Model Organisms in Research — DU B.Sc. (Hons.) Zoology Previous Year Question Papers

(b) Give the significance of Escherichia coli genome database (EcoCyc). (5) 5. (a) Give the significance of Arabidopsis thaliana as a model for plant molecular genetics. (8) (b) Discuss the role of Lemur/ Rhesus monkey as a model organism for primate research. (7) 6. Write short notes on (any three) of the following : (a) Role of Mus-musculus as a model for human genetic disorders (b) Lumbricus terrestris as a bio-indicator for soil contamination and heavy metal toxicity (c) Life cycle of Lambda phage (d) Xenopus laevis as a model organism for development biology studies May/June2026 1. (a) Define the following : (i) Dauer larva stage (iii) Logarithmic phase (d) Match the organism with its database: (2) (iv) Transgenic Organism i) Danio rerio A. Fly base (b) Fill in the blanks : (5) ii) Caenorhabditis elegans B. Xenbase (i) BLAST is a tool used to compare iii) Drosophila C. Worm base sequences. iv) Frog D. Z-fin (ii) Danio rerio belongs to class of vertebrates. 2. (a) Give the biology and lifecycle of Caenorhabditis (iii) Drosophila is cultured in the lab using elegans. Discuss its scientific contribution in medium. research. (10) (iv) is an important tool for gene (b) With the help of suitable examples, differentiate editing. between a model organism and an experimental (v) The full form of MOEFCC is organism and describe the distinguishing features of model organisms in research? (5) (c) True or false : (4) (i) The integrated form of lambda DNA is 3. (a) Discuss the morphology, lifecycle and maintenance of Drosophila melanogaster cultures in called a plasmid. (ii) Lumbricus terrestris is a unisexual organism. (b) Discuss the role of regulatory bodies in animal research? (6) (iii) Tetrahymena thermophila shows nuclear dimorphism. 4. (a) Describe the lifecycle and industrial applications (iv) Xenopus laevis is an allotetraploid species. of Saccharomyces cerevisiae. (10)