An average adult human body has approximately 4.7 to 5.5 liters of blood with a pH of _.
Correct answer: D. 7.4
- A. 8.0
- B. 6.0
- C. 5.4
- D. 7.4
Explanation
The normal pH of human blood is tightly maintained within a narrow, slightly alkaline range of 7.35 to 7.45. A pH of 7.4 is the typical average value.
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Proteins are classified by shape, composition and structure, from primary amino acid sequence to secondary, tertiary and quaternary organisation, and their biological roles are linked to this structure. Enzymes are examined as protein biocatalysts, including active sites, substrate specificity, activation energy, cofactors and factors affecting activity.
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