read the following questions and answer in complete sentences. at what concentration does enzyme as activity…

Explanation:

Step1: Understand enzyme - substrate saturation

Enzyme activity levels off when all enzyme - active sites are saturated with substrate.

Step2: Answer the first question about Enzyme A and B leveling - off

The leveling - off of Enzyme A and B is due to substrate saturation. Once all active sites of the enzymes are occupied by substrates, adding more substrate does not increase the reaction rate, thus the activity levels off.

Step3: Predict effect of adding more Enzyme A and B

Adding more of Enzyme A and B would increase the number of available active sites. If there is sufficient substrate, the reaction rate and enzyme activity would increase until a new saturation point is reached.

Step4: Analyze Enzyme C's activity

Enzyme C's activity is steadily increasing with increasing concentration. This indicates that it has not yet reached the saturation point, and there are still available active sites for the substrate to bind to.

Step5: Predict effect of adding more Enzyme C

Adding more of Enzyme C would further increase the number of available active sites. As long as there is substrate available, the reaction rate and enzyme activity would continue to increase until saturation occurs.

Answer:

• The activity of Enzyme A and B levels off due to substrate saturation.
• Adding more of Enzyme A and B would increase activity if substrate is available until a new saturation point.
• Enzyme C's activity is increasing as it has not reached saturation.
• Adding more of Enzyme C would increase activity as long as substrate is available until saturation.