Which linkage best describes the covalent bond between an amino acid (AA)and its cognate tRNA?
A)amino group of AA linked to 5' -OH of tRNA
B)amino group of AA linked to 5' phosphate of tRNA
C)carboxyl group of AA linked to 3' -OH of tRNA
D)carboxyl group of AA linked to 3' phosphate of tRNA
E)none of the above

Question

Quizplus · Accepted Answer

Amino acids are linked to their cognate tRNAs through an ester bond between the carboxyl group of the amino acid and the 3' -OH group of the tRNA. This linkage is called an aminoacyl bond, also known as an ester bond. Therefore, choice C, carboxyl group of AA linked to 3' -OH of tRNA, is the correct linkage that best describes the covalent bond between an amino acid and its cognate tRNA. Choices A, B, and D are incorrect because they do not describe the correct linkage between the amino acid and tRNA.

Which Linkage Best Describes the Covalent Bond Between an Amino