There need be 9 amino acids, as each amino acid is composed of 3 codons.
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<u><em>Answer:</em></u>
- The correct answer is a.
- The ratio of their masses is always the same
<u><em>Explanation:</em></u>
- Dalton law was based on law of conservation of masses and law of conservation definite proportional. So here , it is cleared that the ratio of their masses should be always same.
Cu(OH)2 is the precipitate that forms