MCQs-Biology-Basics in agricultural biology Welcome to your Basics in agricultural biology 1. Different colours of flower are because of… Anthocyanins Carotenoids Chlorophylls Proteins None of the above I and II None 2. What are mutations? Change in chromatin structures Change in chromatin number Change in the chemical nature of the nitrogenous bases Change in the DNA sequence None 3. What is the harvest index? It is the ratio of the grain yield per unit above ground biomass It is the ratio of grain yield and total plant biomass The ratio of plant biomass to the total grain yield It is the maximum yield produced by a cultivar per unit area None 4. Which of the following category of plants have more evolutionary advantage? Cross pollinating plants, because it helps in creating newer genetic variability Self pollinating plants, because the genome stays uncontaminated with the foreign DNA Vegetatively propagating plants Plants with longer lifespan None 5. Which of the following is not the essential trait in oil crop improvement? Seed yield Total oil content Early maturity None of the above None 6. Silent mutation is Incorporation of chemically different amino acid in a protein Incorporation of chemically same amino acid in a protein Premature protein Structurally different protein None 7. Objective of mutation breeding is To change the genomic DNA Increase the ROS levels in the cells To induce point mutation without affecting any other characters To accelerate the process of genomic rearrangements None 8. Which of the following proteins are involved in the degradation of the other proteins? Ubiquitins Receptor kinases Ion transporters Histone proteins None 9. Which of the following may not be considered as phenotypic marker? Dwarfness Silent mutation in DNA polymerase Yellow green leaf color Curly leaves None 10. What is the difference between two way cross and three way cross? Two way cross is performed between two pure lines and three way cross is performed between F1 plants and a pure line Two way cross is made between two F1 plants, three way cross is performed between F1 plants and a pure line Three way cross offers more genetic variability as compared to two way cross Both are same I and III None 11. Missense mutation Leads to formation of different protein Leads to addition of chemically different amino acid in a protein Leads to Change in non coding part of the gene Is because of the misfolding of the protein None 12. What is IPM Integrated pest mantainance Integrated pest management Innovative plant mutagenesis None of the above None 13. Which of the following is not the essential trait oil crop improvement? Seed yield Total oil content Early maturity Amino acid content None 14. In cross breeding which of the following increase the probability of obtaining targeted phenotype? Using genetically different parents Crossing between two F1 plants Large F2 population Intragenic crossing None 15. What is the unit of yield? Kg Kg/ha Kgha Kg/annum None Please fill in the comment box below. Time's up
