Multiple Choice and/or True-False Review Questions

(Circle the single best answer for each question.)

  1.       The major source of energy in most livestock and poultry rations is provided by:

            A.  fats             B.  carbohydrates        C.  proteins

  2.       Carbohydrates and fats both contain the elements, carbon, hydrogen, and oxygen.  One major difference is that the fat molecule contains a ________ proportion of oxygen to hydrogen.        

A.  higher        B.  lower        

  3.       One example of a monosaccharide is:

            A.  starch         B.  maltose                  C.  glucose.

  4.       Maltose is composed of two molecules of:

            A.  glucose and glucose.

            B.  glucose and fructose.

            C.  glucose and galactose.

  5.       Which of the following can be digested by ruminants but not digested by monogastric animals?

            A.  starch         B.  cellulose                C.  nitrogen-free extract

  6.       A true fat provides a more concentrated amount of energy as compared to carbohydrates, and also provides some of the essential amino acids.

            A.  True           B.  False

  7.       Which tends to be more reactive in storage?

            A.  fats that contain largely saturated fatty acids.

            B.  fats that contain largely unsaturated fatty acids.

  8.       Chemically, all proteins are organic compounds composed of carbon, hydrogen, oxygen and about:

            A.  2.25% N    B.  4.00% N                C.  9.00% N                D.  16.00% N

  9.       Although amino acids are classified as “essential” or “nonessential”, all are needed physiologically for body functions.

            A.  True           B.  False

10.       Which of the following is not classified as an essential amino acid?

            A.  alanine       B.  methionine             C.  lysine                     D.  leucine

11.       Body composition of water is lower in the newborn animal than at maturity, or when finished for slaughter.

            A.  True           B.  False

12.       The amount of water needed by an animal is directly related to the amount of feed dry matter consumed.

            A.  True           B.  False

13.       Which would not be a general role of minerals in body function?

            A.  serves a structural role

            B.  provides energy

            C.  involved in certain body processes (e.g., chemical reactions)

            D.  serves as integral parts of key body substances

14.       An example of a trace or micro-mineral is:

            A.  potassium                         B.  sodium       C.  magnesium D.  selenium

15.       Some minerals are toxic to animals when consumed in small amounts.  An example is:

            A.  magnesium             B.  fluorine      C.  chlorine                 D.  iron

16.       Carotene in feeds is a precursor for:

            A.  Vitamin A              B.  Vitamin D              C.  Vitamin E               D.  Vitamin K

17.       Which are stored in the body when provided in excesses above daily requirements?

            A.  fat-soluble vitamins                       B.  water-soluble vitamins

18.       Some specific vitamins and minerals work together to provide normal body function.  For example, selenium in combination with Vitamin E helps to prevent:

            A.  rickets

            B.  anemia

            C.  “stiff lambs disease”

            D.  increased blood clotting time

19.       An energy feed is classified as one with:

            A.  more than 18% crude fiber and more than 20% crude protein

            B.  more than 18% crude fiber and less than 20% crude protein

            C.  less than 18% crude fiber and less than 20% crude protein

            D.  less than 18% crude fiber and more than 20% crude protein

20.       Select the feedstuff that is not classified as a protein supplement.

            A.  barley        B.  soybean meal         C.  cottonseed meal                 D.  linseed meal