In birds, food passes through the proventriculus before entering the gizzard.  

In general, animal cannot synthesize vitamins, but some vitamins such as vitamins K and B12 can be synthesized by animal GI microorganisms.

Hemicellulose is a polysaccharides that contain the following sugar units in its polymer chain. A.   Xylose B.   Arabinose C.   Galactose D.   Only A and B E.   All A, B, and C

The first enzyme that is needed for the first step of TCA cycle is ___________________________.  A. 

Where does the pyruvate dehydrogenase pathway take place?  In mitochondria In cytosol In smooth endoplasmic reticulum In both mitochondria and cytosol In both mitochondria and endoplasmic reticulum

Which one of the following amino acids is a ketogenic amino acid?(A) Leucine(B) Methionine(C) Valine(D) Serine(E) Alanine

How many CO2 molecules are generated from one Krebs cycle? The answer is _____.

C18:3

Salivary glands include the following pairs of glands, all of which have ducts leading the saliva (secreted from the acinar cells) into the mouth.

Proteins are made up of carbon, hydrogen, oxygen and ______. (A) Calcium(B) Sodium(C) Potassium(D) Nitrogen(E) None of these