Archives: Questions and Answers

Which of the following combinations of plant diseases and the types of their causal organisms is/are CORRECT? (A) Late blight of potato − Bacteria (B) Black rot of crucifer − Bacteria (C) Tungro disease of rice − Mycoplasma (D) Root knot of tomato − Nematode  

Match the types of ecological energy productivity in Group 1 with their respective definitions in Group 2. Group 1 Group 2 (P) Net primary productivity (i) Total amount of energy produced by autotrophs (Q) Gross primary productivity (ii) Amount of energy stored by autotrophs after respiration (R) Net productivity (iii) Net gain of energy by … Read more

Match the types of ecological interactions in Group 1 with their respective definitions in Group 2. Group 1 Group 2 (P) Protocooperation (i) One species is harmed but the other is neither harmed nor benefited (Q) Commensalism (ii) A type of mutualism where one species is benefited more than the other (R) Amensalism (iii) Both … Read more

Match the plant products in Group 1 with the plant species in Group 2 that produce them and the respective plant parts in Group 3 where they accumulate the most. Group 1 Group 2 Group 3 (P) Liquorice (i) Cinchona calisaya (a) Leaf (Q) Quinine (ii) Lawsonia inermis (b) Root (R) Henna (iii) Glycyrrhiza glabra … Read more

With reference to Agrobacterium tumefaciens mediated plant transformation, match the virulence factors in Group 1 with their protein types in Group 2. Group 1 Group 2 (P) VirG (i) Kinase (Q) VirA (ii) Helicase (R) VirE (iii) Transcriptional activator (S) VirC (iv) Single strand binding protein (A) P−i, Q−ii, R−iv, S−iii (B) P−iii, Q−i, R−ii, … Read more

Match the inhibitors in Group 1 with their respective targets in Group 2. Group 1 Group 2 (P) Oligomycin (i) Cytochrome bc1 complex (Q) Antimycin A (ii) Photosystem II (R) 3-(3,4-dichlorophenyl)-1,1-dimethylurea (DCMU) (iii) K+^++ ionophore (S) Valinomycin (iv) FO ATP synthase (A) P−i, Q−ii, R−iii, S−iv (B) P−iv, Q−i, R−ii, S−iii (C) P−iii, Q−i, R−iv, … Read more

In wild-type Arabidopsis thaliana, the four types of floral organs (sepal, petal, stamen, carpel) are arranged in concentric whorls from outside to inside. With reference to the ABC model of floral organ patterning, match the homeotic mutants in Group 1 with their respective arrangements of organs in the four whorls given in Group 2. Group … Read more

In Calvin-Benson cycle, to produce 1 molecule of glyceraldehyde 3-phosphate by fixing 3 molecules of carbon dioxide, 9 molecules of ATP and ________ molecules (in integer) of NADPH are typically utilized.  

Which of the following statements is/are CORRECT with reference to rubber production from plants? (A) Para rubber is produced from Hevea brasiliensis (B) India rubber is produced from Ficus elastica (C) Panama rubber is produced from Manihot glaziovii (D) Ceara rubber is produced from Castilla elastica  

Which of the following selectable marker genes is/are used for herbicide tolerance during genetic transformation of plants? (A) hpt (B) bar (C) nptII (D) pmi