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Q87. Acoelomates are characterized by The absence of cavity surrounding the internal organs The presence of huge body cavity, as in case of terrestrial animals The presence of air sacs, […]

Q86. From the perspective of developmental origin, which of the following structures is homologous to a tortoise shell? Exoskeleton of a lobster Bones of a fish Skull of humans Feathers […]

Q85. Match the resistance mechanism in Group I with the antibiotic in Group II Group I Group II P. β-Lactamases Q. Enhanced folate metabolism R. Drug efflux S. Phosphorylation of […]

Q84. A mutant of E. coli grows normally on glucose or on glycerol but not on acetate. The most likely metabolic pathway that is defective in this mutant is Glyoxylate […]

Q83. Match the microorganism in Group I with the application in Group II Group I Group II P. Aspergillus oryzae Q. Brevibacterium flavum R. Thiobacillus ferrooxidans S. Saccharomyces cerevisiae T. […]

Q82. A bacterial culture was diluted 1000 fold and 0.1 ml of this diluted sample was spread per plate on nutrient agar. In a triplicate run, the number of colonies […]

Q81. Match the pathogen in Group I with the corresponding disease in Group II Group I Group II P. Bacteria Q. Virus R. Fungi S. Protozoa 1. Measles 2. Candidiasis […]

Q80. Which one of the following events occurs in prokaryotes but NOT in eukaryotes? Protein phosphorylation RNA polymerase and promoter interaction Control of transcription by attenuation Formation of Okazaki fragments […]

Q79. In a lacOc lacZ− / lacO+ lacZ+ partial diploid, of the two lacZ enzymes, only the mutant enzyme (lacZ−) is synthesized constitutively. This observation shows that lacOc mutation is […]

Q78. MHC-I groove can be loaded with peptides of only 8–10 amino acids because MHC-I groove is closed on both ends Fragments of only 8–10 amino acids are generated in […]