Diffusion and Osmosis lab Results: Figure 1a-rate of weight change in 15 min intervals of each concentration. The first tube showed very little weight change. However all other tubes show a greater change the concentration could be the factor that determines the permeability of the sucrose. The sucrose molecules are too large to pass through. Figure 1b- sucrose concentration determines the weight change. In this case based on our results as concentration increases the percent weight change
Premium Osmosis Chemistry Concentration
AQA Exam-style Questions Cell activity 1. a) - A : nucleus - B : mitochondria - C : ribosomes - D : plasmids b) The nucleus controls all activities within the cell. It also contains genetic materials used to create new cells. c) Plasmids and genetic materials in cytoplasm d) i 75 ii 28 iii 0.15 e) Protein can be used to build up cells as it is a structural component of every cells. It is also an enzyme as well. f) There are no mitochondria in bacterial cells because they are
Premium DNA Cell Cell nucleus
the sodium chloride solution and add water. 2 Explain what happened to the cells in sodium chloride solution using biological terms. Try to include these words. cytoplasm diffusion water solvent dissolved salts solute cell membrane vacuole cell wall osmosis plasmolysis turgid flaccid turgor 3 Explain what happened to the cells when you replaced the surrounding sodium chloride solution with water. Try to include the words from the list again. 4 What prevents the plant
Premium Cell wall Cell Cell membrane
semi-permeable and possesses the ability to control the movement of diffusion. Within the centre of a cell‚ the vacuole that is responsible for storage and the maintenance of osmotic balance can be located. In this study‚ we are using beets to study these cellular structures. Beet is a plant whose cells contain a characteristic red pigment‚ called betacyanin. It is located in the vacuole‚ which is surrounded by the tonoplast membrane (Biology 107 Lab Manual 2010-2011). In order for the betacyanin
Premium Enzyme Carbon dioxide Oxygen
1) Tay Sachs disease is one of many lysosomal storage diseases‚ this is caused by the lysosomes inability to produce certain enzymes needed to breakdown macromolecules. In Tay Sachs‚ the lysosome is unable to produce the enzyme beta-hexosaminidase A‚ which breaks down gangliosides within brain cells. Tay Sachs predominantly affects infants‚ and unfortunately there is no cure‚ symptoms include seizures‚ deafness‚ progressive blindness‚ and muscle stiffness. Gaucher disease is caused by the inability
Premium Diabetes mellitus Insulin Diabetes
Diffusion‚ Osmosis and Active Transport Substances will move through the membrane by diffusion. This is the random spreading out of particles until they are even. For example‚ when you put your instant coffee in boiling water‚ the coffee particles spread out and fill the entire mug‚ this is diffusion. A second way that substances can move through the cell membrane is by osmosis. This is a special type of diffusion where water moves from a high to a low concentration through a ’partially permeable
Premium Osmosis Membrane biology Cell
10. A paramecium has a contractile vacuole to help pump out excess water. What will happen to the rate of contractile vacuole function if the paramecium is placed in a: a) 100% water solution - Water will move rapidly into the Paramecium. The contractile vacuole will have to pump faster and faster to keep out excess water. If too much water enters the cell‚ cytolysis could occur. b) Salt water - Water will begin to leave the cell. The contractile vacuole will stop pumping to try to conserve
Premium Chemistry Concentration Water
341 0.420 0.601 60 0.742 0.253 0.585 0.465 0.350 0.290 0.431 70 0.987 0.350 0.385 0.638 0.937 0.222 0.829 Wavelength (nm) 526.00 534.23 526.20 536.32 531.90 535.36 526.90 In beetroot cells the red anthocyanin pigment occurs in the vacuoles. Each vacuole is surrounded by a membrane and outside it the cytoplasm is surrounded by the plasma membrane. These membranes are too thin to be seen but we can draw certain conclusions about their properties. Hypothesis; Membranes of the beetroot
Premium Cell membrane Water Acid
small that we are unable to see them with our naked eye. Animals and plants have many features in common within a cell such as a cell membrane‚ cytoplasm‚ mitochondria‚ ribosomes and the nucleus. Plant cells also have a cell wall‚ chloroplasts and a vacuole. We use microscopes to observe cells. I am going to carry out my practical examination using a light microscope to produce a magnified image of each cell. There are many features of a light microscope such as: * They use light * They have
Free Cell Eukaryote Microscope
CHAPT 1 - The scientific method allows the solving of problems and answering of questions. Observations Proposing ideas Testing the ideas Discarding or modifying ideas based on results Hypothesis: proposed explanation for a set of observations Hypotheses needs to be: Testable – it must be possible to examine the hypothesis through observations Falsifiable – it must be able to potentially be proven false Both logical and creative influences are used to develop a hypothesis A hypothesis
Premium DNA Gene Cell