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TLS Online TPP Program

#Question id: 3786

E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA replication). DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment?

#Section 3: Genetics, Cellular and Molecular Biology

  1. one high-density and one low-density band

  2. one intermediate-density band

  3. one high-density and one intermediate-density band

  4. one low-density and one intermediate-density band

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TLS Online TPP Program

#Question id: 4181

#Section 3: Genetics, Cellular and Molecular Biology

The codon for the amino acid specified by the anticodon at the anticodon arm of tRNA is covalently linked to tRNA at the
TLS Online TPP Program

#Question id: 4182

#Section 3: Genetics, Cellular and Molecular Biology

If the anticodon on tRNA is GTC (tyrosine)(5ʹ → 3ʹ), the sequence of the 5ʹ → 3ʹ template strand of the gene in DNA that specifies this amino acid is
TLS Online TPP Program

#Question id: 4302

#Section 3: Genetics, Cellular and Molecular Biology

Which one of the following proteins is involved in promoter recognition in eukaryotes?
TLS Online TPP Program

#Question id: 4303

#Section 3: Genetics, Cellular and Molecular Biology

Which component is not directly involved in translation?
TLS Online TPP Program

#Question id: 4304

#Section 3: Genetics, Cellular and Molecular Biology

Using codon table, identify a 5′ → 3′ sequence of nucleotides in the DNA template strand for an mRNA coding for the polypeptide sequence Phe-Pro-Lys.
TLS Online TPP Program

#Question id: 4305

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following molecules is a protein produced by a regulatory gene?