Plant Pathology - Study Mode

[#416] Which technology is used to produce monoclonal antibodies?
Correct Answer

(B) Hybridoma technology

Explanation

Solution: Hybridoma technology is used to produce monoclonal antibodies. Hybridoma technology is one of the most common methods used to produce monoclonal antibodies. In this process, antibody-producing B lymphocytes are isolated from mice after immunizing the mice with specific antigens and are fused with immortal myeloma cell lines to form hybrid cells, called hybridoma cell lines.

[#417] The mineralisation of organic phosphorus has been studied in relation to . . . . . . . . ratio.
Correct Answer

(C) C/N/P

Explanation

Solution: The mineralization of organic phosphorus has been studied about C/N/P ratio. Mineralization is a process through which organic phosphorus in soil is converted into inorganic phosphorus with the help of soil microbes. Immobilization, on the other hand, is the reverse of mineralization. Organic matter is initially synthesized in aquatic ecosystems mostly through algal photosynthesis, and the C : N : P. the ratio is well known to be close to the Redfield ratio. However, during the decomposition of organic matter, the behavior and the rates of mineralization of C, N, and P can vary.

[#418] Cytochrome is
Correct Answer

(B) Fe-containing porphyrin pigment

Explanation

Solution: Cytochrome is a Fe-containing porphyrin pigment. Cytochromes are redox-active proteins containing a heme, with a central Fe atom at its core, as a cofactor. They are involved in the electron transport chain and redox catalysis. Cytochrome function is linked to the reversible redox change from ferrous (Fe(II)) to the ferric (Fe(III)) oxidation state of the iron found in the heme core.

[#419] Cell 'A' with O.P. = 10 atm and T.P. = 5 atm. is contact with cell 'B' having O.P. = 15 atm. and T.P. = 12 atm. The flow of water will be
Correct Answer

(C) From B and A

Explanation

Solution: Cell A has O.P. = 10 atm. And T.P. = 5 atm. DPD = O.P. - T.P. = 10 - 5 = 5 atm. Cell B has O.P. = 15 atm. And T.P. = 12 atm. DPD = 15 - 12 = 3 atm. The water flow from low to high pressure, as the DPD of cell B, is 3 and the DPD of cell A is 5, therefore water will flow from cell B to A.

[#420] Heterodera avenne is
Correct Answer

(B) Cyst nematode

Explanation

Solution: Heterodera avenne is Cyst nematode. Heterodera avenae, the cereal cyst nematode or European cyst nematode, is a plant pathogen and an obligate parasite of cereal crops including barley, oats, wheat and rye. Cereal crops infected with this nematode are more susceptible to infection by fungal diseases such as rhizoctonia root rot. The cysts can withstand harsh conditions and can be spread in soil, by agricultural machinery, by animals, by wind, by dust storms or by other means.