Genetics And Plant Breeding - Study Mode

[#616] Gladiolous is produced through
Correct Answer

(C) Bulbs

Explanation

Solution: Gladiolus is produced through Bulbs. Gladiolus grows from a large bulb each year, then dies back and regrows the following year. This “bulb” is known as a corm, and the plant grows a new one right on top of the old one each year. The cormels of the first year would be normally of very small size and would not yield any flowers.

[#617] The F 2 ratio in polymeric gene action is
Correct Answer

(D) 9 : 6 : 1

Explanation

Solution: The F2 ratio in polymeric gene action is 9 : 6 : 1. Polymeric gene carriers are a potential alternative to using viral vectors. Polymeric carriers have relatively low immunogenicity and cytotoxicity. In addition, polymeric carriers can accommodate large-size DNA, be conjugated with appropriate functionalities, and be administered repeatedly. The F 2 ratio in polymeric gene action is 9 : 6 : 1.

[#618] The charecters are transmitted from generation to generation through chromosome was proposed by
Correct Answer

(C) Strassburger and Hertwig

Explanation

Solution: The characters are transmitted from generation to generation through chromosomes as proposed by Strassburger and Hertwig. Heredity refers to specific mechanisms by which characteristics or traits are passed from one generation to the next via genes. Genes encode the information for making specific proteins, which are responsible for the specific traits of an individual.

[#619] The acceptor of CO 2 in C 3 -plant is
Correct Answer

(C) 1, 5 ribulose biphosphate

Explanation

Solution: The acceptor of CO 2 in the C 3 -the plant is 1, 5 ribulose biphosphate (RUBP a 5 Carbon compound). The enzyme RuBisCO catalyzes the carboxylation of ribulose-1,5-bisphosphate, RuBP, a 5-carbon compound, by carbon dioxide (a total of 6 carbons) in a two-step reaction. The product of the first step is an enediol-enzyme complex that can capture CO 2 or O 2 . Thus, enediol-enzyme complex is the real carboxylase/oxygenase.

[#620] Theory of 'Lac Operon' was given by Jacob and Monod which is applicable to
Correct Answer

(C) Only prokaryotes

Explanation

Solution: The theory of 'Lac Operon' was given by Jacob and Monod and applies to only prokaryotes. The lactose operon ( lac operon) is an operon required for the transport and metabolism of lactose in E. coli and many other enteric bacteria. This lactose metabolism system was used by François Jacob and Jacques Monod to determine how a biological cell knows which enzyme to synthesize. Their work on the lac operon won them the Nobel Prize in Physiology in 1965.