... life forms-from single-celled algae to mammals-are dependent on many hundreds of simultaneous and precisely regulated metabolic reactions to support them from conception through growth and maturity to the final stages of life. Inside every living cell of an organism, chemical ...

... concentration on the activity of the enzyme rennin. Hypothesis: The substance with the highest substrate concentration will react the fastest to the enzyme rennin. Materials: * Beaker * Test tubes x 6 * Test tube rack * Hot plate * Masking tape for labels * 100mL ...

... or chloroplast that perform a specific function) called ribosomes. Some of the proteins work to as enzymes to control the chemistry of the cell and this is how DNA controls the cell itself. A living cell can copy its own DNA ...

... the cylinder into the test tube. 8. After a cylinder has been in the distilled water for 30 minutes, remove it and discard appropriately. 9. When that has been done there should be 10 test tubes containing a differing amount of pigment. 10. ...

... of its amino acids. Secondary structure of protein is the coiling and folding of the polypeptide chain and is caused by hydrogen bonding between the amino acids. This will result to the forming of a coil, fibril or pleated sheet ...

... important pathway is the glutamine synthetase/glutamate synthetase (GS/ GOGAT) pathway, which is ubiquitous in bacteria. Glutamine synthetase (GS) converts glutamate and ammonia to glutamine, and glutamate synthetase (GOGAT) transfers the amide group from glutamine to 2-ketoglutarate to produce two glutamate ...

... gives prokaryotes a large surface-to-volume ratio, making it a simple, but efficient organism (absorbed nutrients have to travel only a small distance to diffuse completely throughout the inside of the cell). Thus, prokaryotes have a relatively large surface absorption area, ...

... hydrogen, ammonia and methane present (www.britannica.com). In a reducing environment such as this, it is thought that the origin of life was most certainly possible. The joining of simple molecules through chemical bonds into more complex larger molecules can occur in ...

... nucleus in eukaryotic cells is separated from the cytoplasm by a nuclear envelope. The nucleus divides by mitosis. The DNA inside the nucleus is packaged in a highly organized way. It consists of a basic unit called a nucleosome, which ...

... input to the next neuron in the network. Each neuron is composed of a cell body (known as the soma) and is connected to dendrites, which carry and receive the incoming information in the form of electrical impulses to the ...

... and anhydrous.'(2) Triglycerides form compact food reserves which do not upset the osmotic balance of cells. For example, triglycerides are often found as droplets in cells and in seeds. 'Plants whose seeds store triglycerides are often important agricultural crops.'(3) The ...

... nucleus are one or two small round bodies each called a nucleus. They cannot be seen very well as they are not bounded by a membrane. They manufacture RNA using the information in its own DNA. The functions of the ...

... The way in which this is stored differs depending on whether the cell is a growing cell or a 'resting' cell, i.e. one in which minimal synthesis of DNA and RNA takes place. The heterochromatin- a threadlike mass of DNA ...

... pits (unlignified areas) to allow lateral movement of water. Xylem vessels are found in angiosperms. Water enters through the root hair cells and then moves across into the xylem tissue in the centre of the root. Water moves in this ...

... form a continuous tube. Such a vertical series of vessel elements is called a vessel. The walls become strengthened with the addition of lignin. The lignin is laid down when the plant cell was 'normal'. Lignin is a very hard, ...

... form a continuous tube. Such a vertical series of vessel elements is called a vessel. The walls become strengthened with the addition of lignin. The lignin is laid down when the plant cell was 'normal'. Lignin is a very hard, ...

... smaller monosaccharides and disaccharides; proteins are broken down into polypeptides, then into tripeptides, dipeptides and finally amino acids. Human digestion begins with physical digestion - the action of teeth chewing or mastication. This is when the mouth takes in the saccharide ...

... Cress Seeds That Germinated at Different Concentrations of Cu2+ Ions (mg/l) - Anomalous Data - 27 Calculating the Standard Deviation for Each Concentration of Cu2+ Ions (mg/l) - Anomalous Data - 28 Calculating the Standard Error for Each Concentration of Cu2+ Ions (mg/l) - Anomalous Data - 29 Calculating ...

... peroxide. If the organisms produce catalase, bubbles form in the solution from the release of oxygen. As with all enzymes, catalase is a protein, meaning that it is synthesised within the cell from building blocks called amino acids. In addition to ...

... second row. The whole row should go black. Go to Table-Split Cells and click on 3 columns. Shading Cells Double click on the left hand side of the first row. Go to Format-Borders and Shading and click on the Shading tab. Under ...

... The percentage of plasmolyzed cells in each solution was plotted against the sucrose concentration. The concentration that caused 50% plasmolysis was visually estimated from the graph. The osmotic potential of the solution that caused 50% plasmolysis was calculated using the ...

... The B vitamins are precursors of coenzymes. * Thiamine (B1) * Riboflavin (B2) * Nicotinamide 2 H2O2 ----> 2 H2O + O2 (Hydrogen peroxide ----> water + oxygen) Coenzymes may be covalently bound to the protein part (called the apoenzyme) of enzymes ...

... and Substrate Temperature The rate of an enzyme controlled reaction is measured upon the substrate used or the products formed over a period time. Increasing the temperature causes more heat energy, which makes the substrate molecules and enzymes move a lot faster. ...

... pH a control solution was made up. The control solution contained 3 ml of denatured enzyme and 3 ml of a pH buffer4. * The test tubes were then placed in a beaker, which was in turn placed in a water ...

... enzyme will no longer work because it will no longer fit, the active site will be ruined. The enzymes react like a lock and key, only one lock fits the key. When the two join then you get the chemical ...