Use the key words to answer Q1-Q5 (Bacteria, Fungi, Virus, Prions, Algae) Member
ID: 83104 • Letter: U
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Use the key words to answer Q1-Q5 (Bacteria, Fungi, Virus, Prions, Algae) Members of this group have caused "mad cow disease" and Creutzfeldt-Jakob disease. Members of this group are photosynthetic include unicellular and multicellular forms, and are the foundation of aquatic food chains. This group includes beneficial microorganisms that fix nitrogen, make antibiotics, vitamins and enzymes, as well as harmful microorganisms that cause disease such as plague and strep throat. Members of this group include decomposers, associate with plant roots and help plants grow produce antibiotics, help bread rise, and help make wine. Members of this microbial group cause serious diseases such as smallpox, AIDs, and Ebola fever Three the SSU rRNA sequences of 3 organisms have been compared. For organisms 1 and 2, two of the twelve nucleotides in the sequence are different. For organisms 1 and 3, six of the twelve nucleotides are different which organism has greater evolutionary distance from organism 1? a organism 2 b. organism 3. c. The evolutionary distance is the same. d. Evolutionary distance cannot be predicted from this data. If the objective lenses of a microscope can be changed without losing focus on the specimen, they are said to be a. totifocal. b. optifocal. c. parfocal. d. equifocal. Which type of microscopy would be preferred for creating a three-dimensional view of the distribution and arrangement of flagella on a bacterial cell surface? a. fluorescence microscopy b. Scanning electron microscopy c. Transmission electron microscopy d. Bright-field microscopy As the magnification of a series of objective lenses increases, the working distance a. decreases b. increases. c. stays the same. d. cannot be predicted. You are researching the structure of a transmembrane protein. Which type of microscopy would provide you the best view of this protein?Explanation / Answer
Answer 1: Prions (As explained below)
Bovine encephalitis or mad cow syndrome and Creutzefelt-Jakob disease is caused by a new type of infectious entity made up entirely of proteins and called as prions.
Answer 2: Algae (As explained below)
These are chlorophyll containing unicellular or multicellular organisms that play an important role in the food chains and have been attributed with the presence of oxygen on our planet.
Answer 3: Bacteria (As explained below)
Bacteria in the soil are known to fix nitrogen. Several antibiotics are made from bacteria. Lactobacillus casei Shirota is employed for making probiotic Yakult. Also, bacteria are known for their harmful effects. Bacteria Yersinia pestis and Streptococcus are known to cause plague and strep throat.
Answer 4: Fungi (As explained below)
Many fungi thrive by decomposing the dead remains of plants and animals and hence are referred to as decomposers. They also help plants to grow. Fungi like yeast is widely used in baking industry due to its property to cause the bread to rise. Wine is fermented with the use of fungi.
Answer 5: Virus (As explained below)
Viruses like Variola virus, HIV/ Herpes virus and Ebola virus of Filoviridae family are known to cause diseases like smallpox, AIDS and Ebola fever, respectively.
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