Simplified Medical Biochemistry

: The following are non-protein (non-proteinogenic) amino acids:
a. Arginine
b. Citrulline
c. Histidine
d. Homocysteine
e. Ornithine

: Amphipathic lipids include:
a) cholesterol.
b) cholesterol ester.
c) fatty acid.
d) sphingomyelin.
e) triacylglycerol.

: Which one of the following is the most abundant lipid in the human diet?
a) Cholesteryl ester.
b) Cholesterol.
c) Free fatty acid.
d) Phospholipid.
e) Triacylglycerol.

: Which one of the following is a non-heme protein?
a) Albumin
b) Catalase
c) Hemoglobin
d) Myoglobin
e) Peroxidase

: Heme-containing proteins (hemoproteins) include:
a aldolase
b carboxylase
c catalase
d hemoglobin
e myoglobin

: A 45-year-old chronic alcoholic presents with confusion, ataxia and ophthalmoplegia. Which of the following vitamin deficiencies is most likely responsible for this condition?
a Vitamin B₁ (Thiamine)
b Vitamin B₂ (Riboflavin)
c Vitamin B₃ (Niacin)
d Vitamin B₆ (Pyridoxine)
e Vitamin B₁₂ (Cobalamin)

: Lipids are soluble in the following solvents
a alcohol
b chloroform
c dilute hydrochloric acid
d ether
e water

: Examples of simple lipids include
a) cholesterol
b) cholesterol ester
c) fatty acid
d) triacylglycerol
e) wax

: Phosphate buffer system--
a) has a pK value closer to normal pH.
b) has a base-to-acid ratio of 20:1 at normal pH.
c) functions as a closed buffer system.
d) is more active in ICF than in ECF.
e) is the principal ECF buffer system.

: Which one of the following is the most abundant lipid component of the cell membrane?

a) Cholesterol
b) Fatty acid
c) Glycolipid
d) Glycerol
e) Phospholipid