Tag: dbt jrf 2019

92. A mutation in the coding region of a mammalian gene leads to the loss of a single amino acid at the Nterminus of the nascent polypeptide. This is possible […]

What would be the best assay to detect and quantify a small and low abundant peptide in a biological sample? (1) Lowry’s assay (2)Immuno-diffusion (3)Radioimmunoassay (4)Immunoblot Introduction: Peptides, especially those […]

89. Under which of the following circumstances do T cells develop anergy? (1) With the expression of CD69 on T cells. (2) When the CD4/ CD8 molecules present on T […]

88. Midblastula transition is a phenomenon that occurs during early development in certain organisms. It refers to: (1) Transition from maternal to zygotic gene expression (2) Transition of morphology during […]

87. Hayflick limit of mammalian cells refers to which one of the following? (1) Cells in primary cell culture undergo senescence after 50-60 passages. (2)Primary cells cultured in vitro do […]

86. Which one of the following sets of protein factors, named as Yamanaka factors, can be used to convert mammalian somatic cells into induced pluripotent stem cells? (1) Oct3/4, Sox2, […]

85. For identifying the distribution of a specific protein in a tissue, which one of the following types of immunofluorescence microscopic methods has attained the highest level of resolution? (1) […]

84. For efficient translation of certain eukaryotic mRNAs under many physiological and pathological stress conditions, the small subunit of ribosome binds to the mRNA at the: (1) 5‵ Cap. (2) […]

80. Which one of the following materials is a bioplastic? (1) Polypropylene (2) Alginate (3) Polyhydroxybutyrate (4) Dextran Introduction: With the growing environmental concerns about plastic waste and pollution, the […]

Which one of the following statements about signal recognition particles (SRPs) is INCORRECT? An SRP: (1) contains RNA and protein. (2) is an integral membrane protein. (3) docks with a […]