BI-1564
Mutations
Biology · Secondary 4 · Hard · Mutations
Galactosaemia is caused by a mutation in a gene coding for an enzyme that converts galactose to glucose. Which statement best explains why people with galactosaemia often have high levels of galactose in their blood?
- The mutation causes more galactose to be absorbed from the intestine.
- The mutation changes the enzyme so it cannot bind galactose effectively.
- The mutation increases the rate at which galactose is converted to glycogen.
- The mutation makes the enzyme work at a higher temperature only.
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