Podcast
Questions and Answers
What does the fluid mosaic model of cell membranes emphasize?
What does the fluid mosaic model of cell membranes emphasize?
- Free movement of most phospholipids and many proteins (correct)
- Covalent bonding of phospholipids and proteins
- Anchoring of all molecules to the extracellular matrix
- Immobilization of all membrane components
How does a membrane's fluidity change with a high proportion of unsaturated fatty acids?
How does a membrane's fluidity change with a high proportion of unsaturated fatty acids?
- It remains unchanged
- It solidifies
- It becomes less fluid
- It becomes more fluid (correct)
What role does cholesterol play in moderating a membrane's fluidity?
What role does cholesterol play in moderating a membrane's fluidity?
- Decreases fluidity in already fluid membranes
- Decreases fluidity in already viscous membranes (correct)
- Has no effect on membrane fluidity
- Increases fluidity in already viscous membranes
What is the function of transport proteins in cell membranes?
What is the function of transport proteins in cell membranes?
How do channel proteins differ from carrier proteins in terms of membrane transport?
How do channel proteins differ from carrier proteins in terms of membrane transport?
If diffusion does not occur due to a difference in solute concentration, what process results in a net movement of water across a membrane?
If diffusion does not occur due to a difference in solute concentration, what process results in a net movement of water across a membrane?
What type of transport proteins can move more than one solute at a time?
What type of transport proteins can move more than one solute at a time?
What process uses transmembrane receptor proteins to selectively bring in large amounts of the same solute very specifically?
What process uses transmembrane receptor proteins to selectively bring in large amounts of the same solute very specifically?
What occurs when a ligand binds to a receptor protein, causing a change in the shape of the protein?
What occurs when a ligand binds to a receptor protein, causing a change in the shape of the protein?
Which type of proteins can move solutes towards higher concentration using metabolic energy?
Which type of proteins can move solutes towards higher concentration using metabolic energy?
What process involves assemblages of molecules being brought into a cell and can create large vesicles to bring in large amounts of material?
What process involves assemblages of molecules being brought into a cell and can create large vesicles to bring in large amounts of material?
What type of transport allows cells to constantly transport many different solutes at the same time using multiple transport proteins working together?
What type of transport allows cells to constantly transport many different solutes at the same time using multiple transport proteins working together?
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