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Transfer RNA (tRNA) carries amino acids, matching codons on mRNA with anticodons. mRNA provides the codon sequence, rRNA forms ribosomal structure and catalyzes peptide bond formation, and DNA is not directly used in translation. DAT biology often tests roles of RNA types.

Each cube face is a square bordered by 4 other faces. The only non-adjacent face is the opposite one. Thus, exactly four faces are adjacent. Option B (3) would apply if considering only corner adjacency, but face adjacency means shared edges. On the DAT PAT, quickly recognizing cube spatial relations helps avoid confusion. The cube has 6 faces total: 1 opposite, 4 adjacent.

A cube has 12 edges, 8 vertices, and 6 faces. This standard geometry property is common in DAT PAT cube-counting questions.

On a standard die, opposite pairs are (1,6), (2,5), (3,4). Thus, 4 is opposite 3. Visualization of cube orientation and opposite faces is a common PAT subtest. Memorizing die opposite pairs speeds solving.

In RNA, adenine pairs with uracil, not thymine. Thymine is found in DNA only. Cytosine pairs with guanine. DAT biology tests DNA vs RNA base-pairing differences.