Pathogens are divided into five classes: bacteria, fungi , parasites , viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

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Answer 1

Question

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

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Students have asked these similar questions

19. On the diagram below a. Label the three pictures as: DNA; polypeptide; or RNA. b. Label the arrows as: translation or transcription/RNA processing. c. Add the following details to the diagram. Promoter region TATA box Transcription start site Transcription terminator Intron (A,B,C,D) Exons (1,2,3,4,5) Splice sites 5' cap 5' UTR (untranslated region) 3' poly A tail 3' UTR (untranslated region) Translational start (AUG) Translational stop (UGA, UAG, or UAA) N and C ends of polypeptide 0000

Match the letter labels in the figure below to the terms. Some letter labels are not used. MNNNNNNIN M C B A M D F E H K G 8

The diagram below illustrates a quorum sensing pathway from Staphylococcus aureus. Please answer the following questions. 1. Autoinduction is part of the quorum sensing system. Which promoter (P2 or P3) is critical for autoinduction? 2)This staphylococcus aureus grows on human wounds, causing severe infections. You would like to start a clinical trial to treat these wound infections. Please describe: a) What molecule do you recommend for the trial. Why? b) Your trial requires that Staphylococcus aureus be isolated from the wound and submitted to genome sequencing before admittance. Why? What are you testing for? 3) If a mutation arises where the Promoter P3 is constitutively active, how would that influence sensitivity to AIP? Please explain your rationale. 4) This pathway is sensitive to bacterial cell density. Describe two separate mutation that would render the pathway active independent of cell density. Briefly explain your rationale. Mutation 1 Mutation 2

Answer 2

Question

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

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Answer 3

Question

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

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Answer 4

Question

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

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Answer 5

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

Answer 6

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.

Conclusion

Bacteria are the unicellular organisms, made up of only one cell and having no defined organelles. Hence, the correct answer is option (b) Bacteria.

Answer 7

Chapter 23, Problem 1E

Summary Introduction

Introduction:

Pathogens are divided into five classes: bacteria, fungi, parasites, viruses and protozoa. Pathogens are the disease causing organisms and may invade human body through different pathways. Some are unicellular and some are multicellular based on complexity of their structure. Unicellular organisms are single celled organisms unlike multicellular organisms which have more than one cell. Unicellular are often called as prokaryotes.

Answer 8

Expert Solution & Answer

Answer to Problem 1E

Solution:

The correct answer is option (b) bacteria.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Explanation/justification for the correct answer:

Option (b) Bacteria. Bacteria are microscopically single celled organism with very simple cell structure. They are the unicellular prokaryotes which lack neatly packed DNA within a nucleus unlike prokaryotes; instead the DNA material is free floating. They also membrane bound organelles.

Explanation for incorrect answer:

Option (a) Virus. The viruses are composed of DNA/RNA fragments encapsulated within protein material. It has no organelles like any other cells and also lacks the capability of dividing.

Option (c) Fungi. The fungi are a member of eukaryotic group which are multicellular organisms. They have chitin in their cell wall that makes them different from other classes like plant or animal.

Option (d) Parasite. Parasites are the organisms that live in another organism called its host. They use host’s resources to live, generally by causing harm to its host. They may be microorganisms or may reach over 30 meters in length.

Option (e) None of these. Bacteria are the unicellular organisms among above options, hence this cannot be a correct option.