Which of the following movements across a cell membrane will likely be least affected if the synthesis of membrane-bound proteins becomes inhibited? A B с D the movement of calcium (Ca²+) ) along the concentration gradient the movement of glucose (C6H1206) against the concentration gradient the movement of water (H₂O) along the concentration gradient the movement of oxygen 2) along the concentration gradient

What is the significance of the protein-lined pits? O Protein attracts other proteins needed for ATP synthesis within the cell. Protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. The polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. Receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.

Cardiac muscle cells undergo a great deal of physical stress during contraction in order to pump blood throughout your body. Which of the following would you expect to see present in relatively large numbers within their plasma membranes to counter that physical stress acting like Velcro? O transport proteins O tight junctions O desmosomes O glycolipids O cholesterol

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

A cell creates a H+ gradient across a membrane- in other words, a situation is created were the concentration of H+ is higher on one side then the other of a membrane. How can this H+ concentration gradient be used to do work (that the cells needs to do)?

The diagram below shows three different proteins embedded in a cell membrane, as well as the concentration gradient surrounding the cell high concentration channel protein carrier protein lipid bilayer 1 21 3 low concentration 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 co entration gradient without needing hic energy molecules The process labeled 3 shows how cells use energy to facilitate the active transport of molecules against the concentration gradient All three processes show how molecules freely move in and out of the cell regardless of the concentration gradient or available en Previous

Diatomic oxygen (O2) exhibits which of the following membrane transport movements? A. it is not able to cross the membrane by passive transport, because it is big, polar, and inorganic it is not able to cross the membrane by active transport, because it is big, polar, and inorganic it is able to cross the membrane by facilitated diffusion, because it is small, polar, and organic it is able to cross the membrane by active transport, because it is big, nonpolar, and organic it is able cross the membrane by simple diffusion, because it is small, nonpolar, and inorganic

Which of the following is most likely to pass through the cell membrane via facilitated diffusion? A B с D a polar molecule moving against the concentration gradient a nonpolar molecule moving along the concentration gradient a nonpolar molecule moving against the concentration gradient a polar molecule moving along the concentration gradient

SIDE A SIDE B 5 g Glucose 0g Sucrose 100 mL Water jinarnitoij - 0.20M 0g Glucose 5 g Sucrose 100 mL Water Linannitol) 0.20 M Side A Side B How would you describe the level of water (the membrane is permeable to glucose but not permeable to sucrose) in this experiment after 5 days? Multiple Choice water level will be higher on side B water level will stay the same on both sides water level will be higher on side A water level will decrease on both sides

A hypothetical molecule X+ is important for cell function and is present outside of a cell. List the factors that that will perdominantly influence the ability of molecule X to cross the membrane and enter the cell.