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Structure and Composition of Cell Membrane
Despite differences in structure and function, all living cells in multicellular organisms are surrounded by a cell membrane. Just like the outer layer of the skin separates the body from its environment similarly, the cell membrane, also known as 'plasma membrane,' separates the inner content from its exterior environment.
Cell Membrane
The cell membrane is known by different names like plasma membrane or cytoplasmic membrane, or biological membrane. The term "cell membrane" was first introduced by C. Nageli and C. Cramer in the year 1855. Later on, in 1931, the term "plasmalemma" for cell membrane was given by J. Plowe. The cell membrane separates the cell's internal environment from the extracellular space. This separation allows the protection of cells from their environment.
Prokaryotes vs Eukaryotes
The cell is defined as the basic structural and functional unit of life. The cell membrane bounds it. It is capable of independent existence.
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- THANK YOU PO NG MARAMI 11. which of the following describes a protoplasm? I. Membrane-bound structure II. Fluid content of the cell III. Synonymous to the term cytosola. l,llb. ll,lllc. l,ll,llld. l,lll 12. What is the initial component of the protoplasm? a. mitochondriab. cytoplasmc. plastidsd. nucleus13. In reference to answer on number 12 what is its function?a. connects two plant cellsb. maintains the shape of the cellc, suspend the organellesd. produce proteins for the cell14. Which of the following describes the metabolism property of protoplasm?a. stores substances for the organellesb. processes genetic informationc. modifies proteins and lipidsd. utilizes degradative chemical reactions that break down complex molecules15. which of the following describes the metabolism property of protoplasm?a. glycosidesb. calcium oxalatec. alkaloidsd. cystoliths1. Identify features that are present in eukaryotic cells but not in prokaryotic cells. Select all that apply. 2. What part of all cells encases the cytoplasm and forms a boundary between the cell interior and cell exterior? 3. What structure is found in plant cells but not in animal cells? 4. In plant cells, what structure lies just outside the cell membrane and provides strength and support to the plant cell? 5. What structure found in plant cells is an organelle for storing water and metabolites? 6. Identify the features common to all cells. 7. Identify the features present in animal cells.Question- For each characteristic choose the cytoskeleton components to which it applies. either a. intermediate filament b. microtubles c. actin select all that apply 1. found in cell cortex 2. contain coiled coils 3. binds atp 4. provides high tensile strength 5. functions in mitosis 6. assiciated with tubulin 7. roplike 8. treadmilling growth 9. binds gtp 10. stablized by capping proteins 11. associated w/severing proteins 12. found in cilia 13. highly stable 14. comprised of photofilaments 15. has a posivite and negative end 16. functions in cell to cell junctions 17. dynamic instability 18. assoicated with centrosomes 19. found in microvilli 20. associated with chromatin
- 13. cytoplasm? what is its function?a. connects two plant cellsb. maintains the shape of the cellc, suspend the organellesd. produce proteins for the cell14. Which of the following describes the metabolism property of protoplasm?a. stores substances for the organellesb. processes genetic informationc. modifies proteins and lipidsd. utilizes degradative chemical reactions that break down complex molecules15. which of the following describes the metabolism property of protoplasm?a. glycosidesb. calcium oxalatec. alkaloidsd. cystolithsQuestion: A cell membrane is ______________? a. Permeable b. Semipermeable c. Nonpermeable d. None of the above.Answer Guide Question: a) What characteristics does golgi apparatus have to be considered as the packaging center of the cell? b) How do flagella propel? Where do its energy source located? c) What do you mean by a power house? What is being broken down by mitochondrion to release energy?
- Identification: 1. A hard material in the cellulose matrix of the cell wall important for support and protection from microorganisms. 2. The cementing substance of the middle lamella that functions to “glues” cells together to form tissues. 3. The cell wall component present in mature cells primarily functioning for support. 4. These are gaps in the cell wall where cytoplasm of one cell extends to neighbouring cells. 5. The membrane lipid component that gives fluidity to the plasma membrane. 6. The membrane protein component that serves as channels and ion pumps within the cell membrane. 7. A group of protein compounds that serves as chemical catalyst within the cytoplasm. 8. It refers to the single membrane enclosing the vacuole. 9. Communication between the cytoplasm and the nucleoplasm is provided for by this part of the nucleus? 10. Which kind of endoplasmic reticulum is most abundant in epidermal cells producing waxes/cutin. 11. It refers to the vesicle…give 3 function of the cell membrane and (a) tell which component of the cell membrane enable it to perform this function? (each of the 3 function) (b) tell how do these components help the cell membrane in performing this function? (each of the 3 function). plsssssss help me answer this question, thank you.Q1. You are required to design a carbon-based, eukaryotic, unicellular organism that contains membrane-bound organelles that match those on Earth. Describe specific structures and components that you would include in the cell wall, plasma membrane and internal cell membranes of your cell that would assist the cell's survival in the low temperatures and high pressure experienced on Kepler-28d. Specfically, mention what can be added to internal cell membranes, structure wise and components (200 words maximum)
- Cytoplasmic streaming in plants… Question options: is the unidirectional movement of the cytoplasmic material around the central vacuole of the cell. creates a whip-like motion used for motility in organisms such as Euglena sp. is the beating back and forth of short microtubules dispersed around the cell to create motion (e.g. Paramecium sp.). pushes the cytoplasm to one end of the cell and causes the plasma membrane to extend outward as a pseudopod.14. Design an experiment to determine how tightly epithelial cells are connected through cell adhesions. What would you expect with a starch molecule vs. glucose molecule?1. Estimate the maximum turgor pressures (Ψp) inside the cells of leaves and flowers. 2. Which structure (leaves or flowers) have stiffer, more rigid cell walls? What part(s) of the graphs tell you this? 3. At about what relative cell volume (equal to relative water content) does incipient plasmolysis occur for each structure? 4. Which structure (leaves or flowers) has more solutes inside the cells? 5. Which structure (leaves or flowers) do you expect to undergo more shrinking and swelling in volume with changes in water content? 6. Imagine you wanted to display a C. speciosa shoot in a vase in your house. You cut a flowering shoot (a shoot with both leaves and flowers on it) from a tree growing outside. You then transport the shoot into your house. As you carry it, the leaves and flowers are evaporating water. By the time you place the shoot in the vase of water, the relative water content (equivalent to relative cell volume) of the leaves and flowers has declined to…