Finding the concentration of a Potato cell.
Aim
The aim is to find the concentration (mole/dm3 (M)) of solute in a potato cell by using the process of osmosis and different concentrations of sucrose solution.
Background information
Osmosis is diffusion of water across a partially permeable membrane. It moves from a solution with less solute concentration (high water potential) to a solution with more solute concentration (low water potential). The one with a high water concentration is called a hypotonic solution and the low water concentration is called hypertonic solution, but these only depend on what type of concentration is on the other side of the partially permeable membrane. When more water passes through to one side of the membrane it is called net movement.
(Toole + Toole "Essential AS level Biology")
This is an example of the net movement through a partially permeable membrane. The right side is the more dilute solution, which makes it the hypotonic solution. The left side is the less dilute solution, which makes it the hypertonic solution. Net movement occurs through the more dilute to the less dilute so it goes from left to right though the partially permeable membrane. As you can see, the dotted line going horizontally through the middle of the two levels of solution shows the level of the solutions at the beginning when the two sides where given equal amounts of its solution. The horizontal solid lines show the level of the two sides after it was left for 2 hours. The right side has more solution in it because of the greater net movement of water going to the right from the left side by the process of osmosis.
(Marveen "GCSE Biology")
This diagram is of two liquids separated by a partially permeable membrane. The left side has large molecules of solute that has dissolved...
More Biology
essays:
Biology Practical to study the Osmosis effects of Sucrose solutions of different Molarities upon Plant Cells (Chinese Radish and Potato Chips)
... experiment. Osmosis- This is the movement of water molecules from an area of high water potential (a dilute solution) to an area of low water potential (a concentration). This occurs across a semi permeable membrane until ...
Investigating the effect of temperature on the action of a protease enzyme on exposed developed film
... and concentration of protease solution was the same for each temperature. I said that the range of temperatures would go from 300C up to 700C. However when it came to the experiment one water bath ...
1.Find THE AMOUNT OF REDUCING SUGARS AND STARCH IN YELLOE AND GREEN BANANAS by Using the Benedict's test nad Iodine test. Why the Benedict's solution should be used in excess.
... The materials and apparatus:- yellow banana- green banana- Benedicts solution- Iodine solution- distilled water-measuring cylinder-dropper-test tube *6-motar and pastle-beaker ...
The Effects Of A Stroke
... difficulties, neglect of the left side, poor judgment, extreme emotional highs and lows, and impulsiveness. The right hemisphere is more in control of ... of the brain. The researchers currently are looking for the biological cause of the depression, using animal studies and imaging methods ...
Genome: The Autobiography of a Species in 23 Chapters by Matt Ridley
... they have a strong background on cellular/molecular biology. I think it is highly recommended that college students going into the biological field read this ... smoke, or take vitamin pills, if u work out or become a couch potato." (Genome 56) This is interesting because if one has this mutation there ...
Sperm Travel Essay - A brief essay about the journey of a sperm, the glands and hormones involved in reproduction, and how a baby is born.
... endocrine cells to start producing testosterone, which also influences the production of sperm. The productions of these hormones are controlled by a negative feedback system. If testosterone levels are high, the ...
The Life of a Homosexual
... . High school life may also be taunting and unsafe. The feeling of not being accepted by their loved ones or friends may lead to one solution ... Asians should behave. Another stereotype that homosexuals are addressed as is Potato Queen. Potato Queen is an Asian American who only dates white men. Last ...
The lifestory of a Cadherin
... the membranes of twoadjacent cells are separated by a uniform narrow gap of about 2 4 nm. Thegap is spanned by channel-forming proteins (connexins). The channels theyform (connexons) allow inorganic ions and other small water-solublemolecules ...