Genetic Recombination(Drug And Pharmaceutical Biotechnology ) Questions and Answers

Question 1. By whose experiment evidence of the existence of conjugation was established?
  1.    Robert Hook
  2.    Albert Einstein
  3.    Thomas Bill and Jimmy Bill
  4.    Joshua Lederberg and Edward Tatum
Explanation:-
Answer: Option D. -> Joshua Lederberg and Edward Tatum
Answer: (d).Joshua Lederberg and Edward Tatum
Question 2. In which phase of growth does the recipient cell take up the donor DNA?
  1.    Lag phase
  2.    Early logarithmic phase
  3.    Late logarithmic phase
  4.    Stationary phase
Explanation:-
Answer: Option C. -> Late logarithmic phase
Answer: (c).Late logarithmic phase
Question 3. Which of the following made it easier to conclude that physical contact of the cells was necessary for conjugation in Davis experiment?
  1.    Filter
  2.    U – tube
  3.    Separate medium for different strains of bacterium
  4.    Distant species of bacterium
Explanation:-
Answer: Option A. -> Filter
Answer: (a).Filter
Question 4. Which one of the following is true?
  1.    The F plasmid encodes the factor which is transferred from one cell to another
  2.    The factor encoded by the F plasmid is called as Filamentous (F) factor
  3.    It is transferred from one cell to another by filament
  4.    The bacteria must belong to the same species to carry out the conjugation
Explanation:-
Answer: Option A. -> The F plasmid encodes the factor which is transferred from one cell to another
Answer: (a).The F plasmid encodes the factor which is transferred from one cell to another
Question 5. By whose experiment conjugation was proved?
  1.    Robert Hook
  2.    Bernard Davis
  3.    Thomas Bill and Jimmy Bill
  4.    Joshua Lederberg and Edward Tatum
Explanation:-
Answer: Option B. -> Bernard Davis
Answer: (b).Bernard Davis
Question 6. In conjugation of F⁺ cell and F⁻ cell the recipient will be F⁻.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
Explanation:-
Answer: Option B. -> False
Answer: (b).False
Question 7. What is the unidirectional transfer of genetic material from the donor to the recipient is termed?
  1.    Conjugation
  2.    Recombination
  3.    Transduction
  4.    Transformation
Explanation:-
Answer: Option A. -> Conjugation
Answer: (a).Conjugation
Question 8. What is the order of the gene where columns are for different HFR and values denote time?
  1.    Azi, Lac, Gal, Ton
  2.    Lac, Gal, Azi, Ton
  3.    Gal, Lac, Ton, Azi
  4.    Tob, Azi, Lac, Gal
Explanation:-
Answer: Option B. -> Lac, Gal, Azi, Ton
Answer: (b).Lac, Gal, Azi, Ton
Question 9. Conjugation between F⁺ and F⁻ cell results in _______________
  1.    Two F⁻ cells
  2.    F⁻ cell becomes F⁺
  3.    F⁻ cell remains F⁻ cell with a little DNA from F⁺ cell
  4.    Remains the same without any change
Explanation:-
Answer: Option B. -> F⁻ cell becomes F⁺
Answer: (b).F⁻ cell becomes F⁺
Question 10. What genetic information (DNA) does an F-plasmid contain?
  1.    Chromosomal DNA
  2.    Non-chromosomal DNA with regulatory genes
  3.    DNA that codes for proteins to produce pili
  4.    both b and c
Explanation:-
Answer: Option D. -> both b and c
Answer: (d).both b and c
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