re 3.1 Animation: The Plasma Membrane Peripheral protein Cholesterol Integral protein Glycoprotein Hydrophilic head Hydrophobic tail

Cholesterol maintains the fluidity and stability of membranes at different temperatures. Cholesterol, therefore, ensures that the lipid bilayer Is always packed firmly Always has sugar molecules Is always moving Is destroyed

Which of the following types of molecules can never move across the phospholipid bilayer of a cell membrane by simple diffusion? Group of answer choices Steroids Fats Lipids Ions

Protein Structure and Function A common strategy in the regulation of protein function is to alter its structure. Describe two specific strategies used by the cell to alter a protein’s structure, thereby altering its function.

ans. part b

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