Background information: Molecules are always in random‚ constant movement due to their kinetic energy. This causes the molecules of a cell to move around and bump into each other. The random movement of molecules from an area of high concentration to low is called diffusion. Osmosis‚ a specific kind of diffusion with respect to water takes place in the cells. This kind of diffusion is where water moves through a selectively permeable membrane‚ that is‚ a membrane that only allows specific molecules
Premium Osmosis Cell wall
The Glass Castle written by Jeannette Walls is a remarkable true story of a family and the problems they face because of poverty. This two hundred and eighty eight page book is a truly inspiring and astonishing memoir. This book was published in 2005 and has spent more than three years on the New York Times bestseller list. This book would be great for high school students for many reasons. For one high school students aren’t exposed to memoirs very often. Secondly‚ it’s a more modern piece
Premium Family Mother Jeannette Walls
Cells must move materials through membranes in order to maintain homeostasis. The cellular environment is aqueous‚ indicating that the solutes dissolve in the solvent‚ water. When a cell is hypertonic‚ or hypotonic‚ to its surroundings‚ it tries to make concentration of solution inside and outside itself equal. However‚ the solutes are too big to pass the cell membranes without the help of channel proteins‚ or transport proteins
Premium Osmosis Concentration Chemistry
Nucleus- The nucleus is the control center of the cell. This is where DNA is contained. This is like the town hall or the mayor’s office because it is the control center of a town. The nucleus uses DNA like a city uses blueprints to direct the production of protein. Nucleolus- The nucleolus is where ribosome is made and is rich in RNA content. It is located inside the nucleus. A mayor is like this because the mayor makes everything in the town happen. He also works from the town hall‚ or works
Premium Cell Organelle
experiment is to see the effect of different Pectinase concentrations have on the production on apple juice. Pectinase is an enzyme‚ which breaks down pectin‚ a polysaccharide found in plant cell walls. This enzyme is mainly commercially used to speed up the process of fruit juice production as the cell walls of plants are broken down more quickly. Therefore by changing the Pectinase concentrations‚ the results may show the effects it may have on how much apple juice will be produced. Hypothesis
Premium Enzyme Filter paper Cell wall
3/21/2012 Cell Growth & Division Essay Kate Nogler Mr.Lapointe When a living thing grows‚ it produces more cells through a process called cell division. Cell division is necessary for any growing eukaryotic cell structure. Cells divide through a system called the cell cycle. It is a complicated and crucial part of anatomy! Before a cell divides‚ it must grow. However‚ a cell can’t grow forever. Once a cell gets too big‚ it divides itself into two daughter cells. A cell divides because
Premium Mitosis Chromosome Cell cycle
Cell Membrane and Organelle Webquest Name Yamani Woody Using the websites listed‚ answer the following questions. Website #1: http://www.usd.edu/~bgoodman/Membrane.htm http://www.biologymad.com/cells/cellmembrane.htm 1. What invention came along that enabled us to better see the cell membrane? Electron Microscope 2. What are the two parts (list the first two listed) of the cell membrane? Phospholipids and proteins 3. What is one of the cell membrane’s jobs? It controls how substances can
Premium Cell Organelle Lipid bilayer
Diffusion Hypothesis: When animal and plant cells are placed in a solution‚ the movement of water is effected by the solute concentration of the solution. If animal and plant cells are placed in a more concentrated solution‚ the solution becomes hypertonic to the cells‚ causing water to exit the cells. This changes the appearance of the cells‚ causing the cells to look darker (more concentrated) and shriveled up. Null Hypothesis: When animal and plant cells are placed in a solution‚ the movement of
Premium Osmosis Concentration Chemistry
called “malasebo” is eaten outright either with or without salt (E. Quisumbing‚ 1951). Sampalok pulp contains Pectin which can be useful in our society and possibly be extracted. Pectin is a structural heteropolysaccharide contained in the primary cell walls of terrestrial plants. The main use for pectin (vegetable agglutinate) is as a gelling agent‚ thickening agent and stabilizer in food. On this account‚ the researcher would like to experiment on tamarind pods‚ which has Pectin content and to
Premium Cell wall
help setting) This is a polysaccharide It is found in the cell walls of ripe fruit. Pectin affects the setting quality of the jam. Releases pectin from the cell walls of the fruit as the fruit softens. Gives a good colour and flavour to jam. Acid prevents crystals forming. Lemon juice is commonly added. A closer look at pectin Pectin = carbohydrate -> Polysaccharides Using lemon juice helps to draw the pectin from the cell wall. Under-ripe fruit Ripe fruit Over-ripe fruit Pectose
Premium Cell wall Water Carbohydrate