[Campbell Biology P.398] According to Figure 17.17, which event immediately follows the entr... | Practice Question

According to Figure 17.17, which event immediately follows the entry of the amino acid and tRNA into the active site of the synthetase during the formation of a charged tRNA?

  • A: The charged tRNA is released from the synthetase.
  • B: The synthetase catalyzes the covalent bonding of the amino acid to its specific tRNA, using ATP.
  • C: The tRNA anticodon binds to the mRNA codon.
  • D: The amino acid detaches from the tRNA.

Explanation

Figure 17.17 illustrates the three main steps of aminoacyl-tRNA synthesis. Step 1 is the entry of the amino acid and tRNA into the active site. Immediately following this, Step 2 shows the synthetase catalyzing the covalent bonding of the amino acid to its specific tRNA, powered by ATP.