Which of the following statements correctly states the process shown in the diagram? O The process labeled 1 shows how cells can easily move molecules with the concentration gradient using high energy molecules. The process labeled 2 shows how cells move molecules against the concentration gradient without needing high energy molecules The process labeled 3 shows how cells use energy to facilitate the active transport of molecules against the concentration gradient O All three processes show how molecules freely move in and out of the cell regardless of the concentration gradient or available en OO

The following table depicts the rate of transport of a molecule into a cell as the external concentrations are changed. Based on what you know about the characteristics of membrane transport, the molecule is most likely transported by: a) passive transport b) simple diffusion across the membrane c) facilitated diffusion d) active transport

Which of these can never cross the lipid bilayer without the help of a transporter or a channel? O CO2 O 02 O water O Na+ O all of the above can diffuse through the lipid bilayer without transporter proteins or channels

The binding of sodium ions (Na+) to a membrane protein is one of the first steps in initiation of the sodium-potassium pump that moves these ions across the membrane. The picture shows the inital set up in this process. How does the protein get the energy needed to continue the process of moving the (Na+) across the cell membrane? Membrane Protein ONa+ Inside the Cell A. O O Nat oc Outside the Cell Con Mitochondria will attach to the protein and provide the energy to push the Na+ through the protein. Energy from ADP is released and a channel in the membrane protein permanently B. opens, resulting in the passage of the Nat. Energy produced from the difference in solute concentration on both sides of the O c. membrane pulls the Na+ through the protein. Con с ATP attaches to the protein and releases a phosphate, making energy available to OD. change the shape of the protein and allowing the passage of the Nat.

What is the role of lysozyme and a low ionic strength extraction buffer? Select all that apply. Cells absorb water from a low ionic strength extraction buffer, by osmosis, swell and lyse, releasing their contents Lysozyme breaks down bonds in the cellulose cell wall of plants, weakening the structure Cells release water into a low ionic strength extraction buffer by osmosis, shrink and lyse, releasing their contents Lysozyme is an enzyme found in lysosomes in cells Lysozyme breaks down bonds in the peptidoglycan cell wall of bacteria, weakening the structure Lysozyme is an antibiotic found in tears, saliva, human milk and mucus.

Mark the flow of water with an arrow for cells that have been placed in solutions of differing tonicity. Indicate what will happen to a plant and animal cell under each of these conditions. Direction of osmosis Plant cell Animal cell shape shape minor swelling The solute concentration outside the cell is isotonic (or equal) to the inside of the cell. No change swelling and lysis plasmolysis crenation Reset Zoom (a) Outside isotonic The solute concentration outside the cell is hypertonic to the inside of the cell. (b) Outside hypertonic The solute concentration outside the cell is hypotonic to the inside of the cell. (c) Outside hypotonic Oo Solute Cytosol ©2018 McGraw-Hill Education. Check m

So when a cell is in electrochemical equilibrium I know for Cl there is no net movemnet because the electrical and concentration gradients have an equal effect. I also know that when K is an electrochemical equilibrium that the concentration effect is bigger than the electrical effect. Which effect is greater for Na when it is in electrochemical equilibrium the electrical or concentration gradient??

meen State one way the two molecules could differ that would explain the difference in their ability to pass through the artificial plant cell membrane

So I know that Dapagliflozin is a inhibitor of the sodium glucose cotransporter so does Dapagliflozin cause glucose to just stay in the cell or does it cause glucose to exit the cell? Also if does cause glucose to exit the cell is this a passive or active process. I would think that it would be passive since the glucose is going from high to low?? So is it faciliated passive diffusion?? Please help I am not sure if I am on the right track or not I could be totally wrong so please correct me.

You have genetically modified a cell to have a thicker membrane than normal (25nm).  To keepyour cells alive, you need to understand how diffusion of nutrients works. What is the flux ofglucose through the cell membrane given that: -The concentration of glucose in the media is 10mM -The concentration of glucose inside the cell is 2mM -The diffusivity of glucose is 6x10-10m2/s