Multiple Choice
In the context of acids and bases, which molecule prevents the lac genes in the DNA of E. coli from being expressed most of the time?
3. Acids and Bases
Acids and Bases
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How does pH affect enzyme-catalyzed reactions?
A
pH has no effect on enzyme activity as enzymes are stable across all pH levels.
B
pH can alter the charge and shape of the enzyme, affecting its activity.
C
Lowering the pH always increases enzyme activity.
D
Enzymes are only active at a neutral pH of 7.
Verified step by step guidance1
Understand that enzymes are proteins that catalyze biochemical reactions, and their activity can be influenced by various factors, including pH.
Recognize that enzymes have an optimal pH range where they function most effectively. This range varies depending on the enzyme and its environment.
Learn that pH affects enzyme activity by altering the ionization state of amino acids in the enzyme's active site, which can change the enzyme's shape and charge distribution.
Realize that extreme pH levels can lead to denaturation of the enzyme, where the enzyme loses its functional shape, thus reducing or eliminating its activity.
Note that while some enzymes are active at neutral pH, others may have optimal activity at acidic or basic pH levels, depending on their biological role and location.
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