BIOLOGY
5th Edition
ISBN: 9781264104680
Author: BROOKER
Publisher: MCG
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Chapter 27, Problem 7TY
Summary Introduction
Introduction: Bacterial cells have developed various types of structures that helped them to survive under unfavorable conditions. These structures allow them to withstand extreme environmental conditions also.
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What is/are the usual habitat(s) of endospore-forming bacteria that are agents of disease? a. the intestine of animals c. water b. dust and soil d. foods
A 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 wall
What is/are the usual habitat(s) of endospore-forming bacteria thatare agents of disease?a. intestines of animals
b. soil
c. water
d. foods
Chapter 27 Solutions
BIOLOGY
Ch. 27.2 - Core Skill: Connections Look ahead to Section...Ch. 27.2 - Prob. 2CSCh. 27.2 - Structure and Movement Concept Check: Does the...Ch. 27.2 - Prob. 3CSCh. 27.3 - Prob. 1CCCh. 27.5 - Prob. 1EQCh. 27.5 - Prob. 2EQCh. 27 - Which of the following features is common to...Ch. 27 - The bacterial phylum whose members typically...Ch. 27 - Gram-staining is a procedure that microbiologists...
Ch. 27 - Place the following steps in the correct order,...Ch. 27 - What ecological role do cyanobacteria play? a....Ch. 27 - Prob. 6TYCh. 27 - Prob. 7TYCh. 27 - Prob. 8TYCh. 27 - Prob. 9TYCh. 27 - Prob. 10TYCh. 27 - Prob. 1CQCh. 27 - Prob. 2CQCh. 27 - Prob. 3CQCh. 27 - Prob. 1COQCh. 27 - Prob. 2COQ
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- Which of the following is present in certain Gram positive bacteria and functions in resistance? O a. Pili O b. Spores Oc. Cytoplasm O d. Cell wallarrow_forwardWhich of the following is NOT true about bacterial endospores? A. They are produced by bacteria of the genus Bacillus and Clostridium B. They are “resting cells” for survival during adverse environmental conditions C. Resistant to desiccation (drying), heat, and chemicals D. Formed by walling off one end of the bacterial cell and surrounding it with a thick spore coat E. They represent a type of reproduction because their formation results in an increase in the number of bacterial cellsarrow_forwardIdentify the genus that best fits each of the following descriptions: a. This organism can produce a fuel used for home heating and for generating electricity. b. This gram-positive genus presents the greatest source of bacterial damage to the beekeeping industry. c. This gram-positive rod is used in dairy fermentations. d. This gammaproteobacterial genus is well suited to degrade hydrocarbons in an oil spill.arrow_forward
- Define the following terms: a. endotoxin b. periplasmic space c. slime layer d. lipopolysaccharide e. pilusarrow_forward4) Which of the following statements is TRUE? A) Fimbriae are generally longer and less numerous than flagella. B) Fimbriae are involved in genetic exchange between cells. C) Hami are common in Bacteria but not found in Archaea. D) Fimbriae are usually shorter than flagella, whereas pili are involved in genetic exchange.arrow_forwardBacterial cells having flagella attached at both ends of the cell are called:a. bitrichousb. biflagellatedc. lophotrichousd. monotrichouse. peritrichousarrow_forward
- Gram negative bacteria lose crystal violet colour after alcohol treatment because of: Select one: a. Thick lipid layer, and thick peptidoglycan layer O b. Thin lipid content, and thin peptidoglycan layer O c. Thick lipid layer, and thin peptidoglycan layer d. Absence of peptidoglycan layer e. Thin lipid layer, and thick peptidoglycan layer Oarrow_forward. A group of spherical bacteria arranged in a chain-like fashion are: Incorrect Answer: C. Spirochetes Correct Answer: B. Streptococci Rationale:arrow_forwardAbout becterial enzymes, it is CORRECT to affirm that: a). Some becterial enzymes can help the microbe fight the immune system, by destroying lgA.b). Coagulases are enzymes that use the host's fibrinogen and form a semi-solid get that isolates amd protects the bacteria.c). Some bacterial enzymes such as hyaluronidase can help the microble move through the host's tissus by destroying the tissue's components.d). Fibrolysin is an enzymes that can help from blood clots.arrow_forward
- Bacteria of the genus Mycoplasma are distinguished from other bacterial cells by 1) cell walls composed solely of amino acids. O 2) the absence of a cytoplasmic membrane. O 3) the absence of a cell wall. O 4) Have large capsules. 5) the presence of mycolic acid in their cell walls.arrow_forwardEndospores : 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_forwardExplain the importance of the Gram positve structure:- They contain a thick peptidoglycan layer and cytoplasmic lipid membrane.- These bacteria lack an outer membrane.- Have a lower lipid content and more teichoic acids.- They move around with the help of locomotion organs such as cilia and flagella.arrow_forward
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