Understanding Enzymes and Their Activity

The graphs show the reaction rate for an enzyme across a range of temperatures and pH. Based on the data, this enzyme functions best at what temperature and pH?

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9C The graphs show the reaction rate for an enzyme across a range of temperatures and pH.

Based on these data, this enzyme functions best at what temperature and pH?

• Temperature of 27°C and a pH of 4

• Temperature of 37°C and a pH of 6

• Temperature of 40°C and a pH of 8

• Temperature of 50°C and a pH of 10

What is structure A?

• Substrate

• Active site

• Enzyme

• Products

What is structure D?

• Substrate

• Active site

• Enzyme

• Products

What is structure C?

• Substrate

• Active site

• Enzyme

• Products

What is the primary role of enzymes in biological systems?

• To provide energy for reactions

• To speed up chemical reactions

• To act as structural components

• To store genetic information

Which part of the enzyme is responsible for its specificity?

• The active site

• The substrate

• The enzyme-substrate complex

• The allosteric site

How does temperature generally affect enzyme activity?

• Enzyme activity decreases with increasing temperature

• Enzyme activity is unaffected by temperature

• Enzyme activity increases with increasing temperature up to a point

• Enzyme activity is highest at freezing temperatures

What happens to an enzyme when it is denatured?

• It becomes more active

• It loses its specific shape

• It binds more substrates

• It becomes a different enzyme

Which of the following factors does NOT affect enzyme activity?

• pH level

• Substrate concentration

• Enzyme concentration

• Color of the enzyme