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What percentage of whey protein is typically found in milk composition?

  1. Less than 1%

  2. 1-2%

  3. 2-3%

  4. 4-5%

The correct answer is: Less than 1%

Whey protein is a significant component of milk, constituting a portion of the total protein content. In the context of milk composition, whey protein typically accounts for about 20% of the total milk protein. Since the total protein in milk averages around 3-5%, this translates to whey protein making up approximately 0.6-1% of the total milk volume. Therefore, the most accurate choice regarding the percentage of whey protein in milk composition is less than 1%, which aligns with the typical understanding of milk's protein makeup. This value emphasizes that while whey protein is a crucial aspect of milk and dairy products, its content is relatively low compared to other components like casein, which constitutes the majority of milk proteins. Additionally, higher percentages suggested by the other options do not accurately reflect the common composition of whey proteins in milk.