No, the optimum pH for an enzyme depends on the environment in which it normally works. Your stomach is an acidic environment which contains an enzyme called pepsin. This not only works better in acid environments but actually denatures (that is, totally stops working) if the pH rises above 5.0.
This is not true. Different enzymes thrive in completely different pH conditions. Consider the protease pepsin, which works in the stomach. It breaks down proteins in acidities as low as pH 2. In the duodenum, lipase works best in slightly alkaline conditions.
Enzymes typically work best within a specific pH range, which varies depending on the specific enzyme. However, enzymes usually do not work well or at all in extremely acidic or basic conditions. This is because the structure and function of enzymes can be denatured or altered in pH environments that are too far from their optimal range.
Enzymes have an optimal temperature at which they work best, usually around body temperature for human enzymes. Extreme temperatures can denature the enzyme, causing it to lose its shape and function. Some enzymes from extremophiles are adapted to work at very high or low temperatures.
The scientist who proved that not all enzymes are proteins was Leonor Michaelis and Maud Menten in 1913. Their work on enzyme kinetics showed that enzymes can also be composed of RNA molecules, known as ribozymes. This discovery challenged the prevailing notion at the time that all enzymes were proteins.
No, not all proteins are enzymes. Enzymes are a type of protein that catalyze specific biochemical reactions. While many enzymes are proteins, there are also non-enzymatic proteins that serve structural, regulatory, or transport functions in the body.
This is not true. Different enzymes thrive in completely different pH conditions. Consider the protease pepsin, which works in the stomach. It breaks down proteins in acidities as low as pH 2. In the duodenum, lipase works best in slightly alkaline conditions.
All enzymes work best at a certain temperature and pH. They also need a substrate to work on. A change in pH or temperature will inactive it by denaturing it. If the substrate is very low in quantity or is absent, the enzyme will be inactive.
Enzymes typically work best within a specific pH range, which varies depending on the specific enzyme. However, enzymes usually do not work well or at all in extremely acidic or basic conditions. This is because the structure and function of enzymes can be denatured or altered in pH environments that are too far from their optimal range.
Enzymes have an optimal temperature at which they work best, usually around body temperature for human enzymes. Extreme temperatures can denature the enzyme, causing it to lose its shape and function. Some enzymes from extremophiles are adapted to work at very high or low temperatures.
An enzyme's optimum pH is the pH (that is, degree of acidity of alkalinity) that the enzyme catalyses reactions fastest at. If the pH varies too much from the optimum, the enzyme becomes denatured and cannot catalyse reactions any more.
Enzymes work by reducing the energy of activation.
Far from it. Most enzymes only work well in a characteristic, rather narrow range of temperatures.
Enzymes are proteins, but as you can imagine, different parts of the body need different types of enzymes to work efficiently. Can you imagine the enzymes which break down food in the process of digestion being replaced by the enzymes which assist respiration or photosynthesis? It wouldn't work. Each type of enzyme controls different chemical processes.
takes place in the mouth
The scientist who proved that not all enzymes are proteins was Leonor Michaelis and Maud Menten in 1913. Their work on enzyme kinetics showed that enzymes can also be composed of RNA molecules, known as ribozymes. This discovery challenged the prevailing notion at the time that all enzymes were proteins.
but all catalysts aren't enzymes...
Yes, almost all work on a single substrate.