There are 64 codons and 20 amino acids. Which of the following is true?
There are 64 codons and 20 amino acids. Which of the following is true?
Several different codons can specify the same amino acid.
Each codon specifies a different amino acid.
Some amino acids have no link to a codon.
Each amino acid is specified by only one codon.

1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.