Bacterial cells can be classified as gram-positive or gram-negative, depending upon the ability to retain the stain. The gram-positive bacteria have a thick layer of peptidoglycan, while the gram-negative bacteria have a thin layer of peptidoglycan cell-wall. The crosslinking of a peptidoglycan in gram-positive bacteria helps it retain the crystal violet stain ( gram stain ). Gram-negative bacteria have a slime layer outside their plasma membrane that is also known as a capsule in certain cases. The human gut and excretory system are often colonized by a huge range of microbiota.

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Answer 1

Question

Chapter 26, Problem 1TYK

Summary Introduction

Introduction:

Bacterial cells can be classified as gram-positive or gram-negative, depending upon the ability to retain the stain. The gram-positive bacteria have a thick layer of peptidoglycan, while the gram-negative bacteria have a thin layer of peptidoglycan cell-wall. The crosslinking of a peptidoglycan in gram-positive bacteria helps it retain the crystal violet stain (gram stain). Gram-negative bacteria have a slime layer outside their plasma membrane that is also known as a capsule in certain cases. The human gut and excretory system are often colonized by a huge range of microbiota.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

Pili keep them attached to the urethral walls.

Explanation of Solution

Explanation/justification for the correct answer:

Option (d) is pili. Pili are the hair-like structures that arise from the cell walls of the bacteria. Pili are mostly present in gram-negative bacteria and help them adhere to a surface like other prokaryotic cells or tissue membranes like the urethral lining in humans. Hence, option (d) is the correct answer.

Explanation for incorrect answer:

Option (a) is sex pili. The sex pili are extended for conjugation, in which the one bacterium exchanges genetic material with another, under adverse conditions. Sex pili do not help in adherence to the host tissues. So, it is an incorrect option.

Option (b) is flagella. Flagella are hair-like extensions that help in the locomotion of a microbe. The flagella move with the help of motor proteins, allowing the bacteria to move from one location to another. So, it is an incorrect option.

Option (c) is capsule. The capsule is a diffused glycocalyx present in the gram-negative bacteria. It protects the bacteria from antibiotic effects. The peptidoglycan of cell-wall protects the bacteria from adverse environments. So, it is an incorrect option.

Conclusion

Therefore, it can be concluded that the bacterial cells that are present in the urethra are gram-negative as their surface is covered with pili that help them adhere to the urethral walls.

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Students have asked these similar questions

I am doing my microbiology homework and I need help with these questions: 1) List the structures ALL bacteria possess. 2) Identify three structures SOME but not all bacteria possess. 5) Describe the structure and function of three different structures found outside of the bacterial cytoplasmic membrane. 6) Differentiate between the two main types of bacterial envelope structures. 7) Why are Gram-positive cell walls stronger than Gram-negative cell walls? 8) Name a substance in the envelope of SOME bacteria that can cause severe symptoms in humans. 9) Describe the causes of sporogenesis and germination 10) Compare and contrast the major features of archaea, bacteria and eukaryotes by completing the table below. Characteristic Bacteria Archaea Eukarya Chromosome Type of Ribosomes Protein Synthesis Similar to Eukarya Sterols In Membrane Membrane-bound Organelles Peptidoglycan in Cell wall

Mycoplasmas are pleomorphic bacteria. How do the unique structural characteristics of mycoplasmas relate to their bacterial morphology? Mycoplasmas have a low G + C genome content. Mycoplasmas appear Gram negative when a Gram stain is performed. Mycoplasmas lack a cell wall. Mycoplasmas form colonies with a fried-egg appearance.

Describe bacterial sporulation in your own words.

Answer 2

Question

Chapter 26, Problem 1TYK

Summary Introduction

Introduction:

Bacterial cells can be classified as gram-positive or gram-negative, depending upon the ability to retain the stain. The gram-positive bacteria have a thick layer of peptidoglycan, while the gram-negative bacteria have a thin layer of peptidoglycan cell-wall. The crosslinking of a peptidoglycan in gram-positive bacteria helps it retain the crystal violet stain (gram stain). Gram-negative bacteria have a slime layer outside their plasma membrane that is also known as a capsule in certain cases. The human gut and excretory system are often colonized by a huge range of microbiota.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

Pili keep them attached to the urethral walls.

Explanation of Solution

Explanation/justification for the correct answer:

Option (d) is pili. Pili are the hair-like structures that arise from the cell walls of the bacteria. Pili are mostly present in gram-negative bacteria and help them adhere to a surface like other prokaryotic cells or tissue membranes like the urethral lining in humans. Hence, option (d) is the correct answer.

Explanation for incorrect answer:

Option (a) is sex pili. The sex pili are extended for conjugation, in which the one bacterium exchanges genetic material with another, under adverse conditions. Sex pili do not help in adherence to the host tissues. So, it is an incorrect option.

Option (b) is flagella. Flagella are hair-like extensions that help in the locomotion of a microbe. The flagella move with the help of motor proteins, allowing the bacteria to move from one location to another. So, it is an incorrect option.

