not correct? (a) It consists of macromolecules that are synthesized and secreted by the cells it surrounds. (b) It is composed of collagen fibres inserted into a matrix of pectins and is linked to the plasma membrane by interactions between membrane integrins and the adhesive glycoprotein
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Topic 4 study questions with answers - Study questions...

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