NEET Exam  >  NEET Questions  >  Assertion (A): Red fibres in muscles have a h... Start Learning for Free
Assertion (A): Red fibres in muscles have a high content of myoglobin, which contributes to their reddish appearance.
Reason (R): These fibres primarily rely on anaerobic metabolism for energy production.
  • a)
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion
  • b)
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
  • c)
    If Assertion is true but Reason is false
  • d)
    If both Assertion and Reason are false
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Assertion (A): Red fibres in muscles have a high content of myoglobin,...
Understanding the Assertion and Reason
The question revolves around the characteristics of muscle fibres, specifically red fibres, and their energy metabolism.
Assertion (A) Explained
- Red fibres, or slow-twitch fibres, are indeed rich in myoglobin, a protein that binds oxygen.
- This myoglobin content gives these fibres their reddish appearance, as it contains heme, which is responsible for the red color.
Reason (R) Explained
- The statement that red fibres primarily rely on anaerobic metabolism is incorrect.
- In reality, red fibres are adapted for aerobic metabolism, utilizing oxygen to generate energy efficiently over prolonged periods.
Conclusion
- Since Assertion (A) is true, but Reason (R) is false, the correct answer is option 'C'.
- The reason does not provide a correct explanation for the assertion, as red fibres do not primarily rely on anaerobic metabolism; they are more suited for endurance activities that require sustained energy through aerobic processes.
Key Takeaways
- Red fibres = High myoglobin content = Reddish appearance.
- Red fibres predominantly utilize aerobic metabolism, not anaerobic.
- The disconnection between the assertion and the reason confirms that option 'C' is indeed correct.
Free Test
Community Answer
Assertion (A): Red fibres in muscles have a high content of myoglobin,...
 
- The Assertion is true because red fibres do indeed have a high content of myoglobin, which gives them a reddish appearance.
- The Reason is false because red fibres primarily rely on aerobic metabolism due to their high myoglobin and mitochondrial content, not anaerobic metabolism.
- Since the Assertion is true and the Reason is false, Option B is correct as both statements are true, but the Reason does not correctly explain the Assertion.
Line in NCERT: Muscle contains a red coloured oxygen storing pigment called myoglobin. Myoglobin content is high in some of the muscles which gives a reddish appearance. Such muscles are called the Red fibres. These muscles also contain plenty of mitochondria which can utilise the large amount of oxygen stored in them for ATP production. These muscles, therefore, can also be called aerobic muscles
 
Explore Courses for NEET exam

Top Courses for NEET

Question Description
Assertion (A): Red fibres in muscles have a high content of myoglobin, which contributes to their reddish appearance.Reason (R): These fibres primarily rely on anaerobic metabolism for energy production.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. 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 Assertion (A): Red fibres in muscles have a high content of myoglobin, which contributes to their reddish appearance.Reason (R): These fibres primarily rely on anaerobic metabolism for energy production.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): Red fibres in muscles have a high content of myoglobin, which contributes to their reddish appearance.Reason (R): These fibres primarily rely on anaerobic metabolism for energy production.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer?.
Solutions for Assertion (A): Red fibres in muscles have a high content of myoglobin, which contributes to their reddish appearance.Reason (R): These fibres primarily rely on anaerobic metabolism for energy production.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of Assertion (A): Red fibres in muscles have a high content of myoglobin, which contributes to their reddish appearance.Reason (R): These fibres primarily rely on anaerobic metabolism for energy production.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Assertion (A): Red fibres in muscles have a high content of myoglobin, which contributes to their reddish appearance.Reason (R): These fibres primarily rely on anaerobic metabolism for energy production.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Assertion (A): Red fibres in muscles have a high content of myoglobin, which contributes to their reddish appearance.Reason (R): These fibres primarily rely on anaerobic metabolism for energy production.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Assertion (A): Red fibres in muscles have a high content of myoglobin, which contributes to their reddish appearance.Reason (R): These fibres primarily rely on anaerobic metabolism for energy production.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Assertion (A): Red fibres in muscles have a high content of myoglobin, which contributes to their reddish appearance.Reason (R): These fibres primarily rely on anaerobic metabolism for energy production.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertionb)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is falsed)If both Assertion and Reason are falseCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev