Questions
Who demonstrated that photosynthesis is essentially a light-dependent reaction in which hydrogen from a suitable oxidisable compound reduces carbon dioxide?
- Cornelius van Niel
- T.W Engelmann
- Julius von Sachs
- Jan Ingenhousz
- Joseph Priestley
Yellow green is the colour of which of the following pigments present in leaves?
- Chlorophyll a
- Chlorophyll b
- Xanthophylls
- Carotenoids
- None of the above
Which of the following statements is correct about pigments?
- Chlorophyll-b, Xanthophylls and Carotenoids are accessory pigments.
- Only Xanthophylls and Carotenoids are accessory pigments.
- Accessory pigments protect Chlorophyll-a from Photo-oxidation.
- Both 1 and 3
- Both 2 and 3
Water splitting complex associated with the PS II is physically located at which of the following sites?
- Outer surface of the thylakoid membrane
- Inner side of the thylakoid membrane
- Stroma
- Thylakoid lumen
- Inner chloroplast membrane
Which of the following is a C4 plant?
- Sugarcane
- Maize
- Sorghum
- Millet
- All of the above
Which of the following molecules acts as primary acceptor of CO2 in photosynthesis?
- Oxaloacetic acid
- 3-phosphoglyceric acid
- Ribulose bisphosphate
- Pyruvic acid
- Triose phosphate
Which of the following methods is used to detach peripheral membrane proteins of thylakoid?
- Sodium carbonate treatment
- Mechanical shearing
- Detergent treatment
- Organic solvent treatment
- Gradient centrifugation
Which of the following statements is correct about the kranz anatomy?
- ‘Kranz’ means ‘breath’
- The bundle sheath cells form a single layer around the vascular bundles.
- The bundle sheath cells have no intercellular spaces.
- The bundle sheath cells have thin walls for easy gaseous exchange.
- All of the above
Anoxygenic photosynthesis is performed by which of the following bacteria?
- Green sulphur bacteria
- Purple bacteria
- Acidobacteria
- Heliobacteria
- All of the above
C3 plants show saturation at about which of the following concentrations of CO2?
- 360 μlL-1
- 400 μlL-1
- 450 μlL-1
- 0.03 per cent
- None of the above
Crassulacean acid metabolism is a carbon fixation pathway that evolved in which of the following plants?
- Monocot
- Dicot
- Xerophytes
- C3 plants
- C4 plants
Which of the following pigments is the only xanthophyll that is known to possess pro-vitamin A activity for mammals?
- Lutein
- Zeaxanthin
- Neoxanthin
- Violaxanthin
- Cryptoxanthin
Carbon fixation is an example of which of the following reactions?
- Endothermic reaction
- Endothermic redox reaction
- Exothermic reaction
- Exothermic redox reaction
- Reduction reaction
Phycobilisomes are absent in which of the following species?
- Cyanobacteria
- Red algae
- Glaucophytes
- Higher plants
- None of the above
Which of the following statements is incorrect?
- Ferredoxin is an electron carrier in ETC
- Plastocyanin is an insoluble protein
- Chlorophyll a0 is an early electron acceptor
- QK-A is an early electron acceptor
- MGDG II is a lipid
Which of the following statements is correct about C4 plants?
- Mesophyll cells are rich in RuBisCO enzyme.
- Bundle sheath cells lack RuBisCO enzyme.
- Aspartic acid formed in bundle sheath cells is transported to mesophyll cells.
- CO2 is released in bundle sheath cells.
- All of the above
Which of the following statements is correct about C4 carbon fixation?
- 4-carbon acid transported from mesophyll cells may be pyruvate or alanine.
- 3-carbon acid transported back from bundle-sheath cells may be malate or aspartate.
- Enzyme that catalyses decarboxylation in maize and sugarcane is NADP-malic enzyme.
- Enzyme that catalyses decarboxylation in millet is PEP carboxykinase.
- Enzyme that catalyses decarboxylation in Panicum maximum is NAD-malic enzyme.