1. Consider the following statement and select the correct the number of correct statements.1. The polymerisation of amino acids in form of polypeptide chain according to sequence codon is translation. 2. Translation occurs at ribosome in cytoplasm of cell. 3.Translation uses mRNA that is formed through transcription. 4. Anticodon on tRNA do not play any role in translation. 5. Codon which determines the sequences of amino acids, present on rRNA. A. Four         B. Three C. Five         D. Two Answer:  B Explanation  2.  ..read more

1. Genetic code is three set of nucleotide present on A. DNA        B. mRNA C. tRNA       D.  rRNA Answer: B Explanation  2. Genetic code is  A. Three set of nucleotide present on mRNA. B. Used to transform the information present on mRNA in form of polypeptide chain C. relationship of amino acid sequences in a polypeptide chain and base sequence of DNA. D. All of the above Answer: B Explanation 3. Who of the following gave a proposition by 4 x4 x4 = 64 and stated that there are 64 codon to code 20 amino acids A. George Gamow ..read more

1.In Prokaryotes, Transcription occur in  A. Nucleus    B. Cytoplasm  C. Nucleoid   D. Mesosome  Answer: B Explanation 2.In Prokaryotes and Eukaryotes both, correct sequence of steps involved in transcription. A. Initiation : Elongation : Termination B. Elongation : Initiation : Termination C. Initiation : Termination : Elongation D. Elongation : Termination and Initiation Answer: B Explanation 3.Which of the  following enzyme enters into in to template to bind promoter during the transcription. A. DNA Polymerase  B. Ribo ..read more

1. The flow of genetic information from the DNA to mRNA is called as A. Trans duction B. Transformation  C. Translation  D. Transcription Answer: D Explanation  2.Consider the following sentences give below  and select the number of correct statement.  1. Transcription occur in cytosol or Cytoplasm in Bacteria. 2. Both strands of DNA are participated in process of transcription . 3. Transcription occur in Nucleus  in Eukaryotic. 4. Only one strand of DNA is participated in process of transcription. A. One              B. T ..read more

1. Who of the following proposed the mechanism of central dogma in molecular biology .  A. Fredrick Griffith  B. Wilkins and Franklin  C. Hershey and Chase  D. Francis Crick  Answer: D Explanation  2. Central dogma in molecular biology explain the flow of genetic information from DNA to A. DNA - mRNA - Protein B. Protein -mRNA - DNA C. Protein - DNA - mRNA D. DNA - Protein - mRNA Answer: D Explanation 3. The flow of genetic information from DNA to DNA is called  A. Transduction B. Translation C. Replication  D. Transcription Answer: C  ..read more

1. Who of the following proved that DNA replication is semiconservative in nature.  A. Fredrick Griffith  B. Wilkins and Franklin  C. Hershey and Chase  D.Meselson and stahl Answer: D Explanation  2. DNA replication is semiconservative in nature it means that During replication  A. DNA Helix is half opened. B. One strand of DNA is synthesized into fragment. C. One strand of DNA is old and another strand is newly synthesised. D. None of the above Answer: C Explanation  3. Which of the following statement is not correct about the experiment o ..read more

1. The ultimately proof that DNA is genetic material came from the experiment of  A. Fredrick Griffith  B. Wilkins and Franklin  C. Hershey and Chase  D.Meselson and stahl Answer: C Explanation  2. Hershey and Chase conducted their experiment on bacteriophage which is  A. Virus that infect  bacteria  B.Bacteria that infection virus  C. Bacteria that infect fungi D. Virus that infect  fungi  Answer: A Explanation  3. Hershey and Chase used  which of the two radioactive isotopes in two different culture mediums  t ..read more

1. In which of the following year, Griffith conducted transformation experiment. A. 1928          B. 1930 C. 1925          D. 1940 Answer: A Explanation  2. Griffith used  which of the following bacteria for his   transformation experiment. A. Haemophilia influenzae B. Streptococcus pneumonae C. Proteus vulgaris           D. Salmonella typhi Answer: B Explanation  3.Which of the following statement is not correct about streptococcus pneumonae used by  Griffith for  t ..read more

1 . Which of the following statement is not correct about the packaging of DNA in E.coli. A. DNA is not scattered through out the cell. B. In Prokaryotes, DNA is packed in form of Nucleosome . C. DNA is organised in form of large loop as nucleoid. D. Negative charged DNA is held by the postive charged protein. Answer: B Explanation  2 . In Eukaryotic, DNA is packed in form of  A. Nucleosome  B. Nucleoid C. Nucleolus D. Nucellus Answer: A Explanation 3. In Eukaryotic, Nucleosome is made up of  A. Postively charged Histone octamer ..read more

 1. Consider the following statement and select the correct code: 1.Francis Crick and James Watson proposed the double helix model of DNA. 2.They gave  double helix model of DNA on the basis of X ray diffraction data given by Wilkins and Franklin. A. Only 1  B. Only 2 C. Both 1 and 2 D. Neither 1 nor 2 Answer: C Explanation  2. Which of the following statement is not correct. A. DNA is made up of two Polynucleotide chain. B.Both strands of DNA are coiled in a right handed fashion. C. One turn of DNA helix has 10 base pairs. D. Above features are related to Z DNA ..read more