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#light absorption

4 public questions tagged with this topic.

Phytochrome apoprotein alone cannot absorb light because:

B fits best: It lacks chromophore. Keep the PHYTOCHROME basics straight and It lacks chromophore stands out as the precise answer. Avoid: A) It lacks PAS domain; C) It is monomeric; D) It is unstable. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

The Pfr form of phytochrome absorbs light maximally at:

C fits best: 730 nm. Keep the PHOTOPERIODISM basics straight and 730 nm stands out as the precise answer. Avoid: A) 660 nm; B) 680 nm; D) 480 nm. Light and flowering items often hinge on which photoreceptor or day-length rule is in play.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

The Pr form of phytochrome absorbs light maximally at:

That points to B: 660 nm. Compared with the other options, 660 nm is the one that correctly describes the PHOTOPERIODISM concept. The wrong ones are A) 730 nm; C) 450 nm; D) 550 nm. If you’re stuck, eliminate anything that contradicts a basic fact you already know for this topic.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.