Plant Biology — Prelims Questions

Which of the following statements about C4 photosynthesis is/are correct? 1. C4 plants are more efficient in hot and dry conditions compared to C3 plants. 2. The primary CO2 fixation enzyme in C4 plants is RuBisCO. 3. C4 plants exhibit Kranz anatomy in their leaves. Select the correct answer using the code given below:

Consider the following plant hormones and their primary functions: 1. Auxin: Promotes cell division 2. Gibberellin: Promotes stem elongation 3. Cytokinin: Delays senescence 4. Abscisic Acid (ABA): Promotes stomatal opening Which of the pairs given above are correctly matched?

With reference to plant biotechnology, consider the following statements: 1. Plant tissue culture can be used for micropropagation to produce disease-free plants. 2. Bt Cotton is the only Genetically Modified (GM) food crop currently approved for commercial cultivation in India. 3. Gene editing techniques like CRISPR-Cas9 offer more precise genetic modifications than traditional genetic engineering. Which of the statements given above are correct?

Which of the following is NOT a macronutrient required by plants?

Consider the following statements regarding the economic importance of plants in India: 1. Rice and Wheat are staple food crops, while Sugarcane and Cotton are major cash crops. 2. Neem and Tulsi are examples of medicinal plants widely used in traditional Indian systems. 3. The Protection of Plant Varieties and Farmers' Rights Act, 2001, aims to protect farmers' rights over traditional varieties. Which of the statements given above are correct?