Cell Membrane Structure and Functions Quiz

<p>Their hydrophilic heads are attracted to water, while their hydrophobic tails are repelled by water (B)</p> Signup and view all the answers

<p>The membrane is rigid and inflexible (C)</p> Signup and view all the answers

<p>To create a barrier that prevents the passage of polar molecules (B)</p> Signup and view all the answers

<p>A double layer of phospholipids with hydrophilic heads facing the outside of the cell and hydrophobic tails facing the inside (D)</p> Signup and view all the answers

<p>Monotopic protein (D)</p> Signup and view all the answers

<p>Glycoprotein (C)</p> Signup and view all the answers

<p>They enhance the structural integrity of the membrane. (C)</p> Signup and view all the answers

<p>When a carbohydrate attaches to a lipid molecule. (B)</p> Signup and view all the answers

<p>Electron microscope (A)</p> Signup and view all the answers

<p>Monotopic protein (A)</p> Signup and view all the answers

<p>Acting as recognition sites for cells. (D)</p> Signup and view all the answers

<p>It appears as a line under a light microscope. (D)</p> Signup and view all the answers

<p>Peripheral protein (D)</p> Signup and view all the answers

<p>Phospholipids and cholesterol (B)</p> Signup and view all the answers

<p>Proteins and glycolipids (D)</p> Signup and view all the answers

<p>Peripheral proteins are attached to the membrane surface, while integral proteins span the entire membrane. (D)</p> Signup and view all the answers

<p>The phospholipid molecule is amphipathic, meaning it has both hydrophilic and hydrophobic properties. (C)</p> Signup and view all the answers

<p>Cholesterol provides structural rigidity to the membrane. (D)</p> Signup and view all the answers

<p>Transport proteins (D)</p> Signup and view all the answers

<p>Receptor proteins bind to specific signaling molecules and initiate a cellular response. (B)</p> Signup and view all the answers

<p>Glycoproteins act as markers that allow cells to identify each other. (C)</p> Signup and view all the answers

<p>Hydrophilic components are facing towards the exterior of the membrane. (C)</p> Signup and view all the answers

<p>Concentration gradient (A)</p> Signup and view all the answers

<p>It specifically pertains to the movement of water. (A)</p> Signup and view all the answers

<p>Perfume molecules spread from high concentration to low concentration. (A)</p> Signup and view all the answers

<p>Osmosis only deals with water movement. (D)</p> Signup and view all the answers

<p>It occurs without the assistance of a membrane. (C)</p> Signup and view all the answers

<p>Active transport requires energy input from the cell. (B), Active transport can occur against a concentration gradient. (C)</p> Signup and view all the answers

<p>It actively transports Na+ out of the cell and K+ into the cell using ATP. (B)</p> Signup and view all the answers

<p>It directly energizes the movement of ions or molecules across the membrane. (D)</p> Signup and view all the answers

<p>It results in the movement of particles from high to low concentration. (A)</p> Signup and view all the answers

<p>Facilitated diffusion involves assistance from proteins to move larger molecules. (C)</p> Signup and view all the answers

<p>The cell volume will decrease. (B)</p> Signup and view all the answers

<p>Relies on transmembrane proteins to transport molecules. (C)</p> Signup and view all the answers

<p>The cell will shrink. (D)</p> Signup and view all the answers

<p>Water molecules move from an area of low solute concentration to an area of high solute concentration. (A)</p> Signup and view all the answers

<p>Facilitated diffusion (A)</p> Signup and view all the answers

A protein that is anchored to one side of the cell membrane, such as a glycoprotein.

A lipid molecule that holds monotopic proteins in place on a membrane.

A protein that associates with the membrane but is not embedded, often interacting with integral proteins.

A protein with carbohydrate chains attached, involved in cell recognition and signaling.

A model describing the structure of cell membranes, where lipids and proteins can move freely within the layer.

A molecule that helps maintain the fluidity and integrity of the cell membrane.

Lipids with carbohydrate chains that contribute to cell membrane structure and interactions.

A powerful microscope that provides high-resolution images of cell structures, including membranes.

The barrier that surrounds the cell, composed of a lipid bilayer with embedded proteins and other molecules.

The structure of the cell membrane composed of two layers of phospholipids.

A molecule made of a hydrophilic head and two hydrophobic tails that forms the bilayer.

The part of a phospholipid that is attracted to water.

The parts of a phospholipid that repel water.

Large molecules, such as proteins and lipids, that make up the membrane.

Substances that are attracted to water and can dissolve in it.

Substances that repel water; not soluble in water.

Proteins that span across the plasma membrane, involved in transport and communication.

Proteins that are attached to one side of the membrane; they do not span it.

A type of integral protein that spans the entire membrane.

A complex protein structure formed by the assembly of multiple polypeptide chains.

A type of lipid that is important for membrane fluidity and stability.

Movement of particles from high to low concentration without energy use.

Process that moves molecules against a concentration gradient using energy.

Adenosine triphosphate; the energy currency of the cell.

A protein that pumps sodium out and potassium into cells using ATP.

Movement of molecules across a membrane via a protein, no energy needed.

The movement of molecules from high concentration to low concentration without energy.

A type of diffusion where water moves across a semi-permeable membrane from high to low concentration.

The difference in concentration of a substance between two areas.

A membrane that allows certain substances to pass while blocking others.

A solution with a higher concentration of solutes compared to another solution.

A solution where the concentration of water is equal inside and outside the cell, causing no net movement.