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

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