Concept explainers
To explain:
The groups of microbes which are most similar to prokaryotic cell and the related evidences which prove that these microbes are not prokaryotes.
Concept introduction:
All organisms are divided into prokaryotes and eukaryotes. Prokaryotes are characterized by the absence of well defined nucleus which is not enclosed by nuclear membrane. Prokaryotes also lack membrane bound cell organelles. Members of parabasalids belong to Excavata group of protists and are anaerobes in nature. Microsporidia belongs to group of obligate parasitic fungi and infects various types of animals and protists including human beings. Galdieria belongs to group red algae and is commonly found in aquatic environment.
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Brock Biology of Microorganisms (15th Edition)
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- In the domain system of classification, prokaryotes are divided into two domains: Bacteria and Archaea. The two domains differ in all BUT one feature. Which feature do they have in common? Question options: They both have identical cell walls. They both have prokaryotic cells. They both thrive in extreme environments. They both are able to live only under anaerobic conditions.arrow_forwardThe microbes discovered in Lake Whillans and Pitch Lake represented a few of the general categories of microbial life. Drag the images and/or descriptions to their corresponding class to test your understanding of the main types of microbes. Used by humans in the production of some antibiotics Ciliate Prokaryotic organisms used in genetic engineering due to their simple genetic material Photosynthetic organisms that may be used to produce alternative fuels Require electron microscopy for visualization Spores Bacilli Cysts in tissue Photosynthefic Bacteria Protozoans Fungi Viruses Helminths Algae Source: CDC Source: CDC Source: National Human Genome Reasearch Institute Source:Dr. Libero ajello/CDC Resetarrow_forwardWhy are large parasitic worms included in studies of microbes? All parasitic organisms are classified as microbes. They always live in symbiotic relationships with other microbes. They do not share a common ancestor with other animal groups. Their life cycle resembles that of protozoans. Proper identification of them often involves an analysis of microscopic eggs and larvae.arrow_forward
- Microbiologists have announced the discovery of over 30 new species of bacteria that thrive between the teeth and gums of humans. The bacteria could not be grown in the researcher's laboratories, nor were any of them ever observed via and kind of microscopy. If they couldn't culture them or see them, how could the researchers know they discovered a new species? If they couldn't examine the cells for the presence of a nucleus, how did they determine that the organisms were prokaryotes and not eukaryotes?arrow_forwardcreate your own drawing that provides the types of microorganisms within each category and compares the size of cellular and acellular microorganisms. You must include two microorganisms per category - your submission must demonstrate your understanding of how the sizes and structure of these microorganisms help to classify them as cellular or acellular by adding a brief statement at the bottom of the drawing describing cellular vs acellular please help!arrow_forwardBelow are three statements - two of which are truths and one is a lie. Which of the following statements is a lie? Select one: a. Although both prokaryotes and eukaryotes have a plasma membrane that protects them from their surrounding, many of the extremophiles are prokaryotic and only a few are eukaryotic. b. Despite different in appearance, nerve and muscles cell have the same genetic material and the same ability to produce electrochemical impulses. c. Although very few in numbers, there are special prokaryotes that have a membrane-bound nucleus.arrow_forward
- In the diagram below, identify the structures of a cyanobacterial cell based on the following descriptions: a) Outer cellular covering which includes: Mucilaginous layer – outermost layer covering the cell wall; protects the cell from harmful factors of the environment Cell wall – found just below the mucilaginous layer; 2 or 3-layered, the inner layer lies in between the outer wall layer and plasma membrane; the outer layer is made of peptidoglycan Innermost plasma membrane – selectively permeable membrane enclosing the cytoplasm b) Cytoplasm – found below the plasma membrane; the protoplasm which contains structures of different shapes and functions. Lamellae, which contain pigments such as chlorophylls, carotenes, xanthophylls, phycoerythrin and phycocyanin, are located in the peripheral region of cytoplasm. Ribosomes may also be found scattered in the cytoplasm. c) Nucleic material – the nucleoplasm that is centrally located in the cell and contains chromatin in the form…arrow_forwardA bacteria cell which is longer than it is wide is classified as: Vibrio Coccus Bacillus Bacteria which normal colonize the human gut are classified as: Anaerobes Pathogens Aerobes A bacteria which absolutely needs oxygen to live is classified as: Obligate anaerobe Obligate aerobe Facultative anaerobe The structure on this list which will NOT be found in any bacterial cell is: Cytoplasm Flagella Nucleus The genetic information of bacteria cell is contained in the: Capsid Nucleoid Ribosomes The genetic material of a virion is called the: Genome Nucleoid Nucleusarrow_forwardYour friend Jim Crackcorn has developed a new antibiotic that damages the integrity of the cell wall by breaking down peptidoglycan. Jim tells you that he predicts that gram positive bacteria, gram negative bacteria and archaeal cells will be equally sensitive to this antibiotic. Do you agree with Jim’s prediction? If you agree, explain in your own words why you agree. If you disagree, explain in your own words what you would predict and why.arrow_forward
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