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#pest resistance

17 public questions tagged with this topic.

Aptitude and Reasoning - Part 2

Which one of the following statements related to the development of insect-resistant transgenic plants is correct?

This outcome reflects quantitative reasoning, where ratio, percentage and series logic determine correct calculation. Option B captures this correctly because it meets mathematical and logical criteria, consistent with textbook descriptions and experimental observations in aptitude and reasoning.

Ref: Agrawal, Quantitative Aptitude for Competitive Examinations, Chapter 5, Logical Reasoning and Probability, covers ratios, percentages, series completion, time-distance and analytical reasoning explaining problem-solving strategies for competitive assessments.

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Transgenic Plant -1

Proteinase inhibitor genes provide resistance by:

Insect midgut proteases are essential for dietary protein digestion into amino acids required for growth and development. Many Lepidoptera rely predominantly on serine proteases trypsin, chymotrypsin, and elastase active at alkaline pH 10. Proteinase inhibitor genes from plants encode small disulfide-rich proteins that act as pseudo-substrates, tightly occupying enzyme active site forming stable enzyme-inhibitor complex with Ki in nanomolar range. Larvae ingesting inhibitor containing transgenic tissue cannot hydrolyze ingested protein, experience amino acid starvation, upregulate protease syn

Ref: Ryan Annu Rev Phytopathol 1990 inhibitors defense; Johnson PNAS 1989 trypsin; NCBI NBK21541; PubMed 1861469 proteinase inhibitor mode action.

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