BIOMOLECULES AND ENZYMES

Detailed explanation-1: -anticodon – a sequence of three nucleotides on a tRNA molecule that bond to a complementary sequence on an mRNA molecule. The anticodon sequence determines the amino acid that the tRNA carries.

Detailed explanation-2: -The three-letter nature of codons means that the four nucleotides found in mRNA-A, U, G, and C-can produce a total of 64 different combinations. Of these 64 codons, 61 represent amino acids, and the remaining three represent stop signals, which trigger the end of protein synthesis.

Detailed explanation-3: -The tRNA anticodon 3-UAC-5 will pair with the mRNA codon.

Detailed explanation-4: -With RNA, the nucleotide base adenine always pairs with uracil (A and U), and guanine always pairs with cytosine (G and C). Some other codon and anticodon examples are: Methionine: the mRNA codon is AUG, and the tRNA anticodon is UAC. Lysine: the mRNA codon is AAG and the tRNA anticodon is UUC.

Detailed explanation-5: -The 3’ end has CCA sequence. Attachment of an amino acid to the 3’ adenosine yields an aminoacyl-tRNA and therefore the CCA site is called amino acid binding site; option D is correct.