New Mexico NM-ASR Science Grade 8 Practice Questions - New Mexico Assessment Of Science Readiness - Science, Grade 8 Exam

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A mutation occurs in a gene that codes for an enzyme. The mutation changes one amino acid in the enzyme, and the enzyme can no longer speed up its chemical reaction. Which statement best explains this?

The shape of an enzyme determines its function; changing one amino acid can change the enzyme's shape so it no longer works Enzymes do not depend on their shape Changing an amino acid always makes an enzyme work better Mutations affect only the appearance, not the proteins, of an organism

Correct Answer:

The shape of an enzyme determines its function; changing one amino acid can change the enzyme's shape so it no longer works

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