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Photosynthesis in Higher Plants

Multiple Choice Questions

261.

The number of chlorophyll molecules in a quantasome is

50- 100
200- 250
300- 400
500- 600

262.

Active K⁺ exchange mechanism for opening and closing of stomata was given by

Darwin
Levit
Scarth
Khorana

263.

Photosynthetic bacteria have :

pigment system I (only one pigment system)
pigment system II
both (a) and (b)
some other type

264.

Most effective wavelength of light photosynthesis is :

green
violet
red
yellow

265.

C₄ plants, synthesis of sugars/final CO₂ fixation occurs in:

palisade cells
spongy cells
undifferentiated mesophyll cells
bundle sheath cells

266.

Core of chlorophyll is formed by

Fe
Mn
CH₃
Mg

267.

CO₂ acceptor in CAM plants is in :

mesophyll cells
bundle sheath
both
none of the above

268.
The organelles, those take part in photorespiration are :

chloroplast and mitochondria

chloroplast, mitochondria and peroxisome

mitochondria and peroxisome

mitochondria only

chloroplast, mitochondria and peroxisome

Photorespiration occurs only in photosynthetic cells. It was discovered by Decker in tobacco and Mimulus. In this process, three organelles namely chloroplast, Mitochondria and peroxisomes participate. The peroxisome is the main organelle. It refers to a process in plant metabolism where the enzyme RuBisCo oxygenates RuBP, wasting some of the energy produced by photosynthesis.