Transferrin is transmembrane glycoprotein, which mediates the transport of iron. Which of the following shows the correct route for the production of this membranous protein?
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- Lysosomes are involved in the following: a. Na-K-ATPase Protein Pump O b. Phagocytosis O c. Pinocytosis d. Exocytosis Oe. All of the AboveChoose the correct order of events for protein synthesis of an INTEGRAL MEMBRANE PROTEIN. 1. Translation occurs on a ribosome in the cytosol 2. Vesicle containing protein fuses with the Golgi apparatus. 3. Vesicle containing protein buds off the rough endoplasmic reticulum. 4. Vesicle containing protein fuses with the plasma membrane. 5. Transcription leads to generation of the MRNA. 6. Vesicle containing protein fuses with the rough endoplasmic reticulum. 5,1,6,4 5,3,2,4 2,6,3,4 1,6,2,4Explain how the form of each of the following structures is related to its function: a. Cilia b. Microvilli c. Intermediate filaments d. Lysosomes e. Nuclear envelope
- Cell surface proteins can carry out several functions except Select one: O a. lateral condensation O b. attachment to the cytoskeleton O c. transport O d. cell-cell recognitionWhich of the following is NOT a function of lysosomes? a. digesting particles taken in by endocytosis b. help in the formation of cell membranes c. degrading worn-out or nonfunctional organelles d. breaking down bone to release calcium ions into the bloodThe function of the lysosome is to Select one: a. remove ubiquitinated proteins b. make proteins Oc. package proteins into vesicles O d. recycle macromolecules Oe. transport proteins to the golgi
- What is the major function of lysosomes? They: A. package proteins B. detoxify toxic substances C. catalyse lipid metabolism D. digest unwanted particles within the cellA protein is synthesized on a ribosome within the rough endoplasmic reticulum. If the protein needs to be modified and packaged before export from the cell, to which structure is it sent? a. endosome b. Golgi body c. nucleus d. lysosome e. smooth endoplasmic reticulumWhere are proteins for export produced? A. Golgi apparatus B. Rough endoplasmic reticulum C. Cytoplasmic (free) ribosome D. Mitochondria E. Smooth endoplasmic reticulum
- Which of the following is a correct match between a cytoskeletal element and its function? Select one: A. microtubules and chromosome movement B. microfilaments and flagellar motility C. microtubules and cleavage furrow formation D. intermediate filaments and cytoplasmic streaming E. microfilaments and intracellular vesicle transportd Glycoproteins are placed on the surface of the cell for identification of the cell from other cells, since multiple subunits and both proteins and carbohydrates it would be produced by which of the following Select one or more: a. golgi apparatus b. polyribosomes c. rough endoplasmic reticulum Od. smooth endoplasmic reticulumWhich of the following is NOT an example of microtubule-based motility? A. ciliary movement B.contractile ring of cleavage furrow C. pigment granule transport in fish scales D.axonal transport in neurons QUESTION 33 You are studying the role of microtubules and microfilaments in cell motility. You treat fibroblasts with cytochalasin, which inhibits microfilaments, or colchicine, which inhibits microtubules, and observe the following: In controls, the cells migrate in a directed way, elongating as they go. With cytochalasin treatment, the cells completely stop migrating while with colchicine treatment, the cells attempt to migrate in several directions at once. The best conclusion for this is: A Cytochalasin prevents cell migration and colchicine prevents directed cell migration. B. Microfilaments are necessary for cell migration and microtubules are necessary for directionality of migration. C. Microfilaments are necessary for cell migration and microtubules are sufficient for…