Ch. 5 (Diffusion/Osmosis) and Ch. 7 (P/S) 1. What type of energy is this? •it can travel in waves ( light, sound) •it includes the random thermal motion of molecules. energy 2. This molecule : •is required for photosynthesis •diffuses across a semi-permeable membrane by osmosis. 3. This type of osmotic environment/solution: •is ideal for plant cells •will cause a red blood cell to swell and burst •has a lower concentration of solutes. solution

Ch. 5 (Diffusion/Osmosis) and Ch. 7 (P/S) 1. What type of energy is this? •it can travel in waves ( light, sound) •it includes the random thermal motion of molecules. energy 2. This molecule : •is required for photosynthesis •diffuses across a semi-permeable membrane by osmosis. 3. This type of osmotic environment/solution: •is ideal for plant cells •will cause a red blood cell to swell and burst •has a lower concentration of solutes. solution

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter7: Cellular Respiration

Section: Chapter Questions

Problem 12RQ: Chemiosmosis involves. the movement of electrons across the cell membrane the movement of hydrogen...

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Electrical gradients ( potential; charges) exists on cell membranes because in part when the cell is at rest... a.The inner surface surface of the cell membrane is more negatively charged than the outer surface. b. the inner surface of the cell membrane is more positively charged than the outer surface. c. The membrane as a whole is hydrophilic on the outside. d. the membrane as a whole is hydrophobic on the outside e.None of the above
In osmosis, water moves from an area of low solute concentration (high water concentration) to an area of high solute concentration (low water concentration). So, it's the movement of water that helps balance the concentration of solutes on both sides of a semipermeable membrane. My question is when water move from high concentration to low concentration ,it's the movement of water making it balance. So why does it says in definition low solutue concentration going to that high solutue concentration, isn't it make the solute like ion and other molecules going to the higher side and not making it balance. High concentration of water to low concentration water movement is make sense to me But low solute cocentration to high solute concentration part does not make sense at all Please explain how does low concerned ntration solute going to high concentration of solute making balance?
Chemiosmosis involves. the movement of electrons across the cell membrane the movement of hydrogen atoms across a mitochondrial membrane the movement of hydrogen ions across a mitochondrial membrane the movement of glucose through the cell membrane
Which of the following statements is true for the figure in question 8? a. The net movement of solutes is into the cell. b. There is no concentration gradient. c. There is a potential for plasmolysis. d. The solvent will move against its concentration gradient. e. If this were a plant cell, turgor pressure would be maintained.
Discuss Concepts You place a metal pan full of water on the stove and turn on the heat. After a few minutes, the handle is too hot to touch but the water is only warm. How do you explain this observation?
Osmosis is the diffusion of water, and can be driven by many different factors, including temperature, pressure, the nature of the location, and solute concentration. Which of these is a requirement for osmosis to occur? Water must flow from low to high water potential. Only within plant cells is pressure required. Temperature must be above 30 C. There must be a semipermeable membrane.
A research student creates an artificial animal cell containing a 5M solution of glucose with a selectively permeable membrane that only allows water to cross it. She places the cell into a beaker of water. After an hour, what effect do you expect to observe? (a) Water moves out of the cell causing it to shrink. (b) Glucose moves out of the cell until equilibrium is reached. (c) Water moves into the cell causing it to lyse/burst. (d) Glucose moves into the cell by facilitated diffusion. (e) There is no net movement of water or glucose. Explain your answer
4. Which one of the following requires an energy source? a. a large molecule transported with its concentrated gradient b. a large molecule transported using facilitated diffusion c. a large molecule that has to use pinocytosis d. a large molecule that chemically emulates water e. a large molecule that chemically emulates oxygen
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??
The membrane in the diagram above is not permeable to the sugar in the solution, however it is permeable to water. Which of the following statements would best describe what will happen? Select ALL that apply. [mark all correct answers]a. Sugar molecules will move to side A until the concentrations on both sides are equal.b. There will be no change since the membrane is not permeable to the sugar molecules.c. Sugar molecules will move to side A at the same rate as the water molecules will move to side B.d. Water molecules will move to side B until the concentrations on both sides are equal.
Other cell membrane molecules include a compound called __________ , which functions to provide fluidity to rigid membranes and rigidity to fluid membranes; and surface carbohydrates, which function in the membrane not to provide energy, but instead to provide __________ . Aminophospholipids move to the inner leaflet of the membrane, by an enzyme known as the __________ . A main function of the cell membrane is to be very selective as to what is able to cross through, a condition known as a ________ barrier.
The interface formed between two hydrophobic molecules in the context of the aqueous environment of the cell cytoplasm is formed mostly through: A. Hydrogen bonds B. Covalent bonds C. Van der Waals interactions D. Ionic bonds E. None of the above