Summary of the cell cycle illustrating: G1; S; G2 and M phases. Cells grow and prepare to synthesize DNA in the G1 phase. Cells move towards end of G1 phase to pass through G1-checkpoint. G1-checkpoint determines if a cell is suitable for cell division by checking for damaged DNA. On check completion, cells owning undamaged DNA move to the S phase. Cells with damaged DNA are arrested and "commit suicide" via apoptosis. Proto-oncogenes are normal genes which produce signals to guide a cell to divide or
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introduction 23rd feb : Pass program Little groups * Learning notes topics discussions * Informal * opens Friday 27th feb 5.00 Studies: How the body works Anatomy Gross anatomy – internal structures Microscopic anatomy- study of cells, study of tissues (microscope) Physiology- cellular physiology – e.g. nerves and muscle fibres Integrative physiology- different tissues and organs, functions e.g. cardiovascular Levels of organisation e.g. tissues, organs, organ systems organism
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Baculovirus-recognizing human cell receptor identified for the first time | The receptor used by baculovirus to enter and interact with human cells has been identified. This syndecan-1 receptor was identified for the first time in a recent collaborative study carried out by the University of Eastern Finland and the University of Jyväskylä in Finland. The findings increase our understanding of the strategies by which the virus causes infection in cells and further facilitates
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BIOLOGY 102: General Biology Investigation 3 Cell Structure and Cell Membranes Part 1 - Cells [20 points] Specimen Number | Organism | Eukaryote or Prokaryote | Where Organism is Found | How Organism Obtains Nutrients | Image 9 | Spirogyra | Eukaryote | Freshwater, free-floating | Autotrophy | Image 7 | Diatom | Prokaryote | Oceans, freshwater, soils and damp places | Heterotrophy | Image 6 | Paramecium | Eukaryote | Freshwater, brackish and marine environments, often
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Chloroplast and Mitochondrion in Plant Cells Introduction: Mitochondrion and chloroplast are two organelles that are very important to organisms. Both provide energy and nourishment to the cell. While chloroplast is found in plant cells only, mitochondrion is found in both animal and plant cells. It is believed that these two organelles were once bacterial cells on their own, but then they were engulfed by other bacteria. This theory is called the Endosymbiotic Theory. This theory
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Egg Makes Sure That Sperm Don't Get Too Old The article primary’s claim is that the result is an important step towards future stem cell therapy (science daily). I. Observe and Generalize: • I would like to learn more on how men are fertile throughout life. I would like to find out the how this is a contrast to women? II. Hypothesis: • The subject and/or hypothesis of this claim, is that the fertilizing sperm can get help from the egg to rejuvenate (science daily). III. Experiment
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6CO2+6H2O light C6H12O6+6O2 Carbon Water Glucose Oxygen Dioxide (Sugar) Golgi Bodies Golgi apparatus Dictyosomes Vesicle Substance to be secreted from the cell Cell Wall synthesis in dividing plant cells cellulose. Vesticles- Single Unit membrane bound structure. 1. Lysosomes- Suicide bags- contain hydrolytic enzymes 2. Peroxisomes- Breakdown H2O2 (Hydrogen Peroxide) or other peroxides Cytockeleton- Consists of three
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Discuss the different ways cells communicate with each other. Cells are the smallest functional unit in an organism and they piece together to make the genetic build-up of that organism, as a result some organisms contain millions of cells which must all communicate together to ensure the correct functionality of the organism. This is done by sending and receiving signals from one cell to another. As cells vary in their structure and purpose, they must communicate in different ways, hence appropriate
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In vitro cytotoxic effects of Muntingia Calabura Linn. Fruits against human cancer cell lines. Introduction Muntingia calabura Linn is a plant that belongs to the Elaeocarpaceae family, commonly known as cherry tree. The tree bears small red fruits with enormous tiny yellow seeds. The fruits are so sweety and juicy, which attracts the people to eat. This plant has been used as the Peru traditional medicine in reducing the swell of the prostate gland and alleviating headaches and cold as well
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of cells in the human body contain a nucleus but not all nuclei are the same as there are many variations. The nucleus has the largest spherical structure within the cell, and is known as the ‘brain of the cell’ because the nucleus controls all of the cell’s activity, such as: reproduction of cells and movement. The nucleus contains strands of DNA (chromosomes) in the form of a double helix. Within the human body there are cells that have no use for a nucleus such as red blood cells and cells that
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