separates eukaryotes from prokaryotes is the presence of _______ in eukaryotic cells. A) ribosomes B) oxidative phosphorylation C) DNA molecules -D) a nucleus 2. Cytoplasmic organelles are - A) absent in prokaryotic cells; present in eukaryotic cells. B) present in both prokaryotic and eukaryotic cells. C) present in prokaryotic cells; absent in eukaryotic cells. D) absent in both prokaryotic and eukaryotic cells. 3. Eukaryotic chromosomes contain _______ DNA molecules. A) single
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Cells of the body are organized into four fundamental tissues; epithelial‚ connective‚ muscle and nerve. Epithelial tissues line all surfaces of the body: the skin‚ cavities‚ ducts‚ vessels. They are named according to the cell shape on the free surface. Cells of a tissue are held together by the basement membrane and intercellular fibbers. These tissues receive their nutrition by diffusion‚ for they are without blood vessels. Simple squamous epithelium lines all blood and lymphatic vessel‚ including
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Chapter 5 Membrane Structure and Function Winter wheat is planted in the early fall‚ grows over the winter when the weather is colder‚ and is harvested in the spring. As the temperature drops from fall to winter‚ the makeup of the plasma membrane of winter wheat changes. Unsaturated fatty acids replace saturated fatty acids in the phospholipids of the membrane. Why would colder weather select for the different lipid makeup in the plasma membrane? An abstract in the Canadian Journal of Botany
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This paper will explain the process of Extracorporeal Membrane Oxygenation (ECMO)‚ its original intended purpose‚ new advancements in the process‚ and complications post ECMO. It will also examine the origin of the process and how it differs from other types of life support. The professional nurse takes ownership in the well being and safety of the client‚ and as such has a responsibility to become well informed in the processes‚ equipment‚ and technologies that make it possible for the client to
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Sickle cell disease is present usually in those of African or Mediterranean descent (Saladin 2007). About 1.3% of African Americans have sickle cell (Saladin‚ 2007). Sickle cell was originated in Africa where malaria was killing a vast number of people (Saladin‚ 2007). The sickle cell hemoglobin is not able to be digested by the parasites that cause malaria‚ making those with sickle cell resistant to malaria (Saladin‚ 2007). This paper will discuss a normal erythrocyte compared to an erythrocyte
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Cell Fractionation: Isolation of Mitochondria from Cauliflower and Determination of Specific Enzyme Kinetics Introduction Mitochondria is an organelle found in eukaryotic cells that play a role in biochemical processes such as respiration and energy production. Mitochondria even play an important role in apoptosis‚ or programmed cell death. This is achieved by disruption of electron transport‚ oxidative phosphorylation‚ and ATP production or even the release of proteins that trigger activation
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Science 9-Biology Observing Cell Division Lab Purpose: To use the microscope to observe and sketch plant cells and animal cells in various stages of the cell cycle. Equipment and Materials: Compound Microscope Laptops Prepared Slide of Onion (Allium) Root Tips Prepared Slide of Whitefish Mitosis BC Science 9 Text pg. 162-163 Part 1-Plant Cells Procedure: 1. Take a prepared slide of an onion tip root and observe it under low power
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The Effect of catalase reaction on temperature Table of Contents: Bibliography ………………………………………………………………………………………………….. Page 1 Introduction……………………………………………………………………………………………………Page 2-3 Methods/ Procedures……………………………………………………………………………………..Page 4-5 Results ………………………………………………………………………………………………………….. Page 6 Analysis of Data ……………………………………………………………………………………………. Page 6 Graph …………………………………………………………………………………………………………... Page 7 Conclusion……………………………………………………………………………………………………
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support‚ move‚ and protect the body; they also give us our features. But without bone cells we would have no bones. Bone cells are the living units that make up your bones and keep them functioning. Bone cells have two major roles‚ which are the production of new bones and resorption or destruction of old bone. They also carry out other small roles. There are four main types of bone cells: Osteogenic‚ which are bone cells that respond to traumas‚ osteoblasts‚ which form bone matrix around themselves by
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Effect of Temperature on Enzymes ~Abstract~ In this experiment the effect of different types of temperatures on enzyme activity was examined. The temperature baths that were used to test the difference in enzyme activity on fresh liver were; 4 °C‚ room temperature which was 22°C‚ body temperature which is 37°C‚ and 77°C. The total time of each trial was 2 and a half minute‚ 1 minute for the H2O2 to acclimatize to the temperature‚ 1 and a half minutes for the reaction to occur. Catalase causes Hydrogen
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