Genetics And Plant Breeding - Study Mode

[#531] C 4 photosynthesis pathway is not in
Correct Answer

(A) Potato

Explanation

Solution: The C 4 photosynthesis pathway is not in potatoes. The C 4 pathway acts as a mechanism to build up high concentrations of carbon dioxide in the chloroplasts of the bundle sheath cells. The resulting higher level of internal carbon dioxide in these chloroplasts serves to increase the ratio of carboxylation to oxygenation, thus minimizing photorespiration. Potato is classified as C 3 plants that assimilate atmospheric CO 2 directly through the C 3 photosynthetic pathway.

[#532] The chromosomes are most condensed at
Correct Answer

(C) Anaphase

Explanation

Solution: The chromosomes are most condensed at Anaphase. During prophase, the chromosomes condense and the nuclear envelope dissolves. During metaphase, the chromosomes align at the center of the cell. During anaphase, the sister chromatids are separated and pulled to opposite ends of the cell in the most condensed stage.

[#533] Dee-Gee-Woo-Gen is the source of dwarfing gene in
Correct Answer

(A) Rice

Explanation

Solution: Dee-Gee-Woo-Gen is the source of dwarfing gene in Rice. Analysis of the genetic lineage of the majority of the cultivated rice varieties in tropical Asia reveals that sd1 from DGWG (Dee-Gee-Woo-Gen) is the major source of dwarfing gene. The high amount of genetic homogeneity renders rice plants vulnerable to the epidemic of diseases and insect pests. The phenotype of sd-1 is consistent with dwarfism that results from a deficiency in gibberellin (GA) plant growth hormones.

[#534] Pusa Karishma and Mahak arc new varieties of
Correct Answer

(C) Mustard

Explanation

Solution: Pusa Karishma and Mahak are new varieties of Mustard. Pusa Karishma, Brassica juncea, a variety of mustard developed by IARI with large plants producing yellow-coloured seeds with low erucic acid, suitable for irrigated lands. Pusa mahak is suitable for early September, sowing under irrigated situations. Disease escape due to early maturity. The average yield is 597 - 1049 Kg/ha.

[#535] Central Dogma of protein synthesis in Teminism is
Correct Answer

(A) g RNA > DNA > m RNA > Protein

Explanation

Solution: Central Dogma of protein synthesis in Teminism is g RNA > DNA > m RNA > Protein. The central dogma of molecular biology is a theory stating that genetic information flows only in one direction, from DNA to RNA, to protein, or RNA directly to protein. The central dogma suggests that DNA contains the information needed to make all of our proteins, and that RNA is a messenger that carries this information to the ribosomes. Teminism is a theory known as reverse transcription.