Question at position 31 Match the term with its definition: integral protein Water-fearingA protein that is firmly inserted into the lipid bilayer and fill the whole thickness of the membraneWater-lovingA protein that is not embedded in the lipid bilayer

Question

BlackTom AI · Accepted Answer

The question asks to match terms with their definitions for membrane proteins. 
Option 1: 'Water-fearing'. This seems to be a descriptor, not a full definitional match. In membrane biology, 'water-fearing' (hydrophobic) describes a property of the lipid bilayer core, not a type of protein by itself, so as a standalone definition it is incomplete. 
Option 2: 'A protein that is firmly inserted into the lipid bilayer and fill the whole thickness of the membrane'. This precisely describes an integral (intrinsic) membrane protein, which spans the membrane and extends through its entire thickness, anchored by hydrophobic interactions with the lipid core. It is the canonical definition for an integral protein. 
Option 3: 'Water-loving'. This mirrors the term hydrophilic. While hydrophilic describes a characteristic of regions of proteins or domains that interact with water, it does not define a membrane protein type by itself, so this is not the correct match for the given definition. 
Option 4: 'A protein that is not embedded in the lipid bilayer'. This describes peripheral or extrinsic membrane proteins, which are loosely associated with the membrane surface rather than spanning it. It contradicts the idea of being embedded and spanning the bilayer, so it does not fit the provided definition. 
Overall, the term-definition pair that aligns with the definition 'A protein that is firmly inserted into the lipid bilayer and fill the whole thickness of the membrane' is the integral membrane protein concept, while the other options either describe properties (water-fearing/water-loving) or different classes of proteins (peripheral) that do not match the full spanning definition.

Question at position 31 Match the term with its definition: integral protein Water-fearingA protein that is firmly inserted into the lipid bilayer and fill the whole thickness of the membraneWater-lovingA protein that is not embedded in the lipid bilayerSingle choice

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