Question

Which of the following amino acids is essential in human diet?

• A. Alanine
• B. Glycine
• C. Valine
• D. Glutamic acid

Hint:

Remember: Essential amino acids include Valine, Leucine, Isoleucine, Lysine, Methionine, Threonine, Tryptophan, Histidine, and Phenylalanine.

Answer 1

The Correct Option is C

The question asks us to identify which of the given amino acids is essential in the human diet. Let's analyze the options provided:

1. Alanine: Alanine is a non-essential amino acid, meaning that it can be synthesized by the human body and is not required to be obtained directly from the diet.
2. Glycine: Like alanine, glycine is also a non-essential amino acid. The human body can produce it internally, so it does not need to be consumed through diet.
3. Valine: Valine is categorized as an essential amino acid. This means that it cannot be synthesized by the human body and must be obtained through dietary sources. It plays a crucial role in stimulating muscle growth and regeneration, as well as being involved in energy production.
4. Glutamic acid: Glutamic acid is a non-essential amino acid. It is readily synthesized in the body, hence not required in the diet as an essential nutrient.

Based on the above analysis, the correct answer is Valine as it is the only essential amino acid among the options. Essential amino acids are critical for various bodily functions, including muscle repair and energy production, and must be consumed through protein-rich foods such as meat, dairy products, eggs, and legumes.

Thus, the correct option for the question is Valine.

Answer 2

Step 1: Understanding essential amino acids.
Essential amino acids are those amino acids which cannot be synthesized by the human body in sufficient amounts. Therefore, they must be obtained directly from the diet through food sources such as proteins.
Step 2: Classification of the given options.
(A) Alanine: Alanine is a non-essential amino acid because it can be synthesized in the human body.
(B) Glycine: Glycine is also a non-essential amino acid as it is produced by the body.
(C) Valine: Valine is an essential amino acid. It cannot be synthesized by humans and must be obtained from dietary proteins.
(D) Glutamic acid: Glutamic acid is a non-essential amino acid synthesized in the body.
Step 3: Conclusion.
Among the given options, only Valine is an essential amino acid required in the human diet.