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NEET Biology Solved Question Paper 2005

Multiple Choice Questions

31.

Which one of the following does'nt help in molecule transport?

Diffusion
Osmosis
Surface tension
Active transport

32.

Stomatal opening in plants occurs due to influx of

Na
K
ABA
Auxins

33.

Energy transfer in photosynthesis occurs as

Phycoerythrin $\to$ Phycocyanin $\to$ Carotenoid $\to$ Chlorophyll a
Chlorophyll b $\to$ Carotenoid $\to$ Phycoerythrin $\to$ Chlorophyll a
Phycocyanin $\to$ Phycoerythrin $\to$ Carotenoid $\to$ Chlorophyll a
Chlorophyll b $\to$ Carotenoid $\to$ Phycocyanin $\to$ Chlorophyll a

34.

Litmus is obtained from

Rocella montagnei
Lasallia postulata
Both (a) and (b)
Cladonia crispata

35.

Commercial cork is obtained from

Flax
Juglans regia
Hevea brassiliansis
Quercus suber

36.

Tea and coffee are affected by

Phytophthora
Cephaleuros
Herviella
Albugo candida

37.
In photosynthesis what occurs in PS-II?

It takes longer wavelength of light and e^- from H₂O

It takes shorter wavelength of light and e^- from H₂O

It takes longer wavelength of light and e^- from NADP

It takes shorter wavelength of light and e^- from NADP

It takes shorter wavelength of light and e^- from H₂O

Green plants and algae use two type of photo-system called Photosystem- I (PS-I) and Photosystem- II (PS -II).

In PS-I, chlorophyll absorb maximum at 700 nm wavelength of light thus reaction centre is P₇₀₀ and PS-II absorb maximum at 680 nm wavelength of light thus reaction centre is P₆₈₀. P₆₈₀ (PS-II) extracts an electron from water, returning to its unexcited state because hydrolysis of H₂O occurs in PS-II. So, O₂ evolved in PS-II come from water.