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Why Cell membranes are not permeable to anthocyanin. If the anthocyanin appears in the solution what must have occurred?
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Why does a plant cell lose water by osmosis when put in a concentrated solution?
Not just plant cells, all cells with semi-permeable membranes loose water when placed in a more highly concentrated solution.
What is in the red pigment of mayana leaves its base or acid?
The red pigment is an anthocyanin; the color is purple in a neutral solution.
What is the best description of osmosis?
Osmosis is a proces of transfer of a diluted solution in the zone of a more concentrated solution through a semi-permeable membrane.
Is petunia a chemical indicator?
The anthocyanin petunin changes from reddish-purple in an acidic solution to violet in a basic solution.http://fpedagog.org/PetuniaFlowers/petunia-flowers-as-indicators
When comparing two solutions the solution with greater concentration is?
It often depends. The one with more solute has a higher concentration of solute than the other. In pertaining to osmosis, the hypotonic (or hypoosmotic) solution has less solute and more water over a semi-permeable membrane where the hyperotonic (or hyperosmotic) solution has more solute and less water over a semi-permeable membrane.
What is a permeable solution?
A solution is not permable; permeable is the material which allow the passage of the solution.
What solution blank to measure anthocyanin?
It can be measured by UV- spectrophotometer. The pH differential method has been used to determine the anthocyanin content
What is the difference between a semi-permeable and a partially permeable membrane?
An impermeable membrane is that through which no substance can pass. Semipermeable membranes are those that let only solvents, like water, to pass through it. Permeable membranes are those that let solvent and solutes, like ions and molecules, to pass across it. There are also selectively permeable membranes, i.e., membranes that besides allowing the passage of solvent, let only some specific solutes to pass while blocking others. See link:
Why does a plant cell lose water by osmosis when put in a concentrated solution?
Not just plant cells, all cells with semi-permeable membranes loose water when placed in a more highly concentrated solution.
What is in the red pigment of mayana leaves its base or acid?
The red pigment is an anthocyanin; the color is purple in a neutral solution.
On which side of a selectively permeable membrane does osmosis exert pressure?
A selectively permeable membrane (also known as a differentially permeable membrane or a semi-permeable membrane) is permeable to the solvent but not to solutes.In cells, the solvent is always water.All cell membranes (such as plasma membranes and vacuole membranes) are selectively permeable.This means that water can cross these membranes by osmosis. This will happen when the total concentration of solutes on one side of the membrane is different from that on the other side.The process is passive (requiring no energy input) and you can think of it as being an attempt by nature to "even up" the difference. Water passes into the stronger solution, i.e. the one with the higher concentration of solutes. If equilibrium is reached, the process will stop.One example of the importance of osmosis: mature plant cells contain a central vacuole, holding an aqueous solution of various chemical compounds. These solutes create an osmotic pressurethat attracts water, swelling the vacuole and giving the cells turgor. The turgor of cells in well-watered plants holds up soft parts like leaves. If a plant lacks water, the vacuoles shrink and the leaves wilt.
What substance can diffuse through a differentially permeable membrane?
Diffusion across a membrane in biology is referred to as 'osmosis' & osmosis is the process by which solvent molecules move from a region of high conc. to low concentration and this can therefore occur only in one direction at a time for a perticular solution. this is a really smart answer im surprised
What is a cabbage indicator?
The phrase "cabbage indicator" refers to the use of red cabbage juice to indicate the pH of a solution. For red cabbage contains the pigment molecule ka flavin, which is an anthocyanin. In fact, anthocyanin also is responsible for the reds of certain tree leaves such as sassafras [Sassafras albidum] and sourwood [Oxydendrum arboreum]. Anthocyanin has the advantage of being a water soluble pigment. Its color varies depending upon the acidity/neutrality/alkalinity of the solution in which it's found. For example, the anthocyanin pigments in red cabbage juice turn red in acidic, purplish in neutral, and greenish-yellow in basic solutions.
What is the diffusion of water of another solvent from a more dilute solution to a more concentrated solution through a membrane that is permeable to the solvent?
OSMOSIS
A balloon permeable to water but not to glucose contains a 10 percent glucose solution A beaker contains a 5 percent glucose solution the solution in the balloon is what?
the solution in the balloon is hypertonic relative to the solution in the breaker. is this true
What is the best description of osmosis?
Osmosis is a proces of transfer of a diluted solution in the zone of a more concentrated solution through a semi-permeable membrane.
Is petunia a chemical indicator?
The anthocyanin petunin changes from reddish-purple in an acidic solution to violet in a basic solution.http://fpedagog.org/PetuniaFlowers/petunia-flowers-as-indicators
