1. How is the cell membrane similar to a plastic bag with tiny holes? 2. What two components make up the cell membrane? a. What are their functions? 3. What is the fluid mosaic model?
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- For each of the following scenarios please describe which part of the cell theory is supported by this evidence. Options: • • • Cells come from preexisting cells, cells are the basic unit of life, all living things are made of cells 1. A botanist (plant scientists) named Schlieden studied a large variety of plant cells under the microscope and found that all plants were made of cells. Option 1 2. A scientist named Leeuwenhoek found that after studying a wide variety of organisms the smallest living organism he observed was made of only one cell. Option 1 3. A scientist named Virchow viewed cells under a microscope and found that cells would grow and split into new cells. Option 1 4. A zoologist (animal scientist) looked at a large amount of different animal tissues under a microscope and found that all animals are made of cells. Option 1 5. Robert Hooke studied cork and many other substances and found that they contained little square boxes he called cells. Option 11) Why can cell membranes be polar? What does polar mean? 2) What are the basic cytoskeletal components of a cell? What does an animal cell have that no other cell has in the cytoskeleton?IDENTIFICATION: 1. The organelle where vesicles that form the new cell plate are formed? 2. These are gaps in the cell wall where cytoplasm of one cell extends to neighbouring cells? 3. The membrane protein component that serves as channels and ion pumps within the cell membrane?
- account_circle Science Anatomy and PhysiologyQ&A LibraryWhich of the following statements regarding the selective permeability of the lipid bilayer is FALSE? A. the permeability of the lipid bilayer to different substances varies. B. The lipid bilayer component of the plasma membrane is highly permeable to nonvolatile molecules such as oxygen. C. The more hydrophobic or lipid soluble a substance is, the greater the lipid bilayers permeability to that substance. D. The lipid bilayer component of the plasma membrane is moderately permeable to ions and large, uncharged polar molecules Which of the following statements regarding the selective permeability of the lipid bilayer is FALSE? A. the permeability of the lipid bilayer to different substances varies. B. The lipid bilayer component of the plasma membrane is highly permeable to nonvolatile molecules such as oxygen. C. The more hydrophobic or lipid soluble a substance is, the greater the lipid bilayers…i. Why are carbon, nitrogen, oxygen, and hydrogen the most abundant elements in living matter and, therefore, considered macronutrients? ii. Explain the Fluid Mosaic membrane model of plasma membrane structure. iii. What is the difference between simple diffusion, facilitated diffusion, and active transport? :=PART B: Vesicular Transport D plasma membrane nuclear envelope C ENDOCYTOSIS endoplasmic reticulum transport vesicles EXOCYTOSIS A В CYTOSOL Golgi apparatus Q-6. Choose from the following terms to label A, B, C, & D. EXTRACELLULAR SPACE [Not all of the terms are used] cis-Golgi, early endosome, late endosome, lysosome, medial cisterna, peroxisome, trans Golgi A: B: C: D:
- Which of the following is/are true about the Cellular Membrane Structure: A. All membranes from plants, animals and microorganisms have similar biomolecular ultrastructure but varies in the types of lipids found. B. All membranes examined that have 2 dark-staining layers in the electron microscope indicated the presence of a layer exposed to the outer cell surface and another facing the cytiplasmic layer. C. The plasma membrane of cells are seen as thin, rigid, gel-like structure that is around 5-10nm thick. D. Some membranes have more protein components and some have similar percentage composition as the lipids. A, B, C only B, C, D only A, C, D only A, B, D onlyState the functions of each of the following cell membrane processes. 1. mosaicity 2. fluidity 3. self-healing 4. cytoskeletal fencing 5. lipid raftsMembrane proteins are key components of a typical cell membrane. Explain the importance of the proteins inside membranes to the cell membrane itself, and overall life. Include a diagram that illustrates . Your labelled diagram needs to show two different types of transport proteins embedded within a typical cell 1. membrane. 2. Serine is an uncharged, polar amino acid (below and left). Threonine (below and right) is another uncharged, polar amino acid. Illustrate the hydrolysis of a dipeptide that was made from these two amino acids. Be sure to write all involved reactants and products in the structural form like Serine, and as a proper chemical equation; e.g. reactant(s) - product(s). Your diagram of the dipeptide must show the N-terminal and C-terminal ends at opposite sides of the dimer molecule, and you need to indicate where the peptide bond is with an arrow/highlighter. „H C-N OH NH2 но CH — CH -с-соон он H
- MAIN IDEA: Eukaryotic cells have an extensive and dynamic framework called a cyto- skeleton. The cytoskeleton is used for cell shape, internal structure, movement, and cell division. Many cells are surrounded by and supported by a complex extracellular matrix and are able to interact with adjacent cells and the environment via cell junctions. 3. List three common components of microtubules and microfilaments. 6. Complete the paragraph to describe how organelles help cells and cell contents move around. _j help to move cell components, such as a cell's during cell division. They rapidly assemble strengthen duplicated hen needed and then disassemble. and change the shape of a eukaryotic cell. In this way they can help the cell move. Organized arrays of are found in and of eukaryotic cells. Elongated or false feet, help in amoebas' these single-celled organisms move. - Describe four examples of extracellular matrix in different organisms.A2 Which of the following statements is NOT correct about the phospholipid molecules in the plasma membrane? * O The polar heads face outward The nonpolar tails face inward. O The polar heads are hydrophobic. O The nonpolar tails are hydrophobic. The phospholipids form a bilayer. This is a required question. what are two structural characteristics of cell membrane determine whether substances can pass through them passively? What determines whether or not a substance can be actively transported through the membrane?