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Assertion: Janus green B is a vital sta...

Assertion: Janus green B is a vital stain for locating mitochondria.
Reason :Janus green is oxidized by cytochrome `a_(2)` present in mitochondria.

A

if both Assertion & Reason are true and the reason in the correct explanation of the assertion, then mark(1).

B

if both Assertion & Reason are true and the reason in the correct explanation of the assertion, then mark(2).

C

if Assertion is the ture statement but Reason is false, then mark(3)

D

if both Assertion and Reaosn are false statements, then mark(4)

Text Solution

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The correct Answer is:
To solve the question regarding the assertion and reason about Janus green B and its role in locating mitochondria, follow these steps: ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that "Janus green B is a vital stain for locating mitochondria." - Janus green B is indeed a vital stain used in biological studies to visualize mitochondria in cells. It is known for its ability to indicate the presence of mitochondria based on the metabolic activity of the cells. **Hint**: Recall what a vital stain is and its purpose in cellular biology. 2. **Understanding the Reason**: - The reason given is that "Janus green is oxidized by cytochrome a2 present in mitochondria." - This statement is also true. Cytochrome a2 is part of the electron transport chain in mitochondria, which plays a crucial role in cellular respiration. Janus green B can be oxidized by cytochrome a2, leading to a color change that indicates the presence of mitochondria. **Hint**: Consider the role of cytochromes in cellular respiration and how they interact with various compounds. 3. **Evaluating the Truth of Both Statements**: - Both the assertion and the reason are true. Janus green B is indeed a vital stain for mitochondria, and it is oxidized by cytochrome a2 in the mitochondria. **Hint**: Think about the relationship between the assertion and reason. Are they both correct? 4. **Determining the Relationship**: - The reason provided explains why the assertion is true. The oxidation of Janus green B by cytochrome a2 is the mechanism that allows it to serve as a vital stain for mitochondria. **Hint**: Assess whether the reason directly supports the assertion. 5. **Conclusion**: - Since both the assertion and reason are true, and the reason is a correct explanation for the assertion, the correct answer is that both statements are true, and the reason is the correct explanation for the assertion. **Hint**: Look for answer choices that reflect this conclusion. ### Final Answer: Both the assertion and reason are true, and the reason is the correct explanation for the assertion.
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