plasma membrane to power the movement of the flagellum. Eukaryotic cells have a completely different kind of flagellum‚ consisting of a circle of nine microtubule pairs surrounding two central microtubules. It has a whip movement rather than a rotate movement. Today the cells of many no longer maintain flagella but rather a similar short microtubule cilia. Cilia can be used to move cell and move fluids through water. In the bacterium‚ the chromosome consists of a single naked circle of DNA. In eukaryotes
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Fish phylogenetic tree based on protein size Amanda Reed Lab partners: Lecia Redwine‚ Kyle Hatcher TA: Baneshwar Singh Biology 117‚ Section 25 Tuesday 10:30 AM Introduction Although tree diagrams have been used since the days of Charles Darwin‚ biologists have only recently adopted the tree model of evolution to read and interpret phylogenies. One of the reasons for this is the confusion that often arises from using a tree model to describe a phylogeny (Baum‚ 2008a). Many people interpret
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Name_______________________Period___________ Chapter 6: A Tour of the Cell Concept 6.1 Biologists use microscopes and the tools of biochemistry to study cells 1. The study of cells has been limited by their small size‚ and so they were not seen and described until 1665‚ when Robert Hooke first looked at dead cells from an oak tree. His contemporary‚ Anton van Leeuwenhoek‚ crafted lenses and with the improvements in optical aids‚ a new world was opened. Magnification and resolving power limit
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NEURONAL DIVERSITY - Categories of neurons of CNS: 1. Afferent/ sensory neurons – convey information from periphery to CNS 2. Motor- sends commands to muscles and glands 3. Interneurons – most abundant signalling elements in the CNS ( process information locally or convey information from one region of CNS to another • Types: a. Local interneurons/ internuncial neurons/ local circuit neurons – short axon Golgi type II (greatly outnumber type I in CNS)
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4.3 Theoretical genetics 4.3.1 Define genotype‚ phenotype‚ dominant allele‚ recessive allele‚ co-dominant alleles‚ locus‚ homozygous‚ heterozygous‚ carrier and test cross * Genotype- the alleles of an organism * Phenotype- the characteristics of an organism * Dominant allele- an allele that has the same effect on the phenotype whether it is present in the homozygous or heterozygous state * Recessive allele- an allele that only has an effect on the phenotype when present in the
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Name: Danielle Sposeto Date: 05-12-2013 Instructor’s Name: Lee Ott Assignment: SCIE207 Phase 2 Lab Report Title: Animal and Plant Cell Structures Instructions: Your lab report will consist of the completed tables. Label each structure of the plant and animal cell with its description and function in the tables provided. When your lab report is complete‚ post it in Submitted Assignment files. 1. Animal Cell: Observe the diagram showing the components of an animal cell. Using
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Chapter 6: A Tour of the Cell Cell fractionation – cells are taken apart using a centrifuge (differential centrifugation) and separated into their sub cellular structures Point of Difference | Eukaryotic | Prokaryotic | Shape/Size | Larger | Smaller | Complexity | Membrane bounded organelles | No membrane bound organelles | Nucleus | Bounded membrane with DNA | DNA in a region (nucleoid) | Kingdom | Plants‚ animals‚ fungi‚ protists | Bacteria and archaea | Reproduction | Sexual reproduction
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is made of protein and ribosomal DNA (rDNA) sequences of chromosomes. Plant cells also have a cytoskeleton‚ an internal protein scaffold that supports the cell. The cytoskeleton is composed of microtubules and microfilaments. Microfilaments are solid rods made of globular proteins called actin. Microtubules are straight‚ hollow cylinders are found throughout the cytoplasm of all eukaryotic cells and carry out a variety of functions‚ ranging from transport to structural support. This type of eukaryotic
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denotes a disease or disorder. A proteinopathy is any disease caused by a malformed protein. 2. Where are tau proteins found? What do they do here? Tau proteins are found inside of nerve cells. Tau proteins perform the function of stabilizing microtubules. 3. What is an isoform? How many tau isoforms are there in the brain? An isoform is a protein that has the same function as another protein but is encoded by a different gene and may have small differences in its sequence. There are 6 tau isoforms
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1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 2015SP-BIOL-1408-43440 Biology for Non-Science Majors I_Pebble Barbero EXAM ONE Cheating Question – I acknowledge I won’t cheat. You expose the bacteria Staphylococcus aureus to low levels of antibiotic methicillin. The surviving bacteria are then exposed to higher concentrations of methicillin and the process repeated until a strain of methicillin-resistant S. aureus (MRSA) was generated. To test your hypothesis‚ you perform an experiment
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