Option (c) is capsule. The capsule is a diffused glycocalyx present in the gram-negative bacteria. It protects the bacteria from antibiotic effects. The peptidoglycan of cell-wall protects the bacteria from adverse environments. So, it is an incorrect option.

Conclusion

Therefore, it can be concluded that the bacterial cells that are present in the urethra are gram-negative as their surface is covered with pili that help them adhere to the urethral walls.

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Answer 3

Question

Chapter 26, Problem 1TYK

Summary Introduction

Introduction:

Bacterial cells can be classified as gram-positive or gram-negative, depending upon the ability to retain the stain. The gram-positive bacteria have a thick layer of peptidoglycan, while the gram-negative bacteria have a thin layer of peptidoglycan cell-wall. The crosslinking of a peptidoglycan in gram-positive bacteria helps it retain the crystal violet stain (gram stain). Gram-negative bacteria have a slime layer outside their plasma membrane that is also known as a capsule in certain cases. The human gut and excretory system are often colonized by a huge range of microbiota.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

Pili keep them attached to the urethral walls.

Explanation of Solution

Explanation/justification for the correct answer:

Option (d) is pili. Pili are the hair-like structures that arise from the cell walls of the bacteria. Pili are mostly present in gram-negative bacteria and help them adhere to a surface like other prokaryotic cells or tissue membranes like the urethral lining in humans. Hence, option (d) is the correct answer.

Explanation for incorrect answer:

Option (a) is sex pili. The sex pili are extended for conjugation, in which the one bacterium exchanges genetic material with another, under adverse conditions. Sex pili do not help in adherence to the host tissues. So, it is an incorrect option.

Option (b) is flagella. Flagella are hair-like extensions that help in the locomotion of a microbe. The flagella move with the help of motor proteins, allowing the bacteria to move from one location to another. So, it is an incorrect option.

Option (c) is capsule. The capsule is a diffused glycocalyx present in the gram-negative bacteria. It protects the bacteria from antibiotic effects. The peptidoglycan of cell-wall protects the bacteria from adverse environments. So, it is an incorrect option.

Conclusion

Therefore, it can be concluded that the bacterial cells that are present in the urethra are gram-negative as their surface is covered with pili that help them adhere to the urethral walls.

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Answer 4

Question

Chapter 26, Problem 1TYK

Summary Introduction

Introduction:

Bacterial cells can be classified as gram-positive or gram-negative, depending upon the ability to retain the stain. The gram-positive bacteria have a thick layer of peptidoglycan, while the gram-negative bacteria have a thin layer of peptidoglycan cell-wall. The crosslinking of a peptidoglycan in gram-positive bacteria helps it retain the crystal violet stain (gram stain). Gram-negative bacteria have a slime layer outside their plasma membrane that is also known as a capsule in certain cases. The human gut and excretory system are often colonized by a huge range of microbiota.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

Pili keep them attached to the urethral walls.

Explanation of Solution

Explanation/justification for the correct answer:

Option (d) is pili. Pili are the hair-like structures that arise from the cell walls of the bacteria. Pili are mostly present in gram-negative bacteria and help them adhere to a surface like other prokaryotic cells or tissue membranes like the urethral lining in humans. Hence, option (d) is the correct answer.

Explanation for incorrect answer:

Option (a) is sex pili. The sex pili are extended for conjugation, in which the one bacterium exchanges genetic material with another, under adverse conditions. Sex pili do not help in adherence to the host tissues. So, it is an incorrect option.

Option (b) is flagella. Flagella are hair-like extensions that help in the locomotion of a microbe. The flagella move with the help of motor proteins, allowing the bacteria to move from one location to another. So, it is an incorrect option.

Option (c) is capsule. The capsule is a diffused glycocalyx present in the gram-negative bacteria. It protects the bacteria from antibiotic effects. The peptidoglycan of cell-wall protects the bacteria from adverse environments. So, it is an incorrect option.

Conclusion

Therefore, it can be concluded that the bacterial cells that are present in the urethra are gram-negative as their surface is covered with pili that help them adhere to the urethral walls.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Chapter 26, Problem 1TYK

Summary Introduction

Introduction:

Bacterial cells can be classified as gram-positive or gram-negative, depending upon the ability to retain the stain. The gram-positive bacteria have a thick layer of peptidoglycan, while the gram-negative bacteria have a thin layer of peptidoglycan cell-wall. The crosslinking of a peptidoglycan in gram-positive bacteria helps it retain the crystal violet stain (gram stain). Gram-negative bacteria have a slime layer outside their plasma membrane that is also known as a capsule in certain cases. The human gut and excretory system are often colonized by a huge range of microbiota.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

Pili keep them attached to the urethral walls.

Explanation of Solution

Explanation/justification for the correct answer:

Option (d) is pili. Pili are the hair-like structures that arise from the cell walls of the bacteria. Pili are mostly present in gram-negative bacteria and help them adhere to a surface like other prokaryotic cells or tissue membranes like the urethral lining in humans. Hence, option (d) is the correct answer.

