Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 22, Problem 22RQ
Which of the statements about biofilms is incorrect?
- Biofilms are considered responsible for diseases such as cystic fibrosis
- Biofilms produce dental plaque, and colonize catheters and prostheses
- Biofilms colonize open wounds and burned tissue
- All statements are incorrect.
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Which is NOT true of attachment or adherance?
may be due to fimbriae
Omay be due to capsules (glycocalyx)
may be due to biofilms
only normal microbiota can attach
necessary in order to invade and cause disease
BIO 211 - Chapter 4 Study Tables
Domain(s)
Presence of a nucleus
Location of DNA
Number of organelles
Cell wall material
Type of cell division
"S" type of ribosomes
Predominant body locations
Size of cell wall
Unique cellular structures
Name
PROKARYOTES VS. EUKARYOTES
Prokaryote
GRAM-POSITIVE VS. GRAM-NEGATIVE BACTERIA
Gram-positive
Eukaryote
Gram-negative
C
ZOOM
+
Within a biofilm:
cells are randomly distributed.
cells are protected from easy penetration of larger molecules including disinfectants and antibiotics.
dry conditions lead to stasis.
oxygen is limiting.
Chapter 22 Solutions
Biology 2e
Ch. 22 - Figure 22.8 Compared to free-floating bacteria,...Ch. 22 - Figure 22.16 Which of the following statements is...Ch. 22 - Figure 22.19 Which of the following statements...Ch. 22 - The first forms of life on Earth were thought to...Ch. 22 - Microbial mats. are the earliest forms of life on...Ch. 22 - The first organisms that oxygenated the atmosphere...Ch. 22 - Halophiles are organisms that require a salt...Ch. 22 - Many of the first prokaryotes to be cultured in a...Ch. 22 - The presence of a membrane-enclosed nucleus is a...Ch. 22 - Which of the following consist of prokaryotic...
Ch. 22 - The cell wall is ___________ . interior to the...Ch. 22 - Organisms most likely to be found in extreme...Ch. 22 - Prokaryotes stain as Gram-positive or Gramnegative...Ch. 22 - Pseudopeptidoglycan is a characteristic of the...Ch. 22 - The lipopolysaccharide layer (LPS) is a...Ch. 22 - Which of the following elements is not a...Ch. 22 - Prokaryotes that obtain their energy from chemical...Ch. 22 - Ammonification is the process by which. ammonia is...Ch. 22 - Plants use carbon dioxide from the air and are...Ch. 22 - Cyanobacteria harness energy from the sun through...Ch. 22 - A disease that is constantly present in a...Ch. 22 - Which of the statements about biofilms is...Ch. 22 - Which of these statements is true? An antibiotic...Ch. 22 - A person in England arrives at a medical clinic...Ch. 22 - MRSA has emerged as a serious infectious disease,...Ch. 22 - Which of these occurs through symbiotic nitrogen...Ch. 22 - Synthetic compounds found in an organism but not...Ch. 22 - Bioremediation includes. the use of prokaryotes...Ch. 22 - In addition to providing yogurt with its unique...Ch. 22 - Describe briefly how you would detect the presence...Ch. 22 - Why do scientists believe that the first organisms...Ch. 22 - A new bacterial species is discovered and...Ch. 22 - Mention three differences between bacteria and...Ch. 22 - Explain the statement that both types, bacteria...Ch. 22 - A scientist isolates a new species of prokaryote...Ch. 22 - Think about the conditions (temperature, light,...Ch. 22 - Farmers continually rotate the crops grown in...Ch. 22 - Imagine a region of soil became contaminated,...Ch. 22 - Explain the reason why the imprudent and excessive...Ch. 22 - Researchers have discovered that washing spinach...Ch. 22 - Your friend believes that prokaryotes are always...Ch. 22 - Many people use antimicrobial soap to kill...
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- Different types of bacteria are found inbiofilm. Bacteria with oxygen respiration are found at the surface, further down there are anaerobic bacteria. Why is it that you find other bacteria that doesnt need oxygenarrow_forwardMicrobe that causes Disease Environment in which the microbe thrives How to break the environmental chain and control the spread of the disease Salmonella - bacterium that causes salmonellosis Intestines of people and animals- lives in raw eggs poultry,and meat Borrelia burgdorferi-bacterium that causes Lyme disease Lives in deer ticks Group A Streptococcus- bacterium that causes '' strep'' infections Lives in the mucus from the nose or throat of an infected person Giardia- protozoan that causes giardiasis Lives in feces of infected people and animals. Spread by contact with contaminnated water. Rabies virus Lives in the saliva of infected animals.Spread when an infected animal bites another animal or person. Here is table of Disease Causing Microbes . What ways you can think to control the spread the disease ?arrow_forwardBiofilms are often formed on artificial surfaces in the human body. During medical procedures, when artificial joints, intravenous catheters, urinary catheters are placed and injections are made, commensals/mutualists may be introduced into new sites in the body and there they may form biofilms. Which statement below is NOT a reason to explain why such bacteria living in biofilms are so difficult to eliminate? O layers of biofilm prevent phagocytes from killing bacteria O layers of biofilm acts a a diffusion barrier against antibiotics O biofilm stimulates bacteria to grow continually in the log/exponential phase of growth O layers of biofilm acts a a diffusion barrier against antibodies/immunoglobulins O bacteria often in stationary phase of growtharrow_forward
- Which of the following statement/s is/are true about gram positive bacteria Cell wall has thick peptidoglycan layer Cell wall lipid content is very low Lipopolyscharride layer is absent All of the abovearrow_forwardWhich of the following statement/s is/are true about gram negative bacteria Cell wall has thin peptidoglycan layer Cell wall lipid content is very low Lipopolyscharride layer is present All of the abovearrow_forwardAntibiotics often target which components of microbial cells? Choose all that apply. Group of answer choices Cell walls Formation of a nucleus after mitosis Flagella Transcription of genes to mRNAarrow_forward
- Which of the following would be most likely to help a microbe survive human stomach acid to cause an infection in the intestines? O Peptidoglycan cell walls Endospores Capsules Piliarrow_forwardLipopolysaccharide (LPS) is a major feature of which cell wall? Fungal O Viral O Gram-positive bacteria Gram-negative bacteria All of the optionsarrow_forwardWhich of the following is correct? All bacteria can form endospores Vegetative cells are inactive cell Endospores are a dormant stage of a cell Endospores stain pinkarrow_forward
- What is a biofilm? Give an example of a biofilm that is beneficial to humans and one that is harmful.arrow_forwardWhich of the following is the most important structure related to microbial attachment to cells? Flagellum Plasmid Peptidoglycan Glycocalixarrow_forwardWhich of the following statement(s) correctly apply to biofilms? (Select all that apply) O Biofilms in pipes can block the flow of water. O Biofilms in your body protect mucous membranes from harmful microbes. O Biofilms on rocks provide food for animal life. O Biofilms on medical devices cause infections. O Compared to free-living bacteria, biofilms are more sensitive to antibiotics.arrow_forward
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