Plant Biotechnology — Part 2 MCQs with Explanations

P and R only is the correct answer to “Some of the cytokinins used in plant tissue culture media are given below: P. BAP Q. Zeatin R. Kinetin S. 2iP Which of these are synthetic analogs”. This question is standard in competitive examination syllabi for Plant Biotechnology.

Formation of stable embryos is the correct answer to “Somatic embryogenesis is a procedure in plant tissue culture methodology described best as”. This question is standard in competitive examination syllabi for Plant Biotechnology.

Differentiated and dividing is the correct answer to “Cells of meristemoid are best described as”. This question is standard in competitive examination syllabi for Plant Biotechnology.

Both [A] and [R] are true and [R] is the correct reason for [A] is the correct answer to “Determine the correctness or otherwise of the following Assertion [A] and the Reason [R] . Assertion [A]: A genetically engineered rice that produces beta-carotene in the rice grain is called Golden rice. Reason [R]: Enabling biosynthesis of provitamin A in the rice endosperm gives a characteristic yellow/orange color.”. This question is standard in competitive examination syllabi for Plant Biotechnology.

P-4, Q-1, R-2, S-3 is the correct answer to “Match the herbicides in Group I with the target enzymes in Group II . Group I Group II P. Glyphosate 1. Nitrilase Q. Bromoxynil 2. Acetolactatesynthetase R. Sulphonylureas 3. Dehalogenase S. Dalapon 4. 5-Enolpyruvyl shikimate 3-phosphate synthase”. This question is standard in competitive examination syllabi for Plant Biotechnology.

Enhanced in vitro production of desired metabolite is the correct answer to “Plant secondary metabolites production in suspension culture is mainly targeted for”. This question is standard in competitive examination syllabi for Plant Biotechnology.

Anther and pollen culture is the correct answer to “To produce plants that are homozygous for all traits, the best choice is”. This question is standard in competitive examination syllabi for Plant Biotechnology.

Defective movement protein is the correct answer to “Virus resistant transgenic plants can be developed by the expression of”. This question is standard in competitive examination syllabi for Plant Biotechnology.

None of the above is the correct answer to “Expression of antisense RNA of ACC synthase in transgenic tomato plants inhibited the synthesis of ethylene resulting in”. This question is standard in competitive examination syllabi for Plant Biotechnology.

Liposome-mediated transformation is the correct answer to “Majority of the cereals are highly recalcitrant to Agrobacterium mediated transformation, and so direct transformation methods have been developed to transform such plants. Which of the following direct transformation methods is applicable to intact plant tissues”. This question is standard in competitive examination syllabi for Plant Biotechnology.

Alkaloids is the correct answer to “Vincristine and vinblastine, two commercially important secondary metabolites from Catharanthus roseus, are examples of”. This question is standard in competitive examination syllabi for Plant Biotechnology.

These exhibits strong wound response is the correct answer to “Agrobacterium based transformation of protoplasts obtained from dicots is based on the fact that”. This question is standard in competitive examination syllabi for Plant Biotechnology.

P-3, Q-4, R-1, S-2 is the correct answer to “Match the secondary metabolites (Group I) with the corresponding plant species (Group II) . Group I Group II P. Morphine 1. Datura stramonium Q. Pyrethrins 2. Catharanthus roseus R. Scopolamine 3. Papaver somniferum S. Vincristine 4. Tagetes erecta”. This question is standard in competitive examination syllabi for Plant Biotechnology.

Sodium alginate and dropping it in a solution of calcium nitrate is the correct answer to “Hydrated synthetic seeds which are produced by ion exchange reaction involve mixing the somatic embryos in a solution of”. This question is standard in competitive examination syllabi for Plant Biotechnology.

(A) is true but (R) is false is the correct answer to “Determine the correctness or otherwise of the following Assertion (A) and the Reason (R) . Assertion: Somatic embryogenesis in plants is a twostep process comprising of embryo initiation followed by embryo production. Reason: Embryo initiation is independent of the presence of 2, 4-dichlorophenoxyacetic acid, whereas embryo production requires a high concentration of 2, 4-dichlorophenoxyacetic acid.”. This question is standard in competitive examination syllabi for Plant Biotechnology.

Q, S is the correct answer to “Which of the following statements are true about glyphosate tolerant transgenic plants? P. Transgenic plants detoxify glyphosate. Q. Transgenic plants produce an altered enzyme that is not affected by glyphosate. R. Transgenic plants sequester glyphosate in vacuoles. S. Transgenic plants overcome the inhibition of aromatic amino acid biosynthesis.”. This question is standard in competitive examination syllabi for Plant Biotechnology.