Biology : Photosynthesis in Higher Plants

The law of limiting factors for photosynthesis was enunciated by

• R. Hill

• Calvin

• Krebs

• Blackman

Photosynthesis in C₄ plants is relatively less limited by atmospheric CO₂ levels because

• four carbon acids are the primary initial CO₂ fixation products

• the primary fixation of CO₂ is mediated via PEP carboxylase

• effective pumping of CO₂ into bundle sheath cells

• RUBISCO in CO₄ plants has higher affinity for CO₂

Chlorophyll in chloroplasts is located in

• grana

• pyrenoid

• stroma

• both (a) and (c)

Pigment anthocyanin is located in

• chloroplast

• chromoplast

• cytoplasm

• vacuole

In photosythesis action and absorption spectrum were related by

• Von Helmont

• Engelmann

• Emerson

• Lavosier

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