20. (3 pts) W e can measure the rate of reaction for some dehydrogenases by meas
ID: 256584 • Letter: 2
Question
20. (3 pts) W e can measure the rate of reaction for some dehydrogenases by measuring changes in the absorbance of the reaction mixture at 340nm in a spectrophotometer What molecule is changing in absorbance in this reaction? Circle the correct choice NAD pyruvate glucose amino acids (2 pts) People with lactose intolerance are unable to fully digest the lactose in milk. The usual cause is insufficient expression of the enzyme that cleaves the disaccharide in thee intestines. Which enzyme is needed to cleave lactose so that the products of the reaction can enter glycolysis? Circle the correct choice lactase hexokinase phosphohexose isomerase glycogen phosphorylase 21.Explanation / Answer
20 - NAD+is the correct answer.
NAD+ has the absorbance maxima at 340 nm so we can observe change in absorbance.
21) Lactase is the correct answer.
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