1.             From the list below identify (X) the worlds top 5 crops in terms of dry matter produced.  (bonus 1pt - rank them in order).  5pts

        

         corn ___        wheat ___       cassava ___       potato ___       barley ___       sorghum ___

         cane sugar ___            rice ___            soybean ___            oat___           

 

2.      Associate the statements below with their appropriate class by inserting a D for dicot or an M for monocot.  4 pts

 

         ____Higher protein and oil                                ____Coleoptile emerges

         ____C3 and C4 photosynthesis                   ____Biological N fixation in some

 

3.             Which of the major plant families contain the top three world food plants? (circle letter of correct answer). 3pts

 

         a. Legume    b. Dicot    c. Grass   d. Tuber    e. Monocot

 

4.      The amino acids in proteins are of two types, essential and non essential.  Circle the letter of the statement below which is false regarding these types of amino acids. 2 pts

 

         a.  The amino acid composition of meat is generally balanced

         b.  Humans can synthesize essential amino acids

         c.  Milk is well balanced in amino acid composition

d.   A combination of proteins from grasses and legumes can provide a balance of amino acids

         e.  Most plant proteins contain unbalanced amounts of amino acids 

 

5.      Fatty acids are important energy storage compounds in  plant seeds.  Circle the letter of the statement below which is false regarding fatty acids. 3 pts

 

         a.  The most common plant fatty acids are 18 carbons in length.

         b.  Amount of unsaturation in 18C fatty acids may be mono, di, or tri.

         c.  Partial hydrogenation reduces the tendency of oils to become rancid.

         d.  Partial hydrogenation raises the melting point of fatty acids.

         e.  Partial hydrogenation increases the number of unsaturated bonds in a fatty acid.

 

6.      Circle the letter of the statement below which is false regarding proteins and amino acids. 2 pts

a.  Amino acids contain an amine and a carboxyl group.

b.    Proteins are long chains of amino acids linked together.

c.    These chains of amino acids form a b helix.

d.    Most nitrogen in plants is found in proteins.

7.             The essential amino acid that is often deficient in grasses is: 2 pts

a.  Lysine

         b.  Proline

         c.  Cystine

         d.  Valine

         e.  Argenine