Prepare for NEET Biology Photosynthesis in Higher Plants (Light Phase) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert help to study photochemical reactions, PSI, PSII, and ATP formation.
NEET Questions / Botany / Photosynthesis in Higher Plants / Light Phase
The absorption spectrum of chlorophyll a and b shows peaks in the blue and red regions. Which statement best explains the green color of leaves?
Green light is preferentially absorbed by chlorophyll.
Green light is converted to heat energy within the leaf.
Green light is primarily reflected and transmitted, not absorbed.
Chlorophyll does not interact with green light.
The reaction center in PS II has an absorption maxima at:
700 nm
680 nm
480 nm
550 nm
P680, the reaction center chlorophyll a in photosystem II, absorbs light maximally at which wavelength?
700 nm
680 nm
450 nm
500 nm
Which of the following wavelengths of light is most effectively absorbed by the reaction center of photosystem II?
400 nm
550 nm
680 nm
750 nm
During photosynthesis, the reaction center of photosystem II (PS II) absorbs light energy. What is the approximate wavelength of light that excites the P680 chlorophyll molecule in PS II?
680 nm
450 nm
550 nm
700 nm
In the light-dependent reactions of photosynthesis, which photosystem's reaction center has an absorption maximum closest to 680 nm?
Photosystem II
Photosystem I
Both Photosystem I and II
Neither Photosystem I nor II
The chlorophyll molecule in reaction centre of PS II has maximum absorption at
680 nm
700 nm
720 nm
460 nm
Absorption spectrum of chlorophyll-a and the action spectrum of photosynthesis is identical because chlorophyll-a
Absorbs the maximum light
Absorbs the minimum light
Absorbs the red and blue light
Is found most abundantly
What happen to the chloroplast pigment when they absorb light?
They become reduced
They become excited
They lose potential energy
Calvin cycle is triggered
In photosystem II, the reaction centre chlorophyll-a absorbs …A… nm wave length of red light causing electrone to become excited and jump into an orbit farther from the atomic nucleus. These electrons are picked up by an …B…, which passes them to an electron transport system constisting of …C… Pick the right choice for A, B and C
A = 680, B = Primary electron acceptor, C = PQ, Cytochrome b6f complex, PC
A = 700, B = Ferredoxin, C = Fd-NADP reductase
A = 680, B = Water, C = ATP synthase
A = 700, B = Primary electron acceptor, C = Pheophytin, PQ
