81.  Acetyl CoA  
A.  can enter the electron transport system directly.
B.  is a by product of glycolysis.
C.  might be used in ketogenesis.
D.  is needed to start oxidative deamination.
E.  is converted to pyruvic acid.

82.  The formation of triglycerides is called  
A.  glycogenesis.
B.  lipogenesis.
C.  gluconeogenesis.
D.  ketogenesis.
E.  beta-oxidation.

83.  Fatty acids are catabolized in a process called  
A.  glycolysis.
B.  lipogenesis.
C.  beta oxidation.
D.  gluconeogenesis.
E.  ketogenesis.

84.  The presence of ketone bodies in the urine indicates increased metabolism of  
A.  amino acids.
B.  lactic acids.
C.  fatty acids.
D.  nucleic acids.
E.  citric acids.

85.  Slim N. Trim has been on a low-fat, no carbohydrate diet for two months. Which of the following would you expect to find in large quantities in the urine?  
A.  glucose
B.  lactic acid
C.  pyruvic acid
D.  ketone bodies
E.  proteins

86.  Amino acids can be used as a source of energy  
A.  by converting them into nucleic acids.
B.  by subjecting them to oxidative deamination.
C.  in the process of transamination.
D.  by converting them to ethanol.
E.  and can be stored in the body.

87.  Transamination  
A.  results in free fatty acids.
B.  requires glucose.
C.  can be used to synthesize essential amino acids.
D.  involves removing an amine group from an amino acid.
E.  directly produces urea.

88.  Oxidative deamination is a chemical process in which  
A.  protein is synthesized.
B.  amino acids are buffered in the kidney.
C.  the amine group is removed from an amino acid.
D.  fatty acids are broken down to yield acetyl CoA.
E.  glutamic acid is produced.

89.  When the amine (NH₂) group is stripped off of an amino acid, this amine group is converted to  
A.  lactic acid.
B.  glucose.
C.  ammonia.
D.  glycerol.
E.  urea.

90.  Arrange the following in correct sequence:
1 Ammonia is converted to urea in the liver.
2 Oxidative deamination of an amino acid.
3 Urea is eliminated by the kidney.
4 Ammonia and keto acids are formed.  
A.  1, 3, 4, 2
B.  2, 4, 1, 3
C.  3, 1, 4, 2
D.  4, 1, 3, 2
E.  2, 3, 1, 4