Question

cells make proteins from amino acids. some amino acids can be made in our cells by containing carbon, hydrogen, and oxygen from sugar molecules. but 9 of the 20 common amino acids cannot be synthesized in our cells. these 9 essential amino acids can only be obtained by eating protein - rich foods, like animal meat, eggs, fish, nuts, beans, and dairy products. select the true statements. cells make new proteins by combining amino acids. some amino acids can be made with chemical elements from sugars. essential amino acids must be consumed in foods. all amino acids are made in human body cells.

Explanation:

• The first statement is true as the text says "Cells make proteins from amino acids", which implies combining amino acids to make new proteins.
• The second statement is true because it is stated that "Some amino acids can be made in our cells by containing carbon, hydrogen, and oxygen from sugar molecules".
• The third statement is true since "These 9 essential amino acids can only be obtained by eating protein - rich foods".
• The fourth statement is false as 9 out of 20 common amino acids (essential amino acids) cannot be made in human body cells.

Answer:

Cells make new proteins by combining amino acids.
Some amino acids can be made with chemical elements from sugars.
Essential amino acids must be consumed in foods.