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Q.89 Which one of the following type of immune cells is responsible for graft rejection? (A) B cells (B) T cells (C) Macrophages (D) Eosinophils T cells are responsible for graft […]

Q.88 Extraembryonic tissues are derived from which one of the following? (A) Ectoderm (B) Endoderm (C) Trophectoderm (D) Mesoderm Extraembryonic tissues are derived from the trophectoderm. This outer layer of the blastocyst […]

Q.87 Which one of the following is characteristic of deuterostomes? (A) Radially symmetric body (B) Bilaterally symmetric body (C) Presence of well-defined digestive system (D) Formation of anus from blastopore Deuterostomes […]

Q.86 Which one of the following is an example of eumetazoans? (A) Dictyostelium (B) Hydra (C) Sponges (D) Volvox Hydra is the only eumetazoan among the options, as it belongs to […]

Q.85 Match the pair of organisms in Group 1 with their characteristic interactions in Group 2 Group 1 P. Photoblepharon palpebratus and Vibrio fischeri Q. Pseudomonas and Bdellovibrio R. Aspergillus and […]

Q.84 An actively growing culture (20 ml) of E. coli (1 × 105 per ml) was mixed with a total of 100 T4 phage particles, grown further for 40 min and […]

Q.83 Based on their properties, match the “Genera” in Group 1 with those in Group 2 Group 1 P. Bacillus Q. Neisseria R. Rhizobium S. Caulobacter Group 2 1. Sarcina […]

Q.82 A new isolate of a facultative anaerobe utilizes either oxygen or pyruvate as terminal electron acceptor. This bacterium was grown either anaerobically with glucose as sole carbon source; or aerobically […]

Q.81 During replication of the E. coli chromosome, Okazaki fragments are produced from (A) only one of the strands of the circular genome (B) both the strands of the circular genome […]

Q.80 Match the names of investigators in Group 1 with their contributions in Group 2: Group 1 P. Joseph Lister Q. John Needham R. Elie Metchnikoff S. Lazaro Spallanzani Group 2 […]