The Cell Cycle Mitosis: the process by which cells reproduce themselves‚ resulting in daughter cells that contain the same amount of genetic material as the parent cell. Interphase Prophase Metaphase Anaphase Telophase Cytokinesis Cell Division Occurs in a series of stages of phases Interphase occurs before mitosis begins Chromosomes are copied (# doubles) Chromosomes appear as threadlike coils (chromatin) at the start‚ but each chromosome and its copy(sister chromosome) change to sister
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Cell Analogy A Nucleus is like the city hall. The Nucleus directs the activities of all organelles. The City 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
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CELL DIVISION REVIEW 1. Name the phase of interphase in which cells copy their DNA. G-2 2. Anaphase 3. Name the phase in which spindle fibers disappear. telephase 4. Put the following cells in the correct order. A interphase B telephase C anaphase D prophase E metaphase 5. centromere 6. DNA that is spread out in the nucleus of a non-dividing cell is called chromatin. 7. Name the phase this cell is in. 8. Name
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provided. 3 4 5 6 TOTAL This document consists of 15 printed pages and 1 blank page. SP (NF/CGW) S86392/2 © UCLES 2005 [Turn over For Examiner’s Use 2 Answer all the questions. 1 Fig. 1.1 is a drawing made from an electron micrograph of a goblet cell from the epithelium of the gas exchange system. mucus ’plug’ vesicle containing mucus A B C Fig. 1.1 (a) Name A to C. A ..........................................................................................................................
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Title: To examine an animal and cheek cell using a compound microscope Date: 25th September 2012 Lab Partner: xxxxxxxxxxxxx Objective: The main aim of this experiment was to prepare a wet mount of human cheek cells and a wet mount of plant cells and examine them both under a compound microscope. Introduction: Cells are the basic units of life which make up every structure in the human body. They are the smallest units which are living. All cells contain different organelles which
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CELL THEORY – STEM CELLS Stem cells are a large focus of study in today’s biomedical world. “They are cells that exist in an undifferentiated state‚ and transform into differing tissue types depending on what the cells surrounding them are‚“ (National Institute of Health‚ 2012). Stem cells have the remarkable potential to develop into many different cell types in the body during early life and growth. In addition‚ they also serve as an internal repair mechanism inside many tissues‚ dividing without
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plasmoylsis and turgor in plant cells Investigation * Get a single layer of plant cells. If you are using red onion‚ cut a 1 cm square from a fleshy piece of onion and then peel off a single layer of the red cells. If you are using rhubarb‚ peel a piece from the epidermis. If you are using toadflax peel a piece of the lower epidermis of a leaf. * Place the strip on a slide and cover it with a drop or two of distilled water. Add a cover slip. * Look at the cells through a microscope. Start
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potentials in neuron and muscle cells c. Secretion and action of hormones and neurotransmitters d. Muscle contraction 9. Osmosis: When more solute particles are added to one side of a container with a selectively permeable membrane‚ which way will the water move? From the side with more water and less solute to the side with less water and more solute. 10. What happens to a patient’s red blood cells when the following solutions are given: a. Hypotonic solution The cell will bust or haemolyse b.
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potentials in neuron and muscle cells c. Muscle contraction d. Secretion and action of hormones and neurotransmitters 9. Osmosis: When more solute particles are added to one side of a container with a selectively permeable membrane‚ which way will the water move? From the left to the right. 10. What happens to a patient’s red blood cells when the following solutions are given: a. Hypotonic solution: Water moves into cells and they expand.
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Biology 12 - The Cell Part A: In ONE sentence‚ in the space provided‚ describe the function of the following organelles. Use point form. Use your own words. Paraphrase and condense the textbook definitions. DO NOT copy any definition or part of a definition. In the box to the left of each definition‚ make a sketch of the organelle. |SEE NOTES |1. cell membrane: control what goes in and out of cell‚ forms barrier with outside environment |
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