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Short Answer II · Q3

Q.In the figure below, A, B and C are three types of ____________________.

Exercise figure with three structures labelled A, B and C: A is a strand of nucleotides with uracil bases marked, B is a ribosome, and C is a clover-shaped molecule carrying an amino acid at its tip
Figure
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A, B and C are the three types of RNA of protein synthesis: messenger RNA (the uracil-bearing strand), ribosomal RNA (in the ribosome) and transfer RNA (carrying the amino acid).

Reading the figure. The labels the book prints on the drawings are the clues: 'Uracil' on the strand A tells us it is RNA, not DNA, and a long single strand of codons is messenger RNA (mRNA), which carries the encoded message from the gene. B is drawn as two subunits, the ribosome, whose structural framework is ribosomal RNA (rRNA) and which provides the binding site for the mRNA. C is the clover-leaf molecule with an 'Amino acid' attached at its 3' end: transfer RNA (tRNA), the adapter that reads the codon with its anticodon and brings the specific amino acid. …

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