Answer Key of BHU PET Applied Microbiology 2012 (Part 3)

Q1. Viriods are:
(1) Smalt circular RNA molecules, associated with larger RNA molecules
(2) Small subunits of viral coat
(3) Hollow virus particles without nucleic acids
(4) Nucleic acid without viral coat
Q2. Discovery of Viroid is credited to :
(1) Prusiner
(2) Diener
(3) Ivanowsky
Q3. Which of the following requires cholesterol for growth?
(1) Actinomycetes
(2) Mycoplasma
(3) PPLO
(4) Chlorophyceae
Q4. Specialized Transduction is an example of :
(1) Recombination
(2) Vertical Gene Transfer
(3) Horizontal Gene Transfer
(4) Crossing over
Q5. Domain System is devised on the basis of :
(1) Numerical Taxonomy and Percentage Similarity
(2) DNA homology experiments involving Hetcroduplcxcs
(3) Electron microscopic analyses of Ultramicroscopic structures
(4) Molecular-level genetic analyses of 16S.r.RNA
Q6. In which of the following D amino acids are most likely to be found?
(1) Homo sapiens
(2) Microcystis
(3) Escherichia coli
(4) Oscillatoria
Q7. Which of the following belongs to Archaebacteria?
(1) Cyanobacteria
(2) Agrobacterium
(3) Methanogens
(4) Chlorophyceae
Q8. Saccharomyces cerevisiae is employed for the production of :
(1) Idli
(2) Beer
(3) Bread
(4) All of the above
Q9. Torulopsis utilis is :
(1) Food yeast
(2) Intestinal commensal
(3) Microorganism that yields third-generation vaccines
(4) Employed for synthesis of citric acid
Q10. Heating milks and wines to 66°C for a brief period and then sudden cooling is :
(1) Pasteurization
(2) Sterilization
(3) Fermentation
(4) Preservation
Q11. Milk is changed into curd by :
(1) Acetobacter aceti
(3) Kilnthomonas citri
(2) Bacillus megaterium
(4) None of the above
Q12. Pasteurization frees the foodstuff from:
(1) All living bacteria
(2) All living organisms
(3) All vegetative forms of bacteria
(4) Vegetative forms of all pathogenic bacteria
Q13. Curd, milk, cheese and butter are produced with the use of :
(1) Yeast
(2) Penicillin
(3) Streptococcus
(4) None of the above
Q14. Vinegar is prepared from alcohol with the help of :
(1) Lactobacillus
(2) Acetobacter
(3) Azotobacter
(4) None of the above
Q15. Rennin employed in the cheese industry is :
(1) Inhibitor
(2) Alkaloid
(3) Enzyme
(4) Activator
Q16. Distribution of clean and quality milk throughout the world has been made possible as a result of the work of :
(1) Leeuwenhoek
(2) Koch
(3) Pasteur
(4) Blackman
Q17. Which compound is added to the medium to absorb oxygen for the creation of anaerobic conditions?
(1) Sodiumthioglycollate
(2) Nitrous acid
(3) Citrate
(4) None of the above
Q18. The Watson-Crick structure of DNA is referred to as;
(1) A-DNA
(2) B-DNA
(3) C-DNA
(4) Z-DNA
Q19. Which of the following has clove leaf-like structure?
(1) mRNA
(2) tRNA
(3) rRNA
(4) DNA
Q20. Mutation theory of evolution is proposed by:
(1) Hugo de Varies
(2) Darwin
(3) Lamarck
(4) Mendel
Q21. Transposes are also called as :
(1) Walking chromosomes
(3) Jumping genes
(2) Running chromosomes
(4) None of the above
Q22. Who among the following is related to transposons?
(1) McClintock
(2) Hershey and Chase
(3) Jacob and Mono
(4) Ramakrishnan
Q23. The enzymes that helps in RNA primer formation is :
(1) DNA polymerase I
(2) DNA polymerase II
(3) DNA polymerase III
(4) DNA primase
Q24. Reverse transcriptase is a :
(1) DNA dependent RNA polymerase
(2) RNA dependent polymerase
(3) Both (1) and (2)
(4) Neither (1) nor (2)
Q25. Which of the following enzymes helps in the uncoiling of DNA?
(1) DNA primase
(2) Ligase
(3) Helicase
(4) Lyase
Q26. pBR322 is a:
(1) Bacteriophage
(2) Bacteria
(3) Virus
(4) Plasmid
Q27. Which of the following is called Nature’s Genetic Engineer?
(1) Agrobacterium tumefaciens
(2) RNA virus
(3) $x174
(4) NV
Q28. Western blotting is related to :
(1) DNA
(2) RNA
(3) Proteins
(4) Fats
Q29. DNA polymerase is involved in:
(1) Replication
(2) Transcription
(3) DNA repair
(4) Translation
Q30. Mutation is a:
(1) Defect in DNA strand
(3) Repetitive DNA sequence
(2) Alteration in DNA strand
(4) Single-stranded RNA
Q31. DNA generally acts as a template of:
(1) Only protein
(3) Only RNA
(2) Only DNA
(4) Both DNA and RNA
Q32. Artificial synthesis of DNA in the laboratory was first achieved by :
(1) Kornberg & Ochoa
(2) Khorana
(3) Altman
(4) Nirenberg & Mathie
Q33. The DNA probe, 3’GGCTTA will hybridises with DNA containing:
(1) 5’CCGUUA
(2) 3’CCGAAT
(3) 5’CCGAAT
(4) 3’GGCAAU
Answer Key of BHU PET Applied Microbiology 2012 (Part 3)
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