AP BIOLOGY

Previous
Next

BIOCHEMISTRY

ENZYMES AND METABOLISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The change in pH value changes the charge ____ of the active site of enzymes and thesubstrate surface. As a result, the enzyme-substratecomplex cannot be formed.* When the pH of the environment returns tothe optimum level, the charge on the activesite will be restored. The enzyme will returnto function as normal.* The extreme change in the pH valuewill break the ____ and change the active site of enzymes
A
ion H+
B
Ion mg+
C
structural chemistry bond
D
structural convalentbond
Explanation: 

Detailed explanation-1: -pH: Each enzyme has an optimum pH range. Changing the pH outside of this range will slow enzyme activity. Extreme pH values can cause enzymes to denature.

Detailed explanation-2: -pH is a major factor affecting the activity of enzymes. The ionization of amino acid molecules and atoms occurs when the pH is altered, thereby affecting the structure and form of proteins and hence disrupting their activities.

Detailed explanation-3: -The Effect of pH on Enzymes The rate of enzymatic reaction depends on pH of the medium. Each enzyme has an optimum pH, where the rate of enzymatic reaction is maximum. At higher or lower pH, the rate of an enzymatic reaction decreases. For most enzymes, the optimum pH lies in the range from pH 5 to pH 9.

There is 1 question to complete.
Previous
Next