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Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion: In most of the mammals RBCs are devoid of nucleus.
Reason: Red colour is filled in the entire cytoplasm of RBC, iron containing complex protein called haemoglobin.
- 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 'B'. Can you explain this answer?
Verified Answer
Directions: In the following questions, a statement of assertion is fo...
Mature mammalian RBC lack cell organelles including nucleus, mitochondria, ribosomes, centrioles and endoplasmic reticulum. It increases the surface area of RBCs and enables them to contain more haemoglobin. Thus, almost entire cytoplasm is filled with haemoglobin.
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Directions: In the following questions, a statement of assertion is fo...
Understanding the Assertion and Reason
The assertion states that in most mammals, red blood cells (RBCs) are devoid of a nucleus. This is a true statement as mammalian RBCs lose their nucleus during maturation to maximize space for hemoglobin, the oxygen-carrying protein.
Role of Hemoglobin in RBCs
The reason provided explains that the red color in the cytoplasm of RBCs is due to hemoglobin, an iron-containing complex protein. This is also true, as hemoglobin gives RBCs their characteristic red color and is essential for oxygen transport.
Explaining the Relationship
- While both the assertion and reason are true, the reason does not directly explain why mammalian RBCs lack a nucleus.
- The absence of a nucleus in RBCs is primarily an evolutionary adaptation to increase the cell's capacity to carry oxygen, not solely because of the presence of hemoglobin.
Conclusion
Thus, the correct choice is option 'B': both the assertion and reason are true, but the reason is not the correct explanation of the assertion. The statement about hemoglobin being responsible for the lack of a nucleus oversimplifies the physiological adaptations of RBCs in mammals.
The assertion states that in most mammals, red blood cells (RBCs) are devoid of a nucleus. This is a true statement as mammalian RBCs lose their nucleus during maturation to maximize space for hemoglobin, the oxygen-carrying protein.
Role of Hemoglobin in RBCs
The reason provided explains that the red color in the cytoplasm of RBCs is due to hemoglobin, an iron-containing complex protein. This is also true, as hemoglobin gives RBCs their characteristic red color and is essential for oxygen transport.
Explaining the Relationship
- While both the assertion and reason are true, the reason does not directly explain why mammalian RBCs lack a nucleus.
- The absence of a nucleus in RBCs is primarily an evolutionary adaptation to increase the cell's capacity to carry oxygen, not solely because of the presence of hemoglobin.
Conclusion
Thus, the correct choice is option 'B': both the assertion and reason are true, but the reason is not the correct explanation of the assertion. The statement about hemoglobin being responsible for the lack of a nucleus oversimplifies the physiological adaptations of RBCs in mammals.
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Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: In most of the mammals RBCs are devoid of nucleus.Reason: Red colour is filled in the entire cytoplasm of RBC, iron containing complex protein called haemoglobin.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 'B'. Can you explain this answer?
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Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: In most of the mammals RBCs are devoid of nucleus.Reason: Red colour is filled in the entire cytoplasm of RBC, iron containing complex protein called haemoglobin.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 '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: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: In most of the mammals RBCs are devoid of nucleus.Reason: Red colour is filled in the entire cytoplasm of RBC, iron containing complex protein called haemoglobin.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 '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: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: In most of the mammals RBCs are devoid of nucleus.Reason: Red colour is filled in the entire cytoplasm of RBC, iron containing complex protein called haemoglobin.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 'B'. Can you explain this answer?.
Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: In most of the mammals RBCs are devoid of nucleus.Reason: Red colour is filled in the entire cytoplasm of RBC, iron containing complex protein called haemoglobin.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 '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: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: In most of the mammals RBCs are devoid of nucleus.Reason: Red colour is filled in the entire cytoplasm of RBC, iron containing complex protein called haemoglobin.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 '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: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: In most of the mammals RBCs are devoid of nucleus.Reason: Red colour is filled in the entire cytoplasm of RBC, iron containing complex protein called haemoglobin.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 'B'. Can you explain this answer?.
Solutions for Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: In most of the mammals RBCs are devoid of nucleus.Reason: Red colour is filled in the entire cytoplasm of RBC, iron containing complex protein called haemoglobin.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 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for NEET.
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ample number of questions to practice Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:Assertion: In most of the mammals RBCs are devoid of nucleus.Reason: Red colour is filled in the entire cytoplasm of RBC, iron containing complex protein called haemoglobin.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 'B'. Can you explain this answer? tests, examples and also practice NEET tests.
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