Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 26, Problem 6TYK
Summary Introduction
Introduction:
Bacteria are prokaryotic organisms that do not have a well-defined nucleus and an endomembrane system. They are classified as heterotrophs or autotrophs on the basis of their nutrition, as aerobes or anaerobes on the basis of their ability to survive in aerobic conditions, and as gram-positive or gram-negative on the basis of their ability to retain the
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A bacterium has the following characteristics:∙ It adheres to the human intestinal lining using a feature that protects it from phagocytes, bacteriophages, and dehydration∙ It can survive being boiled∙ It contains no plasmids and relatively little peptidoglycanWhich of the following characteristics allows this bacterium to adhere to the intestinal lining?
Group of answer choices
A. fimbriae
B. pili
C. an endospore
D. a flagellum
Which of the following statements correctly describes exotoxins and endotoxins produced by various bacteria?
A. endotoxins are secreted into the environment while the bacteria are still alive
B. exotoxins are secreted into the environment while the bacteria are still alive
C. exotoxins are only released into the environment when the bacteria die and their cell walls break down
D. exotoxins are components of the outer membrane of the bacteria that produce them
Which of the following is NOT a characteristic for bacteria in general?
a. Plasma membrane has no saccharide units
b. Sterols is one of its major outer membrane component
c. Genome present in the nucleiod region of the cytosol
d. Granules are mostly polysaccharide in nature
Chapter 26 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 26.1 - Prob. 1SBCh. 26.1 - Prob. 2SBCh. 26.1 - Prob. 3SBCh. 26.1 - Prob. 4SBCh. 26.2 - What is a biofilm? Give an example of a biofilm...Ch. 26.2 - Prob. 2SBCh. 26.2 - Prob. 3SBCh. 26.3 - Prob. 1SBCh. 26.3 - Prob. 2SBCh. 26.3 - Prob. 3SB
Ch. 26.3 - Prob. 4SBCh. 26 - Prob. 1TYKCh. 26 - A bacterium that uses nitrites as its only energy...Ch. 26 - Prob. 3TYKCh. 26 - At the health center, a fecal sample was taken...Ch. 26 - Which of the following is not a property of an...Ch. 26 - Prob. 6TYKCh. 26 - Penicillin, an antibiotic, inhibits the formation...Ch. 26 - Prob. 8TYKCh. 26 - Prob. 9TYKCh. 26 - Prob. 10TYKCh. 26 - Prob. 11TYKCh. 26 - Prob. 12TYKCh. 26 - Prob. 13TYKCh. 26 - Prob. 14TYKCh. 26 - Prob. 1ITDCh. 26 - The proteobacteria in the genus Pseudomonas are...
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- Which of the following pairs is mismatched? a. catalase: hydrogen peroxide production b. bactericidal permeability-increasing protein: binds LPS and kills Gram-negative bacteria c. elastase: basement membrane degradation d. NADPH oxidase: superoxide radical production e. gelatinase: iron sequestration f. paracrine: acts on neighboring cells.arrow_forwardWhich of the following statement about the bacterial cell wall is INCORRECT? a. The cell wall is relatively nonpermeable and restricts the passage of sugars and amino acids. b. Gram-positive cells have more peptidoglycan in theircell walls than Gram-negative cells. c. Gram-negative cells have a membrane both inside andoutside their cell walls. d. The cell wall establishes a bacterium’s shape as a coccus,bacillus, or spirillum.arrow_forwardA bacterium has the following characteristics: I. It adheres to the human intestinal lining using a feature that protects it from phagocytes , bacteriophages, and dehydration. II. It can survive being boiled. III. It contains no plasmids and relatively little peptidoglycan. Which of the following characteristics allows this bacteria to survive in a human who is taking penicillin pills? A. gram-negative cell wall B. peptidoglycan in the cell wall C. lipopolysaccharides in the cytoplasm D. long polypeptides in the cell wallarrow_forward
- Compare the following features of bacteria to those of eukaryotic microorganisms: a. size. b. organization of genetic material. c. ribosomes. d. cell wall. e. respiration and photosynthesis. f. motility mechanisms.arrow_forwardHow do Gram-negative bacteria differ from Gram-positivebacteria?a. They are not pathogenic.b. Their peptidoglycan cell wall is thinner.c. Gram-negative bacteria cannot be Gram stained.d. They possess a single plasma membrane.e. Gram-negative bacteria do not photosynthesize.arrow_forwarda) Biofilm is: a. a complex established community of microorganisms on solid surfaces b. is a layer of millions of identical bacteria on solid surfaces c. is a layer of compounds released from the tissue as a protection against pathogenic microorganisms d. All of these are correct b) Capsule formation is associated with the virulence of pathogenic bacteria. Why? Select all that apply. a. They are sticky and attach better b. They can escape phagocytosis c. The capsule makes them grow/multiply faster d. They kill immune cellsarrow_forward
- Match the microorganism to the best description of its cell wall component. A. Lacks cell wall , B.Made of cellulose photosynthetic , C.Composed of peptidoglycar , D.Protein coat with additional membranes. , E.Composed of chitin Algae Virus Fungi Protozoa Bacteriaarrow_forwardWhich of the following is a primary bacterial cell wall function?a. transport c. supportb. motility d. adhesionarrow_forwardWhich of the following bacteria would have the above cell boundary structure? A. Mycobacterium B.Clostridium C. Mycoplasma D. Borreliaarrow_forward
- Endospores : A. are a dormant form of a bacterium AND are formed by members of medically relevant groups of bacteria. B. are a form of reproduction AND are formed by members of medically relevant groups of bacteria. C. are a dormant form of a bacterium AND are involved in anaerobic respiration. D. are formed by members of medically relevant groups of bacteria AND are involved in anaerobic respiration.arrow_forwardAn infectious dose of several million cells in enteric infections seems like a lot. a. In terms of the size and abundance of microbes, could you see a cluster containing that many cells with the naked eye? b. About how long would it take an average bacterial species to reach the infectious dose of a million cells starting from a single cell? c. Why do enteric diseases require a relatively higher infectious dose than nonenteric diseases? d. Explain why antimicrobic therapy used on gram-negative bacterial infections could actually lead to illness rather than cure itarrow_forwardBacteria that can survive in extreme environments are called: a-Anaerobes b-Saprophytes c-Aerobes d-Archaebacteriaarrow_forward
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