Important Questions of this chapter: **Definition Cell cycle 2. Homologous Chromosome 3. Sister Chromatid 4. Synapsis **Short Questions 1.Describe the chief events of mitosis and show how these differ from meiosis. (V.V.I.) 2. What ‘checkpoints’ occur in cell cycle? What is the role of each? **Long Questions 1.Describe the phases of the cell cycle and the events that characterize each phase. Answer of short Definition is given below 1. Cell Cycle: The cell cycle is an orderly
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Chapter 2: Neurons and Glia 1. Introduction * Although there are many neurons in the human brain (about 100 billion)‚ glia outnumbers neurons by tenfold. 1:10 ratio. * Neurons are the most important cells for the unique functions of the brain. * Neurons sense changes in the environment‚ communicate these changes to other neurons‚ and command the body’s responses to these situations. * Glia‚ or glial cells‚ are thought to contribute to brain function mainly by insulating‚
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Chapter 8 Vocabulary- Marisa Brueggemann anaphase- Anaphase is the stage of a cell division (mitosis or meiosis) when the chromatids (or homologous chromosomes in meiosis one) are separated and start to move away from each other. anchorage dependence- In order for a cell to resume its divisions it must be touching something else. asexual reproduction- New cells are generated through the process of mitosis (or binary fusion in the case of bacteria). These new daughter are exactly the same as
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plant most of its structure and support‚ the cell wall also bond with other cell walls to form the structure of the plant. Centrosome may be also referred to as the "Microtubule organizing center" it’s looks like a small body near the nucleus having a dense center and radiating tubules‚ here in the centrosome is where the microtubules are made. Chloroplast is a CD shaped organelle that holds the plants chlorophyll‚ Photosynthesis takes place in the chloroplast. Cytoplasm is a jell like material
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pair with their homologs. 9. What are the two ways in which meiosis brings about genetic recombination and which stage or stages of meiosis is responsible? 10. Why can two paired homologs be described as a tetrad? 11. How many kinds of microtubule make up the mitotic spindle? 12. How do sister chromatids compare to each other? 13. Draw diagrams of chromosomes that are metacentric telocentric acrocentric
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Bio 93 Review Sheet: 1. Understand all the THEMES presented in the introductory lecture (lec 1). 2. What is an open system? Energy in and out‚ comes in and leaves as heat 3. What are the 4 most important elements in the human body? C‚ O‚ N‚ H 4. Draw the periodic square for Helium. How many valence electrons does it have? How do you figure this out using the periodic table? Two valence e-‚ 23He‚ all the way right full shell only holds two electrons 5. What is an isotope? How are they used
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* Topic 2: Cells * 2.1 Cell theory * 2.1.1 * Outline Cell Theory 1. All living organism are composed of cells 2. Cells come from pre-existing cells 3. Cells are the smallest unit of life * * 2.1.2 * Discuss the reasons for cell theory 1. When organism are looked at under a microscope‚ they are consistently made up of cells 2. Cells carry out asexual reproduction – called Mitosis 3. Cells are the smallest unit of organisms that can carry out all
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The Cellular Basis of Reproduction and Inheritance Chapter 8 Order Reproduction Growth and development Energy processing Response to the environment Regulation Evolutionary adaptation http://www.youtube.com/watch?v=46Xh7OFkkCE Introduction Cancer cells start out as normal body cells undergo genetic mutations lose the ability to control the tempo of their own division run amok‚ causing disease In a healthy body‚ cell division allows for: growth the replacement of damaged cells development from
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inside the nucleus composed of RNA for ribosome formation. Spindle – microtubule structure that brings about chromosome movement during cell division. Chromatids – two identical parts of a chromosome following DNA replication. Centromere – site where sister chromatids are held together. Centrosome – central microtubule-organizing center of cells. Centriole – short cylindrical organelle in animal cells that contains microtubules and is associated with the formation of the spindle. Spindle – a
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reason why the cytoskeleton is not the most important organelle….. that’s what I thought. WHat do these 3 parts do? Microtubules- are hollow tubes made of the protein called tubulin. This tubulin contains two different sub-units. The microtube holds all organelles in place so without this the organelles will collide with each other or float around randomly. The microtubules also act as tracks for the organelles to move. Microfilaments- are long threads of the protein actin which wrap around
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