It is the sequence of amino acids (including their chemical properties) that determines the structure of the protein and, in turn, the protein properties & protein functions.

A protein polypeptide chain can fold into a coiled alpha-helix and/or a pleated beta-sheet that forms one or more of the following levels of protein structure. 

The pyloric region of pig stomach secretes which one of the following substances that stimulate stomach HCl & pepsinogen secretion and gastric motility?

Cobalt is an integral component of vitamin ______.(A) B1(B) B4(C) B7(D) B9(E) B12

All vitamins are very similar in their molecular structures, so we can easily give a general formula to represent all of them.

Which one of the following amino acids is not an essential amino acid?(A) Lysine(B) Histidine(C) Threonine(D) Glutamine(E) Methionine

During food processing, hydrogenation of a liquid oil could change Trans fatty acids in it to Cis fatty acids. 

To determine the protein quality in a feed or a diet for non-ruminant animals, such as pigs and chickens, the relatively best method of measurements is _________________. (A) True crude protein (CP) digestibility(B) True essential amino acid (AA) digestibilities (C) Apparent crude protein (CP) digestibility (D) Apparent essential amino acid (AA) digestibilities(E) The total amino acid (AA) profile (i.e., compositions)

Which one or two of the following nutrient transporters is or are responsible for small intestinal absorption of glucose? A.  GLUT1 B.  PepT1 C.  CAT1 D.  SGLT1 E.  A and B F.   A and C G.  A and D

Dietary deficiency of which vitamin can cause a cattle eye blind with copious lacrimation?(A) Vitamin A(B) Vitamin K(C) Vitamin E(D) Vitamin D(E) Vitamin B