In the tRNA diagram, the region where amino acid attaches is:
Correct answer: B. Acceptor stem (3′ end)
- A. Anticodon loop
- B. Acceptor stem (3′ end)
- C. D‑loop
- D. Variable arm
Explanation
The 3' end of tRNA always ends with the sequence CCA, where the amino acid binds. This bond is formed by the enzyme aminoacyl-tRNA synthetase. It's the "charging site" that loads the correct amino acid before translation begins.
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Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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