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- What substance joins proteoglycans together into gigantic complexes called proteoglycan aggregates? These complexes can occupy very large volumes. a. hyaluronidase b. hyaluronic acid c. proteoglycase d. fibronectin e. lamininDescribe the roles of each of the following components of the ECM: a. Collagen fibers b. Glycosaminoglycans c. Reticular fibers d. Proteoglycans e. Glycoproteins (cell-adhesion molecules) f. Elastic fibersWhich of these ECM molecules is made of hydrophobic proteins held together with intermittent covalent bonds? a. Fibronectin b. Hydrated Matrix c. Elastin d. Integrin c. Collagen
- Which protein is not a large component of the ECM? a. collagen b. elastin c. fibrillin d. actin e. lamininMucin is a glycoprotein found in mucus that increases its viscosity. Carbohydrates are added to mucin in which of these structures? A. Cytoplasm B. Golgi Apparatus C. Nucleus D. Rough endoplasmic reticulumThe image illustrates passive and active transport across the cell membrane. (Use the diagram to answer questions A-C) A. 1. Which section shows active transport?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not? B. 1. Which section shows diffusion?2. What type of solute molecules may be moved by this type of transport? C. Which of these sections are considered passive transport? Explain.
- The image illustrates passive and active transport across the cell membrane. (Use the diagram to answer questions A-D) A. 1. Which section represents facilitated diffusion?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not?5. What type of solute molecules may be moved by this type of transport? B. 1. Which section shows active transport?2. Explain why or how can you tell?3. Does the cell expend energy in this transport?4. Why or why not? C. 1. Which section shows diffusion?2. What type of solute molecules may be moved by this type of transport? D. Which of these sections are considered passive transport? Explain.The product obtained from the partial hydrolysis of collagen O A. myosin B. actin O c. gelatin O D. thrombin BCollagen represents which level of protein organization? a. Secondary b. All of the options are correct c. Tertiary d. Primary e. Quaternary
- 1. The most abundant protein found in the extracellular matrix (ECM) is A. elastin B. keratin C. collagen D. myosin 2. One type of ECM component composed of both protein and carbohydrate would be A. lectins B. proteoglycans 17 C. integrins D. claudins 3. Which types of cells don't have an ECM, but rather have something else instead? A. epithelial cells B. connective tissue cells C. white blood cells D. plant cells 4. Which ECM component allows for elastic recoil, almost like a rubber band? mit A. keratin B. recoilin C. elastin D. collagen 5. Which biologists conducted the experiment that showed that the R strain of bacteria could be converted into the S strain through transformation? A. Griffith and colleagues B. Hershey and colleagues C. Avery and colleagues D. Chase and colleagues ulA ns as beitiazacio zi smonsa sit 6. The follow up to the experiments from the previous question showed that DNA was indeed the genetic material. How was this done? A. Digesting the RNA from the extract…The strength of collagen comes from which of the following? a. hydrophobic interactions and hydrogen bonds b. crosslinking via peptide bonds c. β sheets d. crosslinking as a result of disulfide bondsWhat sort of cellular changes would you expect a sailor sick with scurvy to experience? O Their collagen (an extracellular matrix component) would be diminished, resulting in fewer binding sites for integrins. The end result would be less adherent cells. O Their collagen (a cytoskeletal fiber) would be diminished, resulting in a loss of contractile motion within the cell, affecting both cell migration and muscle function.