Proteins are large biological molecules consist of which of the following amino acids?: D-α-amino acids|D-β-amino acids|L- and D-β-amino acids|L-α-amino acids|L-β-amino acids

The final products of digestion are ? A: fatty acids, starch, glucose B: protein, amino acids, glucose C: protein, fat, carbohydrate D: glucose, amino acids, fatty acids

The acetyl CoA required for the synthesis of fatty acids is derive from ( ). A: fat mobilization B: β-oxidation of fatty acids C: degradation of amino acids D: glycolysis E: degradation of glucoses

When a protein is completely hydrolyzed will the further analyse: ( ) A: Only detect amino acids in S conformation B: Often detect other molecules besides amino acids C: Never detect more than 20 standard amino acids D: Never detect fewer than 20 standard amino acids E: Only detect the 20 standard amino acids

Which of the following amino acids doesn’t belong to essential amino acids?? Methionine|Isoleucine|Valine|Cysteine

Which is not essential amino acids? ( )

The covalent bond between two adjacent amino acids in a protein chain is called a ___________; the chain of amino acids is also known as a polypeptide.

The average molecular weight of oil can be reflected by measuring ( ) A: Saponification value B: Peroxide value C: Free fatty acids D: Trans fatty acids

The main fatty acids that elevated blood cholesterol levels are：

Only protein contains amino acids in living organism.