MCQs-Biology-Basics in agricultural biology Welcome to your Basics in agricultural biology 1. In which crop higher amylose and amylopectin is desirable trait? Pulses Oilseeds Cereals Cotton None 2. 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 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. 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 5. Which of the following may not be considered as phenotypic marker? Dwarfness Silent mutation in DNA polymerase Yellow green leaf color Curly leaves None 6. What is IPM Integrated pest mantainance Integrated pest management Innovative plant mutagenesis None of the above None 7. Which of the following best describes the reason behind little genetic studies on roots? Roots does not perform essential role in the crop yield Root traits are difficult to breed Roots are located underground limiting its accessibility in order to study the genetic behaviour Roots are genetically not diverse None 8. Backcrossing is used… To introduce a one or few characters in otherwise a elite cultivar Only to test the gene dominance Only to develop NILs None of the above None 9. What is the scientific name of rice Oryza sativa Triticum aestivum Brassica juncea Vigna radiata None 10. Why linolenic acid can not be stored for longer time? Because of the inefficient storage methods Residual impurities affect the quality of the linolenic acid It oxidises rapidly It is highly flammable None 11. Which of the following is true about fatty acids? Fatty acids are present in the cell wall Fatty acid generally contain more than one carboxylic groups Long carbon chain containing acids These are the highly polar acids None 12. What is genetic recombination? Broken DNA after repair sometimes generate newer genetic combinations Homologous chromosome cross over that leads to new genetic combination Non homologous end joining repair mechanism also leads to the genetic recombinations All of the above None 13. Different colours of flower are because of… Anthocyanins Carotenoids Chlorophylls Proteins None of the above I and II None 14. What is the unit of yield? Kg Kg/ha Kgha Kg/annum None 15. 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 Please fill in the comment box below. Time's up
