Ribose is a pentose, a simple sugar (monosaccharide) that has five carbon
atoms per molecule. It is synthesized in the body and obtained in small
amounts from consumption of ripe fruits and vegetables. Ribose serves as
an energy substrate for the resynthesis of ATP and is a key component of
ribonucleic acid (RNA). Deoxyribose, a component of DNA, also is a
pentose.
The optimum pH of pepsin is:
1. 5
2. 7.1
3. 8.1
4. 2 - ✔✔4
The optimum pH for enzymes varies for different enzymes and even
enzymes with similar actions may have different optimal pH based on
where they act. For example, trypsin, a digestive enzyme that acts in the
small intestine has an optimal pH of 8 while pepsin, which acts in the more
acidic milieu of the stomach, has an optimal pH of 2.
A catabolic enzyme:
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