List of top Botany Questions on Biotechnology asked in CUET (PG)

Identify the sequence of events which happens during germination of pollen grains. A. Secretion of stigmatic exudates B. Formation of callose plug in pollen tube C. Adherence of pollen grain to stigma D. Entry of pollen tube into ovule E. Degradation of stigmatic cells by cutinase. Choose the correct answer from the options given below:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): rDNA technology is a two-component system: a compatible host and a vector. Reason (R): The vector provides essential sequences required for its replication in a compatible host which provides various replication functions. In the light of the above statements, choose the most appropriate answer from the options given below: