Bio Review – Cells Cell Theory 2.1.1 * All living things are made of cells * Smallest unit of life * Existing cells from pre-existing cells * Contain a blueprint for growth‚ development‚ behavior * Site of all chemical rxns 2.1.2 * Abiogenesis * Living from non-living matter * Robert hook * Compound microscope + observed cork “cells” * Anthony van Leeuwenhoek * Observed blood cells and other “living” cells * Louis Pasteur * Proved
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by the plasma membrane. The cytoplasm provides the site for metabolic activity and helps transport molecules and organelles. The cytoskeleton is a supportive and metabolic structure composed of microfilaments‚ microtubules and intermediate filaments‚ which are all protein. The microtubules aid in the shape of the cell. Microfilaments are responsible for movement of cells and organelles‚ an example of this is flagella‚ a few long projections of microfilaments from the cell surface‚ and this helps
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protein and fat that surrounds the cell. The cell membrane is semipermeable‚ allowing some substances to pass into the cell and blocking others. centrosome - (also called the "microtubule organizing center") a small body located near the nucleus - it has a dense center and radiating tubules. The centrosome is where microtubules are made. During cell division (mitosis)‚ the centrosome divides and the two parts move to opposite sides of the dividing cell. The centriole is the dense center of the centrosome
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The studies of Robert Hooke 1665 into a plant material would allow the determination of a pore like regular structure surrounded by a wall of which he called cells’ this in itself unbeknownst to him‚ was the discovery of the fundamental unit of all living things. In 1838 a botanist called Schleiden derived the theory The basic unit of structure and function of all living organisms is the cell.’ Over 150 years later this can be regarded as one of the most familiar and important facts within the
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their original length‚ now clearly visible when a stain is added. The centrioles move to the opposite poles of the cell and small microtubules around the centrioles become visible (called "Asters"). The nuclear membranes and nucleolus disintegrate after passing their nucleic acids to certain pairs of chromatids. Now a spindle forms‚ this is also made out of microtubules. [A labelled diagram of the end of the Prophase stage of a cell here would be great.] Metaphase ---------------------------------------
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Biology‚ 7e (Campbell) Chapter 6: A Tour of the Cell Chapter Questions 1) All of the following are part of a prokaryotic cell except A) DNA. B) a cell wall. C) a plasma membrane. D) ribosomes. E) an endoplasmic reticulum. Answer: E Topic: Concept 6.2 Skill: Knowledge 2) The volume enclosed by the plasma membrane of plant cells is often much larger than the corresponding volume in animal cells. The most reasonable explanation for this observation is that A) plant cells are capable
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7-2 Notes Eukaryotic Cells 1. Eukaryote cells are divided into two parts Nucleus Cytoplasm Portion outside the nucleus where organelles reside Nucleus 2. Contains most of the cell’s DNA 3. DNA is the code for making proteins 4. Surrounded by a double membrane called the nuclear envelope 5. Contains chromatic‚ which consists of DNA bound to protein Condenses during cell division to form chromosomes 6. Nucleolus – small dense region in nucleus where the assembly of ribosomes begins Ribosomes 7. Small
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Results Mortality rates‚ clinical signs and postmortem findings Mortalities in all groups were recorded throughout the experiment and summarized in Table 1. No mortalities were recorded in the control group throughout the experimental period. Table 1 show that the highest mortality rate occurred in Nile tilapia fish in the S. iniae+ C. albicans infected group (76.19%)‚ followed by those infected with S. iniae alone (61.9%) and then the C. albicans infected group (57.14%). Clinically‚ the S. iniae-infected
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What are the most prominent differences between the processes of Meiosis and Mitosis‚ and how do they ultimately affect the end results? The most prominent difference between the process of Meiosis and Mitosis is the number of divisions involved: Mitosis only has one major division whilst Meiosis has two. The divisions affect the overall outcome because they have a direct correlation to the number of daughter cells produced-- which is to say‚ the more divisions a cell undergoes‚ the more daughter
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Human Anatomy & Physiology‚ 7e (Marieb) Chapter 3 Cells: The Living Units MATCHING QUESTIONS [pic] Figure 3.1 Using Figure 3.1‚ match the following: 1) Second messenger. Answer: E Diff: 1 Page Ref: 84; Fig. 3.16 2) G protein. Answer: D Diff: 1 Page Ref: 84; Fig. 3.16 3) Ligand. Answer: A Diff: 1 Page Ref: 84; Fig. 3.16 4) Enzyme. Answer: C Diff: 1 Page Ref: 84; Fig. 3.16 5) Cyclic
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