Stomatal opening in plants occurs due to influx of

• Na

• K

• ABA

• Auxins

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

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

The thylakoid in chloroplast are arranged as

• interconnected disc

• interconnected sacs

• stacked discs

• none of the above

The form of pigment which inhibits germination is

• P₇₆₀

• P₇₃₀

• P₆₅₀

• All of these

In Hatch and Slack pathway

• chloroplast are of same type

• occurs in Kranz anatomy where mesophyll have small chloroplast whereas bundle sheath have granal chloroplast

• occurs in Kranz anatomy when mesophyll have small chloroplast where as bundle sheath have larger, agranal chloroplast

• Kranz anatomy where mesophyll cells are diffused

In Hatch and Slack type plants CO₂ acceptor is

• malate

• pyruvate

• phosphoenol pyruvate

• aspartate

In CAM plants

• stomata open in day and close at night

• stomata remain open in day and night both

• stomata remain closed in day and night both

• stomata open at night and close in day

In C₄ plants, CO₂ combines with

• phosphoglyceric acid

• ribulose diphosphate

• phosphoenol pyruvate

• phosphoglyceraldehyde

70.

Photorespiration is favoured by

• high O₂ and low CO₂

• high CO₂ and low O₂

• high temperature and low O₂

• high humidity and temperature