
Plasma Membranes
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10 questions
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- Q1Which component of the plasma membrane is primarily responsible for its fluidity and flexibility?Nucleic acidsCarbohydratesPhospholipidsProteins30s
- Q2What is the primary function of cholesterol within the plasma membrane?To store genetic informationTo provide structural supportTo act as a channel for ionsTo regulate membrane fluidity30s
- Q3Which protein type primarily facilitates the movement of substances across the plasma membrane?Transport proteinsEnzymatic proteinsReceptor proteinsStructural proteins30s
- Q4What is the term for the movement of water across a selectively permeable membrane?Active transportFacilitated diffusionDiffusionOsmosis30s
- Q5Which of the following best describes the fluid mosaic model of the plasma membrane?A rigid, static structureOnly composed of lipidsA flexible combination of phospholipids and proteinsA single layer of molecules30s
- Q6What role do glycoproteins play in the plasma membrane?They assist in cell recognition and communicationThey anchor the membrane to the cytoskeletonThey provide energy for the cellThey serve as channels for molecules30s
- Q7Which process describes the engulfing of large particles by the plasma membrane to form a vesicle?ExocytosisPinocytosisReceptor-mediated endocytosisPhagocytosis30s
- Q8What is the primary purpose of the sodium-potassium pump in the plasma membrane?To maintain the electrochemical gradientTo synthesize proteinsTo generate ATP directlyTo facilitate glucose transport30s
- Q9What is the function of membrane potential in cells?To facilitate protein synthesisTo store nutrientsTo break down waste productsTo create a voltage difference across the plasma membrane30s
- Q10Which type of transport does not require energy to move substances across the plasma membrane?ExocytosisPassive transportEndocytosisActive transport30s