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MCQs

Total Questions : 232 | Page 19 of 24 pages
Question 181. Introduction of DNA molecules into the recipient organism is termed as ____________
  1.    transformation
  2.    translation
  3.    transduction
  4.    transcription
 Discuss Question
Answer: Option A. -> transformation
Answer: (a).transformation
Question 182. Many bacterial species are having a natural ability to take up the exogenous DNA material. Which of the statement is not correct in regard to it?
  1.    This ability is termed as competence
  2.    It is not limited to particular growth phases
  3.    The bacteria may develop new biochemical abilities under special conditions such as nutrient deprivation
  4.    Induction of specific set of bacterial proteins may take place
 Discuss Question
Answer: Option B. -> It is not limited to particular growth phases
Answer: (b).It is not limited to particular growth phases
Question 183. The charge present on the DNA backbone is negative. The force required to accelerate the molecules towards anode is directly proportional to the number of ____________
  1.    sugar molecules
  2.    nitrogenous bases
  3.    phosphate groups
  4.    both phosphate group and sugar molecules
 Discuss Question
Answer: Option C. -> phosphate groups
Answer: (c).phosphate groups
Question 184. Another method of DNA recovery is termed as freeze-squeeze. The correct statement for it is?
  1.    The slice containing DNA is cut and frozen into liquid oxygen
  2.    Freezing doesn’t have any effect on the DNA structure
  3.    After freezing centrifugation is carried out through glass wool plug
  4.    The substance used for centrifugation allows the gel to pass through but the liquid is retained
 Discuss Question
Answer: Option C. -> After freezing centrifugation is carried out through glass wool plug
Answer: (c).After freezing centrifugation is carried out through glass wool plug
Question 185. If further electrophoresis is used for recovery of DNA from gels, the method is termed as ____________
  1.    secondary electrophoresis
  2.    recovery electrophoresis
  3.    denaturing electrophoresis
  4.    electro-elution
 Discuss Question
Answer: Option D. -> electro-elution
Answer: (d).electro-elution
Question 186. A piece of DNA that is to be separated is crushed and soaked into the buffer. The majority of DNA diffuses, how can it be separated?
  1.    Filtration and centrifugation
  2.    Filtration or centrifugation
  3.    Allowing to sediment
  4.    By passing through a silica column
 Discuss Question
Answer: Option B. -> Filtration or centrifugation
Answer: (b).Filtration or centrifugation
Question 187. Force is defined as mass per unit acceleration. As the number of phosphate molecules increases, the charge also increases which increases the force required. The acceleration is dependent on the size of the molecules.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 188. A mechanism through which new genetic material is generated during molecular evolution is called
  1.    gene duplication
  2.    gene amplification
  3.    gene cloning
  4.    all of above
 Discuss Question
Answer: Option A. -> gene duplication
Answer: (a).gene duplication
Question 189. The amplification of rRNA genes occurs during the development of
  1.    DNA
  2.    RNA
  3.    ova
  4.    Sperm
 Discuss Question
Answer: Option C. -> ova
Answer: (c).ova
Question 190. Gene amplification usually occurs in
  1.    meiosis
  2.    mitosis
  3.    replication
  4.    transcription
 Discuss Question
Answer: Option A. -> meiosis
Answer: (a).meiosis

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