Genetics And Plant Breeding - Study Mode
[#401] Central dogma is also known as
Correct Answer
(A) Teminism
Explanation
Solution: The central dogma is also known as Teminism. The central dogma of molecular biology is an explanation of the flow of genetic information within a biological system. It was first stated by Francis Crick in 1957, then published in 1958: This states that once "information" has passed into protein it cannot get out again. In more detail, the transfer of information from nucleic acid to nucleic acid, or from nucleic acid to protein may be possible, but transfer from protein to protein, or from protein to nucleic acid is impossible. Information means here the precise determination of sequence, either of bases in the nucleic acid or amino acid residues in the protein.
[#402] Which is not an essential element for plants?
Correct Answer
(D) Cadmium
Explanation
Solution: Cadmium is one of the given options that are not an essential element for plants whereas all others like Boron, Iron, and Suplhur are classified as essential elements for plants. Cadmium has no nutritional value for plants. On the contrary, its presence in soil has various deleterious effects by causing physiological, chemical, and structural changes in plants. Of all the heavy metals, cadmium is considered to be the one that is most toxic for plants.
[#403] The progeny of a single homozygous self pollinated plant is known as
Correct Answer
(A) Pure line
Explanation
Solution: The progeny of a single homozygous self-pollinated plant is known as a pure line. A pure line is an organism that always passes down certain phenotypic traits (i.e. physically expressed traits) to its offspring of many generations. An organism is referred to as true breeding for each trait to which this applies, and the term "true breeding" is also used to describe individual genetic traits.
[#404] The seed dormancy of paddy is broken by treatment with
Correct Answer
(C) HNO 3
Explanation
Solution: The seed dormancy of paddy is broken by treatment with HNO 3 . Seed dormancy has been defined as the incapacity of a viable seed to germinate under favorable conditions. Intact seeds were germinated directly in sterilized Petri dishes lined with 3-layer filter paper moistened with 6 ml KNO 3 . All subsequent treatments involved presoaking intact seeds in 1 M or 0.2 M HNO, M H 2 O 2 , and 1000 ppm GA 3 for 24 and 48 hours, before germination. A combination of presoaking for 24 and 48 hours each successively in 0.1 M HNO 3 and 0.1 M H 2 O 2 and 0.2 M HNO 3 and 0.1 M H 2 O 2 was also included in the chemical treatments. After drying at room temperature for 30 minutes to 01 hour, all treated seeds were germinated under the best constant or alternating temperature regime for each species determined from the former germination tests.
[#405] Progeny of a single plant obtained by asexual reproduction is
Correct Answer
(B) Clone
Explanation
Solution: The progeny of a single plant obtained by asexual reproduction is cloned. Cloning is a technique scientists use to make exact genetic copies of living things. To make a clone, scientists transfer the DNA from an animal's somatic cell into an egg cell that has had its nucleus and DNA removed. The egg develops into an embryo that contains the same genes as the cell donor. Then the embryo is implanted into an adult female's uterus to grow.