hall controls all activity that occurs in the city. The mitochondria are like the power plants. The mitochondrion converts chemical energy into energy for the cell. The power plants provide energy to all parts of the city. The vacuole is like the land fill. The vacuole stores materials containing water‚ food‚ or waste. The land fill stores harmful waste products safely. The Golgi apparatus is like the post office. The Golgi apparatus is to modify‚ sort‚ and package proteins and other materials
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structures Procedure SAFETY: Always carry scalpels clasped to a tile and with the tip pointing away from you. Beetroot cells contain pigments called betalains that give the tissue its dark purple-red colour. The pigment is contained in the cell vacuole. Investigation a. Collect 3 or 4 beetroot cores from the beaker provided. Cut each core into 2 cm sections until you have enough for one core for each temperature of water bath that you will be using. Put your 2 cm sections into a test tube
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Cell Microstructure and function Smooth endoplasmic reticulum Nucleolus Chromosomes Transfer RNA DNA Messenger RNA Centrioles Phospholipids Rough endoplasmic reticulum Cell Membrane Nucleus Golgi apparatus Mitochondria Lysosomes Cell membrane Cell membrane is a thin‚ elastically‚ living semi permeable membrane so it controls what goes in and out of the cells. Cell membrane is also made up of two layers of lipids with protein molecules between them which
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Receptor-mediated endocytosis Receptor-mediated endocytosis is an important mechanism the body uses to remove cholesterol from the bloodstream. Persons with the inherited disease hypercholesterolemia lack normal LDL receptors and as a consequence‚ have dangerously high levels of circulating cholesterol. Their cells cannot remove circulating LDL particles‚ and so the load of cholesterol tends to accumulate on the walls of their arteries‚ which eventually blocks blood flow. Mammalian cells use receptor-mediated
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Worksheet 2- Brittani Wright 1. a) Define a cell. A cell is the basic unit of life b) What is a unicellular organism? An organism that consists of only one cell c) Can a cell be multicellular? No because a cell is the smallest unit of life‚ cells can however join together to start forming something else 2. a) What is a difference between prokaryotic and eukaryotic cells? b) What is one significant similarity? Prokaryotic cells do not have a neucleus and Eukaryotic cells do have a nucleus
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undergoes pain‚ low blood platelet count that will be harder flowing‚ and growth of the liver and spleen. These visceral and neurologic symptoms are causing disruption of the lysosomes because of accumulation. The accumulation will cause damage to the organs such as spleen‚ liver‚ and brain. As we all know the location of lysosomes are in the cell that contains enzymes that digest and separate the cell after its death. The hereditary deficiency‚ meaning that it passes along with the families of the enzyme
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3.1 BIOLOGICAL MEMBRANES 3.1.1 Properties of Cell Membranes • Separates living cell from its nonliving surroundings. • 8 nm thick. • Selectively permeable - allows some substances to cross more easily than others. 4.1.2 Fluid Mosaic Model • Singer and Nicolson (1972) - plasma membrane is a mosaic of proteins dispersed within lipid bilayer‚ with only bilayer‚ the hydrophilic regions exposed to water. Hydrophilic region of protein Phospholipid bilayer Hydrophobic region of protein
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“DISCUSS THE STRATEGIES THAT ARE USED BY BACTERIAL PATHOGENS TO EVADE HOST ANTIBACTERIAL PEPTIDES AND PHAGOCYTES” The mammalian immune system has two major components; the innate and the adaptive immune system. The innate system is usually the first line of defence and it acts as a strong roadblock to invading bacterial pathogens through direct mechanisms such as inflammation‚ phagocytosis‚ complement system activation‚ antibacterial peptides and indirectly by activating adaptive response through
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cells only have centrioles if they are in the lower plant species. Both types of cells have vacuoles‚ but their functions are quite different. The purpose of vacuoles in a plant cell is to store water and maintain the structure of a cell‚ whereas in animal cells they are used to store water‚ waste‚ and ions. Animal cells have one or more small vacuoles‚ whereas plant cells have one‚ large central vacuole. Plant cells are the only type of cells that contain plastids which contain pigments that are
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The Observation of organism in a drop of pond water (Paramecium) under LPO and HPO Compound Microscope Doreenda A. Sabao BS Biology I-A .Lab 1 August 01‚ 2013 INTODUCTION A pond is a body of freshwater smaller than a lake. Ponds are naturally formed by a depression in the ground filling and retaining water. Streams or spring water is usually fed into these bodies. They can also be man-made ponds which can be created by damming a stream‚ digging a hole. Ponds are usually
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