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Q.22 Which one of the following is NOT used for the measurement of cell viability in animal cellculture?(A) Trypan blue dye exclusion (B) Tetrazolium (MTT) assay(C) LDH activity in the […]

Q.21 Junctional diversity of antibody molecules results from(A) the addition of switch region nucleotides(B) the addition of N and P nucleotides(C) the joining of V, D and J segments(D) mutations […]

Q.20 Disaccharide molecules that contain β(1 → 4) glycosidic linkage are (A) sucrose and maltose (B) sucrose and isomaltose (C) maltose and isomaltose (D) lactose and cellobiose Answer: (D) lactose […]

Q.19 Cesium chloride density gradient centrifugation is commonly used for the separation of DNAmolecules. The buoyant density, ρ, of a double stranded Cs+ DNA is given by the equationρ = […]

Q.18 Which one of the following is NOT an algorithm for building phylogenetic trees?(A) Maximum parsimony (B) Neighbor joining(C) Maximum likelihood (D) Bootstrap Bootstrap is not an algorithm for building […]

Q.17 ATP biosynthesis takes place utilizing the H+ gradient in mitochondria and chloroplasts. Identifythe correct sites of H+ gradient formation.(A) Across the outer membrane of mitochondria and across the inner […]

Q.16 Which one of the following is NOT a therapeutic agent based on nucleic acid for the treatment ofgenetic disorders?(A) Antisense oligonucleotide (B) Ribozyme(C) Aptamer (D) Avidin Answer: (D) Avidin […]

Q.15 In a typical mitotic cell division cycle in eukaryotes, M phase occurs immediately after the(A) G 0 phase (B) S phase (C) G1 phase (D) G2 phase The question […]

Q.14 Which of the following are TRUE for Treponema pallidum?P. It is the causative agent of syphilisQ. It is a spirocheteR. It is a non-motile bacteriumS. It is generally susceptible […]

Q.13 What will be the binding status of regulatory proteins in lac operon when concentrations of bothlactose and glucose are very low in the culture medium?(A) Only the repressor remains […]