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DNA, RNA, and PROTEINS Worksheet Multiple choice: _____1.The three bases on the tRNA molecule that are complementary to one of the mRNA codons are called the___________________. A. message matches B. anticodon C. promoter D. exon _____2.Which nucleotide is always paired with Adenine in a DNA MOLECULE? A. Adenine B. Thymine C. Guanine D. Cytosine

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Answer: 1) B. anticodon

2) B. Thymine

Explanation: An anticodon is a three base sequence on the transfer RNA (tRNA) by which the tRNA base pairs with mRNA codons. A codon is a triplet of nucleotides that codes for a specific amino acid. Three nucleotide residues on the mRNA are required to encode each amino acid.

During protein synthesis, tRNA which is an adaptor molecule binds a specific amino acid with one part of the adaptor and binds the nucleotide sequence on the mRNA that encode an amino acid with another part of the adaptor.

In DNA base pairing, adenine pairs with thymine while guanine pairs with cytosine that is A=T, G=C.

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