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Assertion : Phytochrome exists in two form P_{r} and P_{fr}

Question

Assertion : Phytochrome exists in two form $P_{r}$ and $P_{f r}$

Reason : $P_{r}$ form stimulates and $P_{f r}$ form inhibit flowering.

If both the assertion and reason are true and the reason is a correct explanation of the assertion

If both the assertion and reason are true but the reason is not a correct explanation of the assertion

If the assertion is true but the reaon is false

If both the assertion and reason are false

If the assertion is false but reason is true

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Sofia Discussed

Assertion : Phytochrome exists in two form

P_{r}

and

P_{f r}

Reason :

P_{r}

form stimulates and

P_{f r}

form inhibit flowering.

13 mins ago

Discuss this question LIVE

13 mins ago

Text solutionVerified

Light energy become effective when it is absorbed by a pigment. These pigments are called phytochromes. It occurs in two forms namely

P_{r}

and

P_{f r}

. The two forms are interconvertible. The

P_{r}

form absorbs red light of 660 nm and changes to

P_{f r}

. The

P_{f r}

form absorb far red light of 730 nm and changed to

P_{r}

. The

P_{f r}

form stimulates whereas

P_{r}

form inhibit flowering.

P_{f r}

form of phytochrome is the active form. The

P_{r}

form is not considered to be active. So, the correct answer is c'If the assertion is true but the reason is false'

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Question Text	Assertion : Phytochrome exists in two form $P_{r}$ and $P_{f r}$ Reason : $P_{r}$ form stimulates and $P_{f r}$ form inhibit flowering.
Answer Type	Text solution:1
Upvotes	150

Assertion : Phytochrome exists in two form Pr​ and Pfr​ Reason : Pr​ form stimulates and Pfr​ form inhibit flowering.

Text solutionVerified

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Assertion : Phytochrome exists in two form $P_{r}$ and $P_{f r}$

Reason : $P_{r}$ form stimulates and $P_{f r}$ form inhibit flowering.