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Q.30 A single base pair of DNA weighs 1.1 × 10−21 grams. How many picomoles of a plasmid vector of length 2750 bp are contained in 1 μg of purified […]

Q.29 In an exponentially growing batch culture of Saccharomyces cerevisiae, the cell density is 20 g l−1 (DCW), the specific growth rate (μ) is 0.4 h−1 and substrate uptake rate […]

Q.28 Match the entries in Group I with those in Group II. Group I                                  […]

Q.27 In zinc finger proteins, the amino acid residues that coordinate zinc are (A) Cys and His (B) Asp and Glu (C) Arg and Lys (D) Asp and Arg Zinc […]

Q.26 Which one of the following DNA sequences carries an invert repeat? (A) ATGAGCCCCGAGTA TACTCGGGGCTCAT (B) ATGAGCCGGCTCTA TACTCGGCCGAGAT (C) ATGAGCCGAGCCTA ACTCGGCTCGGAT (D) ATGAGCCTATGGTA TACTCGGATACCAT An inverted repeat in DNA is […]

Q.25 The helix content of a protein can be determined using (A) an infrared spectrometer (B) a fluorescence spectrometer (C) a circular dichroism spectrometer (D) a UV-Visible spectrophotometer Circular dichroism […]

Q.24 The molarity of water in a water : ethanol mixture (15 : 85, v/v) is approximately (A) 0.85 (B) 5.55 (C) 8.5 (D) 55.5   The molarity of water […]

Q.23 In transmission electron microscopy, electron opacity is greatly enhanced by treating the specimen with (A) ferrous ammonium sulfate (B) uranium acetate (C) sodium chloride (D) basic fuchsin Transmission electron […]

Q.22 While searching a database for similar sequences, E value does NOT depend on the (A) sequence length (B) number of sequences in the database (C) scoring system (D) probability […]

Q.21 Synteny refers to (A) gene duplication from a common ancestor (B) a tree representation of related sequences (C) the extent of similarity between two sequences (D) local conservation of […]