Biology
5th Edition
ISBN: 9781260487947
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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Which of the following statements is a reason why Acid-Fast Bacteria resist the Gram stain
a) Because their cell wall architecture varies from both gram-negative and gram-positive bacteria.
b) Because they lack the peptidoglycan layer.
c) Because they have a thick peptidoglycan layer.
d) Because they have a thick layer of fatty acids.
Why are Pseudomonas aeruginosa infections difficult to treat?
A. Because they form biofilms, which are difficult for antibiotics to penetrate.
B. Because they have a special endotoxin that degrades many antibiotics.
C. Because we do not have any antibiotics that target P. aeruginosa.
D. Because they are gram-positive bacteria, which are harder to treat.
The structures that enable some Gram-positive bacteria to remaindormant for extremely long periods of time are known asa. akinetes. b. endospores. c. biofilms.
d. lipopolysaccharide envelopes.
e. pili.
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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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
- Which of the following is TRUE regarding Gram negative bacteria? a- Their cell wall is composed of a large proportion of sugars b- Their cell wall does not absorb the Gram stain and turns pink c- Their cell wall is composed of a small proportion of peptidoglycan d- Two of the above statements are truearrow_forwardGive an example of a type of clinically relevant bacteria that are spore formers. For example what are the spore formers that cause diseases in humans?arrow_forwardWhich of the following bacteria would have the above cell boundary structure? A. Mycobacterium B.Clostridium C. Mycoplasma D. Borreliaarrow_forward
- What hypothesis you can form as to why the vibro bacteria might survive better in colder temperatures?arrow_forwardWhich group of bacteria contains the gram-positive, anaerobic bacterium that causes botulism? (a) clostridia (b) actinomycetes (c) enterobacteria (d) spirochetes (e) streptococciarrow_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_forward
- Which of the following is present in both gram-positive and gramnegativecell walls?a. an outer membrane. c. teichoic acidb. peptidoglycan d.lipopolysaccharidesarrow_forwardWhich of the following is present in both gram-positive and gramnegativecell walls?a. an outer membrane c. teichoic acidb. peptidoglycan d. lipopolysaccharidesarrow_forwardThe broth culture of Bacillus subtilis showed growth even after extended heating in a waterbath, while Serratia marcescens did not. This is due to: a. Bacillus subtilis is Gram-positive, while Serratia marcescens is Gram-negative b. Bacillus subtilis is a spore former c. the pigment of Serratia marcescens absorbs more radiation than other cells d. Bacillus subtilis has enzymes that protect it from ozonearrow_forward
- Bacterial flagella (a) are homologous with eukaryotic flagella (b) exhibit a rotary motion (c) consist of a basal body and nine pairs of microtubules (d) are important in transduction (e) are characteristic of gram-positive bacteriaarrow_forwardSelect a statement that is not correct about bacterial fimbriae? A. they protect the cell from dehydration B. they are called attachment pili to distinguish them from the pili used to transfer DNA during conjugation C. they are used to attach the cell to its substrate or to other prokaryote D. they are hair-like projections that aid in attachment.arrow_forwardWhich of the following is not consistent with an endospore? a. It is not a means of asexual reproduction b. Considered as a virulence factor thereby increasing the bacteria's survival c. This structure makes the bacteria withstand harsh conditions in the environment d. It is presence increases bacterial susceptibility to disinfectants and radiationarrow_forward
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