Gene expression is the ability of a gene to produce a biologically active protein. This process is regulated by the cells of an organism‚ it is very important to the survival of organisms at all levels. This is much more complex in eukaryotes than in prokaryotes. A major difference is the presence in eukaryotes of a nuclear membrane‚ which prevents the simultaneous transcription and translation that occurs in prokaryotes. Initiation of protein transcription is started by RNA polymerase. The activity
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want to make Eukaryotic cell proteins? * Because when eukaryotic proteins are expressed in prokaryotic cells problems like been unstable‚ no biological activity and prokaryotic contaminants ( pyrogens) can occur. * Also to make the protein as natural as possible * The same expression vectors as we need for pro * We don’t need shangdolron coz that only for pro Transformation: in Eukaryotic cells: in humans means that difference in growth characters of cells‚ for example
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8.1.1 The Eukaryotic cell cycle 1. If a cell is in a state in which it no longer divides then the cell is probably arrested at which stage of the cell cycle? A) G1 2. Interphase of the cell cycle lasts longer than mitosis? A) TRUE - A cell spends about 90% of its life in interphase of the cell cycle‚ while it spends only about 10% of its life in M phase. 3. When does DNA replication occur in the cell cycle? A) Interphase 4. Which statement about the cell cycle is incorrect? C) In G2
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function of each of the eukaryotic organelles. ”A eukaryotic cell is sectioned by internal membranes into different functioning categories called organelles. For example‚ the nucleus houses DNA‚ the genetic component that controls the cells activities. (Boundless. “Introduction” Boundless Biology). The Cytoplasm is the material between the cell membrane and the nucleus. It has a lot of responsibilities within the cell. It contains enzymes for breaking down waste and also gives the cell its shape. The Nucleus
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Exercise 13 MITOSIS: REPLICATION OF EUKARYOTIC CELLS ANSWERS TO QUESTIONS 1. a. Mitosis and cytokinesis are often referred to collectively as "cellular division." Why are they more accurately called cellular replication? The result of mitosis is production of two cells (replicates) identical to the parent cell. The genetic material is replicated rather than divided. b. Does the cell cycle have a beginning and an end? The organization of our study of cellular events indicates a beginning and
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Eukaryotic Cell Division Cells must continually grow and divide in order for an organism to grow‚ maintain its structure‚ and reproduce. Cell division involves the replication‚ or copying‚ of the complete set of hereditary information. It also involves the equal distribution of the genetic material in the resulting cells. The hereditary information of organisms is contained in large molecules called deoxyribonucleic acid‚ DNA. Objectives Upon completion of this laboratory
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Describe the key structures and functions of a eukaryotic and prokaryotic cell. Eukaryotic Cell (1) There are many organelles in the eukaryotic cell micrograph above. Some of these organelles are displayed in the prokaryotic micrograph and so‚ I have described the shared organelles in the prokaryotic micrograph section. Mitochondria The mitochondria cells break down nutrients which then creates energy. They act like a digestive system. This process is called cellular respiration. The
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Functionally‚ eukaryotic genomes can be described as much larger and more complex than prokaryotic genomes. This means regulation is a lot more demanding and intensive within the eukaryotic genome. Due to its complex nature‚ eukaryotic gene regulation can bring genetic changes in its product that affect gene expression‚ phenotypic outlook‚ and advances in biotechnology. This can be thought of as an evolutionary advantage to organisms in an unstable environment. Gene regulation in eukaryotes is a
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In prokaryotes‚ it’s easier to make DNA replication because of the lack of a nucleus‚ but to do DNA replication in a eukaryotic cell is more difficult. DNA of an eukaryotic cell is in chromatin form to fit into the small nucleus for the replication to occur‚ first the DNA should open. This is because it is harder for eukaryotes to carry out DNA synthesis. Replication of DNA in a prokaryote is different from a eukaryote. In a prokaryote they have a single origin where the replication process starts
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Prokaryotic and eukaryotic cells are both vital to our world today. Prokaryotic cells are simple‚ yet the oldest‚ and were known to evolve around 3.5 billion year ago. Eukaryotic cells are more complex and have been said to appear on Earth 2.5 billion years ago. It is sort of like people or characters in movies. You see them one year and basically understand what they’re doing or going through and then a year or two from now they seem like they become more complicated to understand. That’s just
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