Q. Homologous genes present in different organisms are called

  • (A) Paralog
  • (B) Duplicate genes
  • (C) Ortholog
  • (D) Xenolog
πŸ’¬ Discuss
βœ… Correct Answer: (C) Ortholog

Q. The C-value paradox may be explained by the

  • (A) More number of genes with more complexity
  • (B) Predominance of non-coding DNA
  • (C) Both A and B
  • (D) Non existence of coding regions
πŸ’¬ Discuss
βœ… Correct Answer: (B) Predominance of non-coding DNA

Q. A virus whose RNA genome has a DNA intermediate as part of its replication cycle

  • (A) Retro virus
  • (B) Cauliflower mosaic virus
  • (C) Vaccinia virus
  • (D) Adenovirus
πŸ’¬ Discuss
βœ… Correct Answer: (A) Retro virus

Q. In most bacterial mRNAs, the initiation codon is preceded by a special sequence called

  • (A) 5'-Methylguanosine cap
  • (B) Poly A tail
  • (C) Ribosome binding site
  • (D) A and B both
πŸ’¬ Discuss
βœ… Correct Answer: (C) Ribosome binding site

Q. Proteins transported to nucleus requires

  • (A) Nuclear localization sequences
  • (B) N-terminal transit sequence
  • (C) Transit peptide
  • (D) All of the above
πŸ’¬ Discuss
βœ… Correct Answer: (A) Nuclear localization sequences

Q. In E. coli, if there is no CCA at 3' end tRNA, it will be added by the enzyme

  • (A) tRNA nucleotidyl transferase
  • (B) Transposase
  • (C) Nuclease
  • (D) All of the above
πŸ’¬ Discuss
βœ… Correct Answer: (A) tRNA nucleotidyl transferase

Q. Which one of the following is not directly involved in the process known as translation?

  • (A) Peptidyl transferase
  • (B) Aminoacyl-tRNA synthetases
  • (C) mRNA
  • (D) DNA
πŸ’¬ Discuss
βœ… Correct Answer: (D) DNA

Q. Which of the following statement about eukaryote RNA polymerases is correct?

  • (A) RNA polymerase I (RNA Pol I) is located in the nucleolus and transcribes the 28S, 18S, 5.8S rRNA genes
  • (B) RNA polymerase II (RNA Pol II) is located in the nucleoplasm and transcribes protein coding genes to yield pre-mRNA and also the genes encoding small nuclear RNAs (snRNA) involved in RNA processing
  • (C) RNA polymerase III (RNA Pol III) is located in the nucleoplasm and transcribes genes for tRNA, 5S rRNA, and the 7S rRNA
  • (D) All of the above
πŸ’¬ Discuss
βœ… Correct Answer: (D) All of the above

Q. The 5' upstream of a transcription start contains

  • (A) Poly A tail
  • (B) Promoter
  • (C) Intron
  • (D) Exon
πŸ’¬ Discuss
βœ… Correct Answer: (B) Promoter

Q. Open promoter complex comprises

  • (A) RNA polymerase bound on cis acting element promoter
  • (B) local unwinding of DNA at active genic region
  • (C) Both A and B
  • (D) Proteins started to open up chromatin
πŸ’¬ Discuss
βœ… Correct Answer: (C) Both A and B

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