Horticulture - Study Mode
[#181] Glycoalkaloids imparting bitter taste in brinjal are
Correct Answer
(B) Solasodine
Explanation
Solution: Glycoalkaloids impart a bitter taste in brinjal are Solasodine . The presence of two kinds of steroidal saponosides imparts a bitter taste to eggplant. They are glycoalkaloids and melongosides. Solasodine is a poisonous alkaloid chemical compound that occurs in plants of the family Solanaceae. It has diuretic, anticancer, antifungal, cardiotonic, anti-spermatogenetic, antiandrogenic, immunomodulatory, antipyretic and various effects on the central nervous system.
[#182] Arabica coffee is
Correct Answer
(C) Tetrapolid
Explanation
Solution: Arabica coffee is Tetraploid . It is a species of flowering plant in the coffee and madder family Rubiaceae. It is believed to be the first species of coffee to have been cultivated and is currently the dominant cultivar, representing about 60% of global production. Coffea arabica is the only polyploid species of the genus Coffea, as it carries 4 copies of the 11 chromosomes (44 total) instead of the 2 copies of diploid species, thus tetraploid.
[#183] Arka Prasan is a variety of
Correct Answer
(B) Ridge gourd
Explanation
Solution: Arka Prasan is a variety of Ridge gourd . It is open pollinated early variety with green, long, tender fruits, and excellent cooking quality. It is usually ready within 42 - 45 days for first picking and Yields 26.0 t/ha in 120 - 135 days. It is mostly recommended for cultivation in Karnataka.
[#184] Browning of media causing drying of explants is mainly due to
Correct Answer
(A) Tannins
Explanation
Solution: Browning of media causing drying of explants is mainly due to Tannins . The underlying cause of tissue browning is the accumulation and subsequent oxidation of phenolic compounds in the tissue and culture media. Tannins (commonly referred to as tannic acid) are water-soluble polyphenols that are present in many plant foods. It is mostly responsible for the browning of media and drying of explants in culture.
[#185] Cucumber striped beetle is a vector of
Correct Answer
(C) Bacterial wilt
Explanation
Solution: Cucumber striped beetle is a vector of Bacterial wilt . Adults feed on flowers, leaves and fruit, but focus their feeding on the undersides of developing fruit during warm periods. Feeding on flowers and leaves may result in severe defoliation, whereas feeding on fruit produces scarring damage that directly reduces yield. In addition to direct feeding damage, the striped cucumber beetle (along with the spotted cucumber beetle) is the primary vector of bacterial wilt disease in cucurbits, caused by the pathogen Erwinia tracheiphila .