H 4 4 Test Lecture 3 Help Save E which of the following fact

H 4 4 Test (Lecture 3) Help Save E which of the following factors could cause the cell membrane to become less permeable? 25 Multiple Choice O if the channel proteins were to denature and become inactive if the molecules trying to enter the cell were decreased in size if the hydrophilic head of the phospholipids were to become hydrophobic while the hydrophobic tails become hydrophic if the size of the protein channel was to increase

Solution

25.The correct answer is :If the hydrophilic head of phospholipids become hydrophobic while the hydrophobic tails become hydrophilic.

Reason: Hydrophilic heads face outwards and hydrophobic tails face to interior that allow for cell permeability.

24.The correct answer is : sodium /potassium pump

Reason:Sodium /potassium pump is an active transport process that requires ATP.

23.The correct answers are all the options.

Reason: All the options are related to active transport.

22.The correct answer is : none of the above

Reason: The correct answer is diffusion.

21. The correct answer is :molasses will become more dilute.

Reason: Water will move across by the process of osmosis as a result of which molasses will become more dilute.

Osmosis can occur when a membrane is semipermeable.

Reason: Osmosis occurs through semi permeable membrane.

8.The correct answer is :Cells produce useful secretions this increases their concentration and more will diffuse out of the cell.

Reason: Oxygen requirement by the cell and removal of wastes required continuous back and flow of substances across the cell membrane.