Laboratory Experiments in Microbiology (11th Edition)
11th Edition
ISBN: 9780321994936
Author: Ted R. Johnson, Christine L. Case
Publisher: PEARSON
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Chapter 4, Problem 2CT
For a bacterium, what evolutionary advantage is associated with forming a pellicle in a liquid medium?
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Chapter 4 Solutions
Laboratory Experiments in Microbiology (11th Edition)
Ch. 4 - What other methods can be used to determine...Ch. 4 - What is the primary use of slants? Of deeps?...Ch. 4 - What is the purpose of heating the loop before...Ch. 4 - Prob. 4QCh. 4 - Why is aseptic technique important?Ch. 4 - Why was the arrangement of Lactococcus in the...Ch. 4 - For a bacterium, what evolutionary advantage is...Ch. 4 - How can you tell that the media provided for this...Ch. 4 - Your microbiology lab maintains reference...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- In a dark cave, you discover a microscopic creature growing by stripping electrons from Cu+ (cuprous copper) and fixing atmospheric carbon. Your new pet, "Little Blue", is a: a) Chemoautotroph b) Chemoheterotroph c) Photoautotroph d) Photoheterotropharrow_forward26. Plant cells placed in an isotonic solution would a) become less turgid b) become turgid c) undergo plasmolysis d) remain the same e) swellarrow_forwardA cell that utilizes light to obtain energy from organic carbon sources such as glucose would be called a O 1) lithoautotroph. O 2) chemoautotroph. O 3) photoautotroph. 04) O 4) photoheterotroph. O 5) chemoheterotroph.arrow_forward
- Which of the following is typically found in aquatic bacteria, especially among phototrophic types, and used for positioning in the water column A) O gas vesicle B) O sulfur granules C) O nanotubules D) Oglycogen E) O metachromatic granulesarrow_forwardWhat general type of growth medium would you use to: (a) grow one type of bacteria but inhibit the growth of another type? (b) discriminate between different types of bacteria?arrow_forwardHeterotophs... a) do not require a carbon source. b) use organic compounds, like starch, as a carbon source. c) use carbon dioxide as their carbon source. d) require light for metabolic reactions.arrow_forward
- Microorganisms that require carbon dioxide for growth are called: * A)Psychrophiles B)Capnophiles C)halophiles D)Mesophilesarrow_forwardThe prokaryote cell type is associated with the following structures EXCEPT? a) ribosomes, b)mesosomes c)nucleoid area d) peroxisomes and liposomes e) chlorophyll and explain why?arrow_forwardwhich of these are important in creating biofilms? (select all that apply) choose the correct answer. A) GLYCOCALYX B) FLAGELLA C) ARCHAELLA D) AXIAL FILAMENTS E) FIMBRIAEarrow_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_forwardIn a biological production process, bacteria with spore-forming ability are immobilized on a support surface. Once a batch of production is done, these cells along with their support material are separated from the medium, and then sterilization is performed in a furnace for safe disposal of material into the environment. An important issue here is to ensure ALL bacteria, including any spores that may form and those that are located at the center of the spherical support material, are killed with heat. For this purpose, the temperature at the center of the spherical support material must reach the designated killing temperature. The support material is a sphere with 3 cm diameter and a heat capacity of 4.0 kJ/kg*K, a density of 800 kg/m³, a thermal conductivity of 0.7 W/m*K. The heat transfer coefficient of the surrounding air is 14 W/m2*K. If the initial temperature inside the furnace prior to the start of sterilization is 15 °C, how long should the procedure last to obtain sterile…arrow_forwardWhy do many bacteria grow over a wide range of temperature?arrow_forward
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