Question

define adapter molecule_?​

Answer 1

Answer:

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define adàpter molecule_?

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t RNA- The Adàpter Molecule

The existence of t RNA was postulated by Francis Crick. It was also known as soluble RNA (SRNA) before the genetic côde was postulated. These constitute about 15% of the total cellular RNA.

Criîck postulated the presence of an adàpter molecule that would on one hand read the côde and on other hand would bind to specific amino acid. It acts as intermediate molecule between triplet côde of mRNA and aming acid sequence of polypeptide chain. All tRNA's have almost same basic structure. There are over 50 types tRNA. The three-dimensional structure of the tRNA was proposed to be inverted L-shaped (by Kïm and Klúg) This is the actual structure of tRNA. The secondary structure of tRNA has been depiçted that it looks like a clover-leaf. All tRNA molecules have a guanine residue at its 5' terminal and. At its 3' end, unpaired-CCA sequence is present. Amino acid gets attached at this end only tRNAs are specific for each amino acid For initiation,

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there is another specific tRNA that is known as initiator tRNA. There are no tRNAs for stop codons

Answer 2

Answer:

It is just natural that the term "adaptor" has been applied to concepts in biochemistry. You can't connect an amino acid to the RNA template directly. The two incompatible systems are thus RNA and the amino acid. The tRNA solves this problem. It is also not the only case where this term is used in biochemistry.

Explanation:

It is therefore a natural hypothesis that the amino acid is carried to the template by an ‘adaptor’ molecule, and that the adaptor is the part which actually fits on to the RNA.

Examples:

Examples include the signal transducing adaptor proteins or the vesicular transport adaptor proteins such as adaptin, that establishes a connection between the clathrin molecule and the cargo receptors during vesicle formation.

More to know:

the amino acids into a growing polypeptide. Subsequently these adaptors were identified and are now known as the tRNA molecules. From the nucleotide sequences of numerous tRNA molecules, the secondary structure of the tRNA, the classic cloverleaf, has been identified.

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