Genetics And Plant Breeding - Study Mode
[#776] Lysine is limiting amino acid in
Correct Answer
(A) Cereals
Explanation
Solution: Lysine is a limiting amino acid in Cereals . Cereals contain low amounts of lysine, and consequently, lysine is often the first limiting amino acid in diets that are high in cereals. Lysine is an essential amino acid, meaning it is necessary for human health, but the body cannot make it.
[#777] For induction of mutations in crop plants, X-rays were first used by
Correct Answer
(C) H. J. Muller (1927)
Explanation
Solution: For the induction of mutations in crop plants, X-rays were first used by H. J. Muller (1927). Mutation involves sudden changes in an organism's genetic code. Herman Muller studied the hereditary characteristics of fruit flies and, in 1927, discovered that the number of genetic mutations observed in fruit flies increased when they were exposed to x-rays. Hermann Joseph Muller conducted three experiments in 1926 and 1927 that demonstrated that exposure to x-rays, a form of high-energy radiation, can cause genetic mutations, and changes to an organism's genome, particularly in egg and sperm cells.
[#778] The variety of wheat developed from spring × winter wheat crosses is termed as
Correct Answer
(A) VEERY
Explanation
Solution: The variety of wheat developed from spring × winter wheat crosses is termed VEERY . The ‘Veery’ lines resulted from a cross between a Russian winter wheat, ‘Kavkaz’, and a Mexican spring wheat, ‘Buho’. These new lines showed improved resistance to stripe and leaf rust pathogens, which helped create the second generation of high-yielding wheat.
[#779] Cryopreservation can not be done for microorganisms which are
Correct Answer
(D) Aerobic
Explanation
Solution: Cryopreservation cannot be done for Aerobic microorganisms. Cryopreservation is a process where organelles, cells, tissues, extracellular matrix, organs, or any other biological constructs susceptible to damage caused by unregulated chemical kinetics are preserved by cooling to very low temperatures. Cells might be damaged if the intracellular concentration of solutes is high. The leakage of certain solutes from the cell during freezing should be checked. The physiological status of the plant material is also essential.
[#780] The objectionable weed in Oat is
Correct Answer
(B) Avena fatua
Explanation
Solution: The objectionable weed in Oat is Avena fatua . Objectionable weed is also known as Satellite weed. Objectionable weed: A noxious weed, whose seeds are difficult to separate, once mixed with crop seeds. The weeds that mature at the same time & height as a host plant have a similar size and shape as the crop seeds. Wild oat (Avena fatua) is common in spring wheat (Triticum aestivum.