Question

An anticodon of sequence 5′ gua 3′ will recognize the codon sequence ________?

1) 5′ uac 3′
2) 3′ uac 5′
3) 5′ cua 3′
4) 3′ cua 5′

Answer 1

The anticodon 5' gua 3' will recognize the codon 5' uac 3' which codes for the amino acid tyrosine.

Step-by-step explanation:

The anticodon of sequence 5′ gua 3′, which is made up of the nucleotides guanine (G), uracil (U), and adenine (A), will recognize the codon sequence 5′ uac 3′.

In this case, the anticodon pairs with the complementary codon during translation. The anticodon sequence 5′ gua 3′ is complementary to the codon sequence 5′ uac 3′, which codes for the amino acid tyrosine.

Answer 2

The anticodon 5′ gua 3′ will recognize the complementary mRNA codon 3′ cau 5′, which is option 4 in the given choices.

Step-by-step explanation:

The anticodon sequence 5′ gua 3′ will recognize the codon sequence 3′ cau 5′. Anticodons on tRNA match with the complementary codon on mRNA using base-pairing rules.

Since G pairs with C and U pairs with A, the correct codon that 5′ gua 3′ would pair with is 5′ uac 3′ read in the opposite direction, which is 3′ cau 5′.

Therefore, the correct answer to the question is option 4) 3′ cau 5′.