Genetics And Plant Breeding - Study Mode
[#511] The major transportable form of amino acid is
Correct Answer
(D) Aspargine
Explanation
Solution: The major transportable form of amino acid is Aspargine. Asparagine is one of the important amino acids for the long-distance transport of nitrogen (N) in plants. Asparagine is α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group, an α-carboxylic acid group, and a side chain carboxamide, classifying it as a polar, aliphatic amino acid. It is non-essential in humans, meaning the body can synthesize it. It is encoded by the codons AAU and AAC.
[#512] The reason behind reversion is
Correct Answer
(B) Mutation
Explanation
Solution: The reason behind reversion is Mutation. Reversions are genetic alterations that reverse the effect of mutations. Some revertants are due to compensatory changes in genes different from the ones with the original mutation. Reversion occurs when the effects of one mutation are counteracted by a second mutation. It refers specifically to phenotype.
[#513] The isolation distance maintained for paddy is
Correct Answer
(B) 3 m
Explanation
Solution: The isolation distance maintained for paddy is 3 m. Isolation distance is the minimum separation required between two or more varieties of the same species to keep the seed pure. The isolation distance is essential to prevent pollination from unwanted pollen in the case of cross-pollinated and often cross-pollinated species. Isolation distance should be maintained to avoid varietal contamination of seed. Isolation distance is the distance by which the seed crop is separated from any other variety of the same crop.
[#514] The selection process for balanced combination of genes in an individual is called as
Correct Answer
(B) Co adaptation
Explanation
Solution: The selection process for balanced combination of genes in an individual is called Co adaptation. Co-adaptation is the process by which two or more species, genes or phenotypic traits undergo adaptation as a pair or group. This occurs when two or more interacting characteristics undergo natural selection together in response to the same selective pressure or when selective pressures alter one characteristic and consecutively alter the interactive characteristic.
[#515] During seed production the methods followed to facilitate flowering and seed production in cabbage is
Correct Answer
(D) All of the above
Explanation
Solution: During seed production the methods followed to facilitate flowering and seed production in cabbage are Stump method, the Stump with central core intact method, and Head intact method. Heads are cut just below the base through sharp knife, keeping the stem with outer whorl of leaves. Beheaded portion of plant is called the stump. This method is termed as stump method. Stump with central core intact method is improved version of stump method in which heads are chopped on all sides with downward perpendicular cuts in such a way that central core is not damaged. In head intact method, head is kept intact and only a cross-cut is given to facilitate the emergence of stalk.