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Living cells

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Introduction

Int 2 Biology Unit: Living Cells Class: NQ HFSP 2 3. The important part of plant cell that's for maintaining plant structure is Cell Wall. 4. The part of cell that enables plants to perform photosynthesis is Chloroplast. 5. Yeast is a Fungus organism. 6. The products used to make yeast are: Beer-Making and Wine-Making. 7. The conditions that yeast must be kept to make these products are anaerobic conditions. 8. The organisms that make antibiotics are: The Fungus Penicillium&Antibiotic Penicillin. 9. The reason why organism makes antibiotics is because Fungi naturally produce substances that kill bacteria. 10. Bacteria can be used to make yoghurt by adding milk. 11. The substance that makes bacteria turn into milk is Lactose. Diffusion& Osmosis 1. Diffusion occurs when gas particles or particles dissolved in a solution spread. They move from a region where they are in high concentration to a region where they are in low concentration. 2. The substances that move into a cell by diffusion are: * Oxygen * Carbon Dioxide * Glucose 3. Oxygen diffuses from the air sacs in your lungs into your blood capillaries because the concentration of oxygen is higher in the air sacs and lower in the capillary blood. Osmosis 4. Osmosis is the movement of molecules from an area of high water concentration to an area of Low water concentration through a SEMI-PERMEABLE MEMBRANE. ...read more.

Middle

The active site fits only the enzymes reactants just as a key fits only a given lock. 7. Increasing temperature increases the energy of molecules. This causes an increase in the rate of reaction due to: a) more frequent collisions being more energetic and therefore more likely to react. The temperature of a chemical reaction states that the rate of reaction will double for each 10?C rise in temperature. In enzyme catalyzed reactions this holds up to a point. After this point (the optimum temperature) increasing energy causes hydrogen bonds and hydrophobic interactions to break. The active site starts to lose its shape and the enzyme denatures. 7B. Changing pH alters the ionic charges on some groups in the protein molecule. This damages ionic bonds, changing the shape of the molecule. Small changes in pH cause reversible damage. Very large changes may irreversibly denature the enzyme. 8. The best term to describe the best temperature and PH for enzymes is Optimum condition. Respiration 1. The food that's used during respiration to give the body energy is called Chemical energy. E.g. it is the way that energy is released from Glucose. 2. The food group that Glucose belongs to Kilocalories. 3. The energy molecule that's made from this food is Glucose. 4. The substances are ADP and ATP. 5. The first stage of aerobic respiration is glycolysis, which takes place in the cytosol of cells and also occurs in fermentations and other forms of anaerobic respiration. ...read more.

Conclusion

Chlorophyll molecules are excited in the presence of light and liberate electrons that split water into hydrogen and oxygen. The hydrogen combines with carbon dioxide through various complex processes to form glucose, and the oxygen is liberated out into the atmosphere. 2. 6CO2 + 12H2O + light � C6H12O6 + 6O2 + 6H2O 3. Plants get their energy from sunlight, which energy is used via the chlorophyll, to manufacture food from carbon dioxide from the air, and water and nutrients from the soil. B. The light energy is converted from the sun is converted to chemical energy as ATP and then to a store of chemical energy in the food. 1ST Stage of Photosynthesis Sunlight goes into the leaves as well as water. The combination of the sunlight brakes down the water molecules into oxygen. The hydrogen which broke off from the water molecule then gets carried by the NADP molecule (energy storage) into the second stage of photosynthesis 2nd Stage of Photosynthesis Second stage of photosynthesis where NADP (energy storage molecule) which acquired hydrogen in the first stage, goes to the second stage as NADPH. Hydrogen from this molecule then joins together with carbon dioxide, and through a special process, come together to create glucose. 5. The storage substance of plants is Carbohydrate -starch. 6. The are 3factors that can limit photosynthesis from going any faster these are: * Light intensity * Carbon Dioxide concentration * Temperature ?? ?? ?? ?? Mary Mwage ...read more.

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