Question

in order to function efficiently, enzymes need to be at an ideal ph and temperature. different enzymes have different ideal ph and temperature conditions. if the ph or temperature is extreme for a particular enzyme, it can even denature an enzyme, which can prevent it from binding and acting on its substrate. for the following two scenarios, name the variable (temperature or ph) that is affecting the function of the enzyme.
a) atp is produced by cellular respiration in your human body cells. there are a variety of enzymes that work to produce atp, but one of those enzymes is called phosphofructokinase - 1. this enzyme is sensitive to blood acidity. blood can become more acidic if a patient is in respiratory distress.

1. variable affecting enzyme function:

b) a popular lab that can be performed by students is to test the reaction rate of catalase enzyme when it acts on the substrate hydrogen peroxide. catalase has the ability to break down hydrogen peroxide. catalase can be found in beef liver from the grocery store! however, if the beef liver is boiled first, the catalase will not be able to break down hydrogen peroxide.

1. variable affecting enzyme function:

Explanation:

Step1: Analyze scenario A

The enzyme phosphofructokinase - 1 is sensitive to blood acidity. Acidity is related to pH. When blood becomes more acidic in respiratory distress, it's the pH variable affecting the enzyme.

Step2: Analyze scenario B

Boiling the beef liver (where catalase is present) makes the catalase unable to break down hydrogen peroxide. Boiling changes the temperature, and it's the temperature variable affecting the enzyme.

Answer:

1. pH
2. Temperature