Spectrin is a protein found in all eukaryotic cells that provide support to the

Question

Spectrin is a protein found in all eukaryotic cells that provide support to the plasma membrane. Transmembrane proteins allow large particles to pass through the membrane. Certain prokaryotes and eukaryotes adapt to changing environments by changing the unsaturated hydrocarbon tails of the plasma membrane. Animals, yeast, bacteria, and viruses contain membrane organelles Animals, yeast, bacteria contain a cell membrane organelles Reduction is gaining of H+ and oxidation is gaining of H+ Formation of macromolecules is an energetically favorable reaction that is coupled with formation of monomer, an energetically favorable reaction The breakdown of macromolecules is a spontaneous reaction Vmax is used to indicate if the substrate is binding very tightly to the enzyme. A high Vmax indicates weak binding and a low Vmax value indicates tight Activated carriers are large molecules that that contain one energy-rich covalent bonds

Explanation / Answer

Answer:

41). True

Explanation: Spectrin is a cytoskeletal protein that lines the intracellular side of the plasma membrane in eukaryotic cells. Spectrin forms pentagonal or hexagonal arrangements, forming a scaffolding and playing an important role in maintenance of plasma membrane integrity and cytoskeletal structure.

42). True

Explanation: The movements of most solutes through the membrane are mediated by membrane transport proteins which are specialized to varying degrees in the transport of specific molecule. Plasma membrane are known as protein channels and they form a way for large or charged molecules to pass through the membrane.

43). True

Explanation:

temperature related changes in membrane fluidity appear to depend on the increased solubility of oxygen in the cytoplasm at lower temperatures. Oxygen is a substrate for the desaturase enzyme system involved in the generation of unsaturated fatty acids. With more oxygen available at lower temperatures, unsaturated fatty acids are synthesized at a greater rate and membrane fluidity increases, thereby offsetting the temperature effect.

44). False

Explanation: Only animals & yeast contain membrane organelles.

45). True

All living organisms contain cell membrane around the cell.

46). True

Explanation:  Oxidation is the loss of hydrogen whereas reduction is the gain of hydrogen.

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