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35. Which part of the genomic DNA contains the sequence corresponding to the 5′ untranslated region (5′ UTR)? (A) Exon (B) Intron (C) Upstream of the transcription start site (D) […]

34. Identify the statement that is TRUE of operons. (A) Fine regulation of the expression of individual genes are made possible by operons (B)Only genes involved in carbohydrate metabolism are […]

33.  A 152 nm long Watson-Crick double helical DNA (B-DNA) will contain_____turns. How Many Turns Are Present in a 152 nm Long Watson-Crick B-DNA Molecule? Understanding the B-DNA Helical Turn […]

32. Match the entries in Group I with the entries in Group II Group I                         Group II DNA replication  […]

31. In bacteria, a ribosome synthesizes a protein containing 300 amino acids from mRNA in 20 seconds. If the average lifetime of a mRNA is 2 minutes, the number of […]

30. Which of the following is(are) INCORRECT in the regulation of the trp operon? (A) It is an example of a negatively controlled repressible operon (B) The amino acid Trp […]

29. Which of the following is true of protein synthesis ONLY in prokaryotes? (A)Translation and transcription are coupled (B)The codon AUG codes for the start signal (C)The tRNA anticodon can […]

28. Which of the following is NOT involved in eukaryotic translation? (A) Ribosome (B) Spliceosome (C) mRNA (D) tRNA Which Component Is Not Involved in Eukaryotic Translation? Understanding Eukaryotic Translation […]

27. In a double stranded DNA, which of the following ratios is/are always equal to 1? A, T, G and C denote the number of bases. (A) (A+T)/(G+C) (B) (A+G)/(T+C) […]

26. When bacteria are grown in glucose-depleted media containing high concentration of lactose, expression of lac operon genes is activated by (A) the binding of lac repressor in the operator […]