Genetics And Plant Breeding - Study Mode
[#646] Photosystem-II takes place in
Correct Answer
(B) Grana
Explanation
Solution: Photosystem-II takes place in Grana. Photosystem II is the first protein complex in the light-dependent reactions of oxygenic photosynthesis. It is located in the thylakoid membrane (Grana) of plants, algae and cyanobacteria. Within the photosystem, enzymes capture photons of light to energize electrons that are then transferred through a variety of coenzymes and cofactors to reduce plastoquinone to plastoquinol. The energized electrons are replaced by oxidizing water to form hydrogen ions and molecular oxygen.
[#647] The modern method of seed storage is
Correct Answer
(B) Ultra dry
Explanation
Solution: The modern method of seed storage is Ultra dry. Dry storage with control of moisture content but not temperature. Orthodox seeds will retain viability longer, when dried to low moisture content (48%) and then stored in a sealed container or in a room in which humidity is controlled, than when stored in equilibrium with ambient air humidity.
[#648] The first ever inter generic cross was successfully performed between bamboo and sugarcane by
Correct Answer
(B) T. S. Venkatraman
Explanation
Solution: The first-ever inter-generic cross was successfully performed between bamboo and sugarcane by T. S. Venkatraman. Sir Tiruvadi Sambasiva Iyer Venkataraman was an Indian botanist, agronomist and plant geneticist who specialized in the study and hybridization of sugarcane. In 1936, he attempted to develop a further intergeneric hybrid of sugarcane and the indigenous Bambusa arundinacea bamboo, intended to combine the height of the latter with the sugar percentage of the former.
[#649] Protandry are found in
Correct Answer
(C) Both A and B
Explanation
Solution: Protandry is found in both Maize and Sugarbeet. Protoandry is the condition in which an organism begins life as a male and then changes into a female. The condition of flowers whose male parts mature before the female ones, or the arrival of males before females at a mating site. Maize is generally protandrous, that is, the male flower matures earlier than the female flower. The primary method of pollination in sugarbeet is cross pollination due to the lack of synchrony between pollen release and receptiveness of the stigma, a condition of protoandry.
[#650] Mutant cereal variety of cereal is
Correct Answer
(C) Jagannath
Explanation
Solution: The mutant cereal variety of cereal is Jagannath. Rice is the most important tropical cereal and it supplies a large number of variety developed in India through mutation breeding involving the parent line. Unlike the short height dwarfing gene, Jagannath possesses important low land variety characteristics. The short height of the variety may be due to the involvement of more than one dominant gene. It is a Board Spectrum of field resistance to major pests and diseases. And fairly resistant to stem borer.