Cell Biology- Osmosis‚ Cell Size and Diffusion and Enzymes 1.0 INTRODUCTION Cells are the basic building blocks of all living things. They provide structure for the body‚ take in nutrients from the food‚ convert those nutrients into energy‚ and carry out specialized functions. Cells also contain the body’s genetic material and can make copies of themselves. A cell is also a metabolic compartment where many different chemical reaction occur. There are two types of cells‚ eukaryotic and prokaryotic
Premium PH Enzyme Osmosis
Diffusion and Osmosis Through Dialysis tubing We did this experiment to test the diffusion of different substances through dialysis tubing. We used what we knew about diffusion to make predictions on what we thought the mass of the dialysis tubing to be after submerging them for 30 mins and we knew that diffuse occurs from highest concentration to lowest concentration. Since the dialysis tubings are filled with different substances than what they are being put into then they should all gain
Premium Concentration Osmosis
Effects of Tonicity on Cell Membrane Abstract The purpose of this experiment was to determine the effects of tonicity on a cell membrane using red blood cells‚ potato strips and three unknown solutions (A‚ B‚ C). First three slides were prepared containing RBC’s and unknown solutions A‚ B and C. A control slide was prepared only using RBC’s. After observing each slide under the microscope it was determined that unknown solution A was hypertonic because the RBC appeared to have shrunk. The
Premium Cell membrane Cell wall Cell
Experiment 2 : Transport Across Membrane Name : Matrix No : Group : B Semester : 1 Date of Experiment : 05.09.2013 Lecturer’s Name : Miss OBJECTIVE To study the effects of hypotonic‚ hypertonic and isotonic solutions on plant and animal cells. INTRODUCTION In cellular biology the term membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes‚ which are lipid bilayers
Premium Cell wall Cell Cell membrane
Ronald Wilson Pd:4th 11/16/12 Introduction In this experiment diffusion and osmosis is the main idea. When using diffusion and osmosis you are trying to separate different solute concentrations on either side of the membrane. Only a solute’s relative concentration‚ or water potential‚ affects the rate of osmosis. The higher the concentration of solutes‚ the faster water will flow through the membrane to equalize the concentration. The way we describe the movement from higher to lower concentration
Premium Osmosis Chemistry Solution
As the potato has a semi-permeable membrane will allow the diffusion of water molecules to go in and out of the potato‚ depending on the concentration gradient between the potato and the solutions. If the solutions have a higher concentration of carbohydrates or glucose‚ then the potato the water will pass through the membrane and into the potato and it will gain weight. However‚ if the solution has a lower concentration then the potato the water will go out of the potato through the membrane
Premium Cell Protein Organelle
following. I do hypothesis a different outcome in the experiment if the water was moving around opposed to sitting still. Part B: The Effect of Salt Concentration on Osmosis in Potato Cells. Introduction: 1. The purpose of doing this lab was to recognize the effects that salt‚ in different strengths‚ has on cells. 2. Osmosis is the movement of water molecules
Premium Osmosis Water Diffusion
Name: Lawrence D. Mandras Date: August 17‚ 2013 Rating:_____ Yr. & Course: BSED-IV Laboratory Experiment no. 2 The Living Plant Cell Objectives: * To study the different types of plant cells. * To observe plant cells as to their shapes‚ structures and function. Materials: Microscope cover slip glass slide water onion Iodine soln. hydrilla salt tomato razor blade Medicinal dropper epidermal tissue of rhoeo-discolor
Premium Cell wall Cell Water
contain the ideas or writing of other individuals/authors. _Alexandra DeWitt_____________ __5/1/13____________ Author Date _10_________ Lab Section # Increasing Sucrose Concentrations Causes the Osmotic Concentrations of Disks of Potato Tubers to Decrease Abstract: Introduction: The biological membranes are composed of phospholipid bilayers‚ each phospholipid with hydrophilic heads and hydrophobic tails‚ and proteins. This arrangement of the proteins and lipids produces a selectively
Premium Concentration Osmosis Chemistry
purpose of this experiment was to test the tonicity of potato cells. The potato cells were placed in different test tubes with water and were left there for 15 minutes. The percent change in mass is then used to determine if the cells lost or gained water‚ therefore determining the tonicity of the cell. Although it was a brief short time‚ the final results showed that the more water the potatoes were placed in‚ the more hypotonic the potato becomes. Tonicity is stated to be the state of a solution
Premium Osmosis Cell wall