Which two features are found on a tRNA molecule as described?

Which two features are found on a tRNA molecule as described?

• A. An anticodon and an amino acid attachment site
• B. A promoter and a terminator
• C. A DNA-binding domain and a catalytic core
• D. An active site and a regulatory region

Answer: (A)

The main idea is understanding tRNA's structure and role in translation. A tRNA molecule carries amino acids to the ribosome and has two key features: an anticodon loop that pairs with the corresponding codon on mRNA, ensuring the correct amino acid is inserted, and an amino acid attachment site at the 3' end (the acceptor stem) where the amino acid is covalently linked by aminoacyl-tRNA synthetases. The anticodon provides the specificity for decoding the genetic code, while the attachment site provides the functional cargo that becomes part of the growing protein. The other options reference elements that are not part of tRNA: promoters and terminators are DNA features involved in transcription; a DNA-binding domain and a catalytic core describe protein domains used in other enzymes; and an active site with a regulatory region are general concepts about enzymes, not specific to tRNA.

The main idea is understanding tRNA's structure and role in translation. A tRNA molecule carries amino acids to the ribosome and has two key features: an anticodon loop that pairs with the corresponding codon on mRNA, ensuring the correct amino acid is inserted, and an amino acid attachment site at the 3' end (the acceptor stem) where the amino acid is covalently linked by aminoacyl-tRNA synthetases. The anticodon provides the specificity for decoding the genetic code, while the attachment site provides the functional cargo that becomes part of the growing protein. The other options reference elements that are not part of tRNA: promoters and terminators are DNA features involved in transcription; a DNA-binding domain and a catalytic core describe protein domains used in other enzymes; and an active site with a regulatory region are general concepts about enzymes, not specific to tRNA.