TLS Online TPP Program

#Question id: 764


Which of the following is NOT correct about tRNA?

#XL - Q Biochemistry
  1. Charging tRNAs with amino acids is mediated by aminoacyl-tRNA synthetases.

  2. tRNA contains a three-nucleotide sequence known as an anticodon.

  3. Some tRNAs can bind to more than one codon due to wobble base pairing in the second base of the codon.

  4. The match between tRNA anticodon and the mRNA codon ensures the fidelity of translation.

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TLS Online TPP Program

#Question id: 403

#XL - S Microbiology

For the reaction A -> B, DG'° = –60 kJ/mol.  The reaction is started with 10 mmol of A; no B is initially present.  After 24 hours, analysis reveals the presence of 2 mmol of B, 8 mmol of A. Which is the most likely explanation?

TLS Online TPP Program

#Question id: 404

#XL - S Microbiology

When a mixture of 3-phosphoglycerate and 2-phosphoglycerate is incubated at 25 °C with phosphoglycerate mutase until equilibrium is reached, the final mixture contains six times as much 2-phosphoglycerate as 3-phosphoglycerate.  Which one of the following statements is most nearly correct, when applied to the reaction as written?  (R = 8.315 J/mol·K; T = 298 K)  3-Phosphoglycerate -> 2-phosphoglycerate

TLS Online TPP Program

#Question id: 407

#XL - S Microbiology

The reaction A + B -> C has a DG'° of –20 kJ/mol at 25° C.  Starting under standard conditions, one can predict that:

TLS Online TPP Program

#Question id: 407

#XL - Q Biochemistry

The reaction A + B -> C has a DG'° of –20 kJ/mol at 25° C.  Starting under standard conditions, one can predict that:

TLS Online TPP Program

#Question id: 408

#XL - S Microbiology

Which of the following compounds has the largest negative value for the standard free-energy change (DG'°) upon hydrolysis?

TLS Online TPP Program

#Question id: 408

#XL - Q Biochemistry

Which of the following compounds has the largest negative value for the standard free-energy change (DG'°) upon hydrolysis?