Final answer:
The statement that complete proteins contain all 9 essential amino acids is true. Foods like meat, fish, and dairy products are examples of complete proteins. Vegans need to combine plant-based proteins to ensure a complete amino acid profile. Option a is correct . It is true.
Step-by-step explanation:
Complete proteins contain all 9 essential amino acids is true. Proteins that contain adequate amounts of all nine essential amino acids are known as complete proteins. These essential amino acids cannot be synthesized by the human body and therefore must be obtained from the diet.
Animal sources like meat, fish, milk, and eggs are considered to have complete proteins because they provide all the essential amino acids in sufficient amounts. In contrast, most plant proteins, such as those found in grains, nuts, and beans, are typically incomplete because they lack one or more of the essential amino acids.
It's important for individuals, such as vegans, who do not consume animal products, to combine different plant protein sources throughout the day to ensure they receive all the essential amino acids. Their diet needs careful planning to avoid amino acid deficiencies, that can lead to health issues.