Explanation for incorrect answer:

Option (a) is sex pili. The sex pili are extended for conjugation, in which the one bacterium exchanges genetic material with another, under adverse conditions. Sex pili do not help in adherence to the host tissues. So, it is an incorrect option.

Option (b) is flagella. Flagella are hair-like extensions that help in the locomotion of a microbe. The flagella move with the help of motor proteins, allowing the bacteria to move from one location to another. So, it is an incorrect option.

Option (c) is capsule. The capsule is a diffused glycocalyx present in the gram-negative bacteria. It protects the bacteria from antibiotic effects. The peptidoglycan of cell-wall protects the bacteria from adverse environments. So, it is an incorrect option.

Conclusion

Therefore, it can be concluded that the bacterial cells that are present in the urethra are gram-negative as their surface is covered with pili that help them adhere to the urethral walls.

Answer 6

Chapter 26, Problem 1TYK

Summary Introduction

Introduction:

Bacterial cells can be classified as gram-positive or gram-negative, depending upon the ability to retain the stain. The gram-positive bacteria have a thick layer of peptidoglycan, while the gram-negative bacteria have a thin layer of peptidoglycan cell-wall. The crosslinking of a peptidoglycan in gram-positive bacteria helps it retain the crystal violet stain (gram stain). Gram-negative bacteria have a slime layer outside their plasma membrane that is also known as a capsule in certain cases. The human gut and excretory system are often colonized by a huge range of microbiota.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

Pili keep them attached to the urethral walls.

Explanation of Solution

Explanation/justification for the correct answer:

Option (d) is pili. Pili are the hair-like structures that arise from the cell walls of the bacteria. Pili are mostly present in gram-negative bacteria and help them adhere to a surface like other prokaryotic cells or tissue membranes like the urethral lining in humans. Hence, option (d) is the correct answer.

Explanation for incorrect answer:

Option (a) is sex pili. The sex pili are extended for conjugation, in which the one bacterium exchanges genetic material with another, under adverse conditions. Sex pili do not help in adherence to the host tissues. So, it is an incorrect option.

Option (b) is flagella. Flagella are hair-like extensions that help in the locomotion of a microbe. The flagella move with the help of motor proteins, allowing the bacteria to move from one location to another. So, it is an incorrect option.

Option (c) is capsule. The capsule is a diffused glycocalyx present in the gram-negative bacteria. It protects the bacteria from antibiotic effects. The peptidoglycan of cell-wall protects the bacteria from adverse environments. So, it is an incorrect option.

Conclusion

Therefore, it can be concluded that the bacterial cells that are present in the urethra are gram-negative as their surface is covered with pili that help them adhere to the urethral walls.

Answer 7

Chapter 26, Problem 1TYK

Summary Introduction

Introduction:

Bacterial cells can be classified as gram-positive or gram-negative, depending upon the ability to retain the stain. The gram-positive bacteria have a thick layer of peptidoglycan, while the gram-negative bacteria have a thin layer of peptidoglycan cell-wall. The crosslinking of a peptidoglycan in gram-positive bacteria helps it retain the crystal violet stain (gram stain). Gram-negative bacteria have a slime layer outside their plasma membrane that is also known as a capsule in certain cases. The human gut and excretory system are often colonized by a huge range of microbiota.

Answer 8

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

Pili keep them attached to the urethral walls.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Explanation/justification for the correct answer:

Option (d) is pili. Pili are the hair-like structures that arise from the cell walls of the bacteria. Pili are mostly present in gram-negative bacteria and help them adhere to a surface like other prokaryotic cells or tissue membranes like the urethral lining in humans. Hence, option (d) is the correct answer.

Explanation for incorrect answer:

Option (a) is sex pili. The sex pili are extended for conjugation, in which the one bacterium exchanges genetic material with another, under adverse conditions. Sex pili do not help in adherence to the host tissues. So, it is an incorrect option.

Option (b) is flagella. Flagella are hair-like extensions that help in the locomotion of a microbe. The flagella move with the help of motor proteins, allowing the bacteria to move from one location to another. So, it is an incorrect option.

Option (c) is capsule. The capsule is a diffused glycocalyx present in the gram-negative bacteria. It protects the bacteria from antibiotic effects. The peptidoglycan of cell-wall protects the bacteria from adverse environments. So, it is an incorrect option.

Answer 12

Conclusion

Therefore, it can be concluded that the bacterial cells that are present in the urethra are gram-negative as their surface is covered with pili that help them adhere to the urethral walls.

Answer 13

Ch. 26.1 - Prob. 1SB Ch. 26.1 - Prob. 2SB Ch. 26.1 - Prob. 3SB Ch. 26.1 - Prob. 4SB Ch. 26.2 - What is a biofilm? Give an example of a biofilm...Ch. 26.2 - Prob. 2SB Ch. 26.2 - Prob. 3SB Ch. 26.3 - Prob. 1SB Ch. 26.3 - Prob. 2SB Ch. 26.3 - Prob. 3SB

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