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Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.
Assertion: R-type of Pneumococcus is non-virulent.
Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.
- a)Both assertion and reason are true and reason is the correct explanation of assertion.
- b)Both assertion and reason are true but reason is not the correct explanation of assertion.
- c)Assertion is true but reason is false.
- d)Both assertion and reason are false.
Correct answer is option 'B'. Can you explain this answer?
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Directions: Two statements are given-one labelled Assertion and the o...
Transformation is the change in the genetic constitution of an organism by picking up genes present in the environment. Pneumococcus has two strains -virulent (S) and non-virulent (R). The virulent strain causes pneumonia. fl-type bacteria form irregular or rough colonies and do not produce any disease while the 5-type bacteria cause pneumonia and then death in the mice. Griffith injected a combination of live £-type and heat killed 5-type bacteria into mice. While some mice survived, others developed the disease of pneumonia and died. Autopsy of the dead mice showed that they possessed both the types of bacteria in living state though the mice had been injected with dead virulent and living non-virulent bacteria. The occurrence of living 5-type virulent bacteria is possible only by their formation from R-type non-virulent bacteria which pick up the trait of virulence from dead bacteria. The phenomenon is called transformation.
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Directions: Two statements are given-one labelled Assertion and the o...
Assertion-Reason Type Question on Pneumococcus:
Assertion: R-type of Pneumococcus is non-virulent.
Reason: R-type of Pneumococcus can be virulent by having transformation with S-type of Pneumococcus.
Solution:
The assertion is true because R-type of Pneumococcus is non-virulent, meaning it does not have a capsule to protect against phagocytosis by the host immune system. On the other hand, the S-type of Pneumococcus is virulent because it has a capsule, which allows it to evade the host immune system.
The reason is also true, but it is not the correct explanation of the assertion. Transformation is the process by which bacterial cells take up DNA from the environment and incorporate it into their genome. This means that an R-type of Pneumococcus can become virulent if it acquires the genes for capsule production from an S-type of Pneumococcus through transformation. However, this does not change the fact that the original R-type of Pneumococcus is non-virulent.
Therefore, the correct answer is (b) Both assertion and reason are true, but reason is not the correct explanation of assertion.
Conclusion:
- R-type of Pneumococcus is non-virulent.
- S-type of Pneumococcus is virulent because it has a capsule.
- Transformation can make an R-type of Pneumococcus virulent by acquiring the genes for capsule production from an S-type of Pneumococcus.
- The reason given is true, but it does not explain why the assertion is true.
Assertion: R-type of Pneumococcus is non-virulent.
Reason: R-type of Pneumococcus can be virulent by having transformation with S-type of Pneumococcus.
Solution:
The assertion is true because R-type of Pneumococcus is non-virulent, meaning it does not have a capsule to protect against phagocytosis by the host immune system. On the other hand, the S-type of Pneumococcus is virulent because it has a capsule, which allows it to evade the host immune system.
The reason is also true, but it is not the correct explanation of the assertion. Transformation is the process by which bacterial cells take up DNA from the environment and incorporate it into their genome. This means that an R-type of Pneumococcus can become virulent if it acquires the genes for capsule production from an S-type of Pneumococcus through transformation. However, this does not change the fact that the original R-type of Pneumococcus is non-virulent.
Therefore, the correct answer is (b) Both assertion and reason are true, but reason is not the correct explanation of assertion.
Conclusion:
- R-type of Pneumococcus is non-virulent.
- S-type of Pneumococcus is virulent because it has a capsule.
- Transformation can make an R-type of Pneumococcus virulent by acquiring the genes for capsule production from an S-type of Pneumococcus.
- The reason given is true, but it does not explain why the assertion is true.
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Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer?.
Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer?.
Solutions for Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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Here you can find the meaning of Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Directions: Two statements are given-one labelled Assertion and the other labelled Reason. Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below.Assertion: R-type of Pneumococcus is non-virulent.Reason : R-type of Pneumococcus can be virulent by having transformation with S - type of Pneumococcus.a)Both assertion and reason are true and reason is the correct explanation of assertion.b)Both assertion and reason are true but reason is not the correct explanation of assertion.c)Assertion is true but reason is false.d)Both assertion and reason are false.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice NEET tests.
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