Which of the following would not possible to address using a Northern Blot?
A. Location of restriction sites in a particular gene
B. Spatial expression of a particular gene
C. Temporal expression of a particular gene
D. mRNA size
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In southern blotting . . . . . . . . is separated by gel electrophoresis
A. DNA
B. m-RNA
C. t-RNA
D. Protein
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A restriction enzyme AluI with a 4-bp recognition site produces restriction fragments that should be
A. 4096 bp
B. 256 bp
C. 16 bp
D. 436 bp
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Terminal transferase is used
A. To add base at the 3' end of the DNA
B. To add base at the 5' end of the DNA
C. To carry out nick translation
D. To transfer phosphate at the 3' end of the DNA
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Mung bean nuclease could be used for
A. DNA synthesis
B. Nucleotide hydrolysis
C. Trimming single stranded regions in DNA
D. Removal of phosphate groups from the ends of the DNA
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Many plasmids have Ampicillin marker. This implies
A. The plasmids contain genes for ampicillin biosynthesis
B. Ampicillin is required for bacterial growth after transformation
C. The plasmid contains the gene encoding β-lactamase
D. Ampicillin is essential for cell survival
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DNA synthesis can be measured by estimating incorporation of radio-labelled
A. Uracil
B. Ribose sugar
C. Thymidine
D. Adenine
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In agarose gel electrophoresis
A. DNA migrates towards the negative electrode
B. Supercoiled plasmids migrate slower than their nicked counterparts
C. Larger molecules migrate faster than smaller molecules
D. Ethidium bromide can be used to visualize the DNA
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A cloning vector consisting of CoS site inserted in a plasmid, used to clone DNA fragments of λ phage is
A. Phage mid
B. Cosmid
C. Plasmid
D. YAC
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Northern blotting is developed by
A. Ed Southern
B. Thomas et al
C. Alwine et al
D. E. Northern
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Which of the following is incorrect?
A. The broken cell preparation is loosely referred to as cell-free preparation or HOMOGENATE
B. SUPERNATANT is that part of the cell material not sedimented by a centrifugal force known to sediment any subcellular structure
C. A BLENDER consist of a glass vessel fitted with rotating knives
D. None of the above
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A gene that does not contain introns has an Eco RI site just down stream of the translational termination codon in the 3' untranslated region. The size of the gene is 4 Kbp. The length of 3' UTR is 2 Kbp, the 5' UTR is 1 Kbp and that the open reading frame is 1kbp. Upon probing a southern blot of an Eco RI digested genomic DNA with the radioactively labelled fragment containing only the open reading frame, the size of the band detected by hybridization would be
A. 1 Kbp
B. > 2 Kbp
C. 0.5 Kbp
D. 1.5 Kbp
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Cells deficient in hypoxanthine guanine phospho-ribosyl transferase (HGPRT)
A. Synthesis of purine deoxynucleotides by salvage pathway
B. Synthesis of purine deoxynucleotides by de novo path way
C. Supply of hypoxanthine in the culture medium
D. Supply of thymidine in the culture medium enzyme rely on
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Which of the following statements gives a correct explanation for the use of vectors containing drug resistance genes in the cloning of recombinant DNA (cDNA) molecules?
A. The products of the drug resistance genes protect the cDNA from destruction by the host cells
B. The drug resistance genes provide additional base sequences that enable the vector to accommodate larger inserts of cDNA
C. Entry of the vector containing the cDNA and the drug resistance genes into the host cell renders the latter identifiable as it is now resistant to antibiotic drugs
D. The cloned cDNA imparts drug resistance upon any cellular system with which it is used
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There are two different ways of determining the nucleotide sequence of a nucleic acid: the chemical quencing (Maxam-Gilbert) method and the enzymatic sequencing (Sanger) method. The basic principle/advantage of the Sanger method is
A. The differential interaction of the bases with particular dyes
B. Extension of a synthetic primer and reliable termination of DNA repair synthesis
C. The correlation of restriction sites with the end-label of the DNA
D. The ability to 'sequence' both strands of the DNA duplex simultaneously
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The ability to clone an adult animal from the nucleus of a differentiated somatic cell proves that
A. The germ line and soma are identical
B. Genetic engineering is a powerful technique
C. Animals are not all that different from plants
D. The nuclei of somatic cells contain all the genetic information present in a fertilized egg
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For protoplast fusion to be successful in plant cells.
A. Fusion agents other than polyethylene glycol should be used
B. Cell wall of the two strains of cells should not be damaged
C. DNA between the two cells should be compatible
D. Osmolarity of the medium is not important
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The process used for separation of protein in polyacrylamide gel is called:
A. Southern blotting
B. Northern blotting
C. Western blotting
D. Eastern blotting
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The technique which involves addition or deletions of genes is
A. Gene therapy
B. Genetic engineering
C. Gene splicing
D. Artificial synthesis
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In Southern blotting, DNA is fixed on
A. Nitrocellulose
B. Nylon membrane
C. A and B both
D. None of these
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