In Wobble hypothesis, true statement regarding variation is
**Core Concept**
The Wobble hypothesis, proposed by Francis Crick, explains the mechanism by which transfer RNA (tRNA) molecules recognize and bind to the codons on messenger RNA (mRNA) during protein synthesis. This hypothesis describes how tRNA molecules can recognize and bind to multiple codons, allowing for the synthesis of proteins with varying amino acid sequences.
**Why the Correct Answer is Right**
The Wobble hypothesis states that the 5' end of the tRNA molecule, specifically the TΨC loop, can form non-standard base pairs with the third nucleotide of the codon. This allows for the recognition of multiple codons by a single tRNA molecule, which is essential for the diversity of amino acid sequences in proteins. The TΨC loop can form wobble base pairs with the third nucleotide of the codon, which is often a purine (A or G) or a pyrimidine (C or U).
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the Wobble hypothesis specifically addresses the recognition of codons by tRNA molecules, not the recognition of amino acids by ribosomes.
**Option B:** This option is incorrect because the Wobble hypothesis does not involve the recognition of codons by amino acids, but rather the recognition of codons by tRNA molecules.
**Option C:** This option is incorrect because the Wobble hypothesis specifically addresses the recognition of codons by tRNA molecules, not the recognition of tRNA molecules by ribosomes.
**Clinical Pearl / High-Yield Fact**
The Wobble hypothesis is essential for understanding the diversity of amino acid sequences in proteins and how tRNA molecules recognize and bind to codons on mRNA. This concept is crucial for understanding the process of protein synthesis and the regulation of gene expression.
**Correct Answer: C. The TΨC loop in the tRNA molecule can form wobble base pairs with the third nucleotide of the codon.**