Question: Which of the following is not an essential amino acid?
A Valine
B Lysine
C Histidine
D Glycine
Answer: Glycine
Aspect
| Essential Amino Acids | Non-Essential Amino Acids |
Introduction | · Cannot synthesize by the body. · They must be obtained through the diet. | · Body can synthesize on its own. · They are not required to be obtained through the diet. |
Total no. of amino acids | 9 | 11 |
Examples
| · Leucine · Isoleucine · Valine · Histidine · Lysine · Methionine · Phenylalanine · Threonine · Tryptophan | · Glycine · Alanine · Arginine · Asparagine · Aspartic acid · Cysteine · Glutamic acid · Glutamine · Proline · Serine · Tyrosine |
Food sources | · Beef · Poultry · Fish · Soybeans · Almonds · Eggs · Dairy · Lentils · Nuts
| · Meat · Poultry · Fish · Nuts · Asparagus · Potatoes · Legumes |
Function | · These are building blocks of proteins · These amino acids also support the process of body growth. · They also help to repair body tissues.
| · These are also building blocks of proteins · Involved in various metabolic processes |
Deficiency symptoms | · Poor coordination · Muscle weakness · Difficulty in coordination · Anemia · Poor joint health
| · There is rare chance of deficiency as can be synthesized by the body |