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
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The nucleus is a large membrane bound organelle. Most cells have a single nucleus though skeletal muscle can have more than one (multinucleate) or some cells such as red blood cells have no nucleus. The nucleus contains the genetic material and is where DNA replication and RNA transcription occur. The nucleus is bound by a membrane which contains nuclear pores. These pores allow RNA molecules and proteins to move in and out of the nucleus. However‚ this process is selective and is energy dependent
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Each cell can be regarded as a metabolic compartment‚ as separate place where the chemical processes of that cell occur‚ the cell is made up of different organelles each specifically designed to carry out their function‚ and this is known as a cells ultrastrucure. All cells have a cell surface membrane; these are made up of phospholipids and make up a bilayer. A phospholipid has a hydrophilic head and a hydrophobic tail which is made up of 2 fatty acid chains; these are arranged is two layers with
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Animal Cell Organelles & Their Functions 1. Nucleus - The nucleus generally contains the genetic material for the cell. Because it contains the DNA and chromosomes‚ which affect the proteins that determine the activities of the cell‚ the nucleus can be considered to be the cell’s control centre. 2. Cytoplasm - The cytoplasm contains primarily water and protein material. This is where the other cell organelles reside‚ and where most of the cellular activities take place. 3. Cell Membrane - The
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of a cell; cell membrane‚ nucleus‚ cytoplasm‚ mitochondria‚ endoplasmic reticulum (rough and smooth)‚ ribosomes‚ Golgi apparatus/complex and lysosomes. The cell membrane is a thin semi-permeable membrane that surrounds the cell. Its purpose is to hold the structure of the cell‚ protecting and enclosing all of the other organelles within it. The semi-permeable membrane enables substances to move in and out of the cell. The nucleus is like the brain of the cell. It is the biggest organelle in the
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most obvious organelle in any eukaryotic cell. It is enclosed in a double membrane and communicates with the surrounding cytosol via numerous nuclear pores. Within the nucleus is the DNA responsible for providing the cell with its unique characteristics. The DNA is similar in every cell of the body‚ but depending on the specific cell type‚ some genes may be turned on or off - that’s why a liver cell is different from a muscle cell‚ and a muscle cell is different from a fat cell. When a cell is dividing
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‘Discuss how cell organelles are structurally and functionally interrelated’ The Golgi body is a membrane bound organelle mainly found in eukaryotic cells. The Golgi body has two faces the cis face‚ where the substances enter from the RER for processing and the trans face‚ where they exit the RER in the form of tiny vesicles. (Davidson‚ M. (2004) Molecular expressions http://micro.magnet.fsu.edu/cells/golgi/golgiapparatus.html) The rough endoplasmic reticulum is the site where most cell membrane
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of 5 micrometers - spherical shape - controls all cell activity by directing which enzymes are made for specific functions - stores the genetic material of the cell (DNA) - directs the chemical reactions in cells by transcribing genetic information from DNA into RNA (called DNA replication) - DNA replication allows cells to transfer information from one cell to the next during replication. - Nuclear envelope is the gateway to the cell (also known as nuclear pores)and allows substances (such
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How to Calculate Beta Beta refers to the volatility of a particular stock compared against the volatility of the entire stock market or‚ in practice‚ a representative index of that market‚ such as the Standard and Poor ’s (S&P) 500. Beta is an indicator of how risky a particular stock is and is used to evaluate its expected rate of return. Beta is one of the fundamentals stock analysts consider when choosing stocks for their portfolios‚ along with price-to-earnings ratio‚ shareholder ’s equity
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How insulin effects digestion Insulin is a hormone that is produced in specialized cells in the islets of Langerhans‚ a part of the pancreas. The main role of insulin is to regulate the body’s use of sugars and other nutrients. The process is initiated during and immediately after the process of digestion breaks down carbohydrates into sugar molecules (including glucose) and proteins into amino acids. Right after a meal‚ glucose and amino acids are absorbed directly into the bloodstream
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