SOLUTION (212 Questions with 100% Correct Answers)
What are the most prevalent saturated fatty acids in the average US diet?
A. palmitic and stearic acid
B. oleic and linoleic
C. linoleic and linolenic
D. acetic and butyric Correct Answer: A. palmitic and stearic acid
What is formed when fatty acids are oxidized in the mitochondria?
A. glycerol
B. pyruvate
C. triacylglyceride
D. acetyl CoA Correct Answer: D. Acetyl CoA
What is the normal product of fatty acid synthase?
A. Triacylglyceride
B. Palmitate
C. n-3 fatty acid
D. n-6 fatty acid Correct Answer: B. Palmitate
Which fatty acid is considered essential and must be supplied by the diet?
A. a-linolenic acid
B. Linoleic acid
C. y-linolenic acid
D. Arachidonic acid
E. A and B Correct Answer: E. a-linolenic acid and linoleic acid
Humans build about ____mg of cholesterol each day.
A. 100
B. 300
C. 700
D. 2000 Correct Answer: C. 700
Cholesterol is a precursor of the following except
A. Estrogens and androgens;
B. Glucocorticoids;
C. Bile acids;
D. Vitamin D
E. Phospholipids. Correct Answer: E. phospholipids
What is the most active site of lipid digestion?
A. stomach
B. duodenum
C. upper jejunum
D. ileum Correct Answer: C. upper jejunum
,The main function of lipoproteins is
A. To facilitate lipid digestion;
B. To protect against CVD;
C. To act as the carrier of lipids;
D. To provide energy;
E. All of the above. Correct Answer: C. to act as the carrier of lipids
The main component of a HDL, molecule is protein
A. True
B. False Correct Answer: A. True
LDL-cholesterol is often termed "bad cholesterol" because it has been linked to atherogenic fatty
plaque formation
A. True
B. False Correct Answer: A. True
Trans unsaturated fatty acids are now considered more atherogenic than saturated fatty acids
because they
A. are unnatural and only formed during fat processing;
B. cause excess blood clotting;
C. elevate serum LDL while decreasing HDL;
D. are saturated completely Correct Answer: C. elevate serum LDL while decreasing HDL
The mechanism of action of Orlistat is
A. To inhibit pancreatic lipase activity;
B. To destroy bile acids in the small intestine;
C. To decrease appetite;
D. None of the above;
E. All of the above. Correct Answer: A. To inhibit pancreatic lipase activity
Why are n-3 PUFA the "best"? Correct Answer: Interfere with platelet aggregation by inhibiting
thromboxane production, reduces of pro inflammatory cytokines,
What omega 3s are better, Short or long chain? Correct Answer: Long chain, more consistently
converted to anti-inflammatory uses
Which hormone is considered to be an antagonist of lipolysis?
A. insulin
B. epinephrine
C. glucagon
D. Adrenocorticotropic hormone
E. None of the above. Correct Answer: A. Insulin
Excessive ketone bodies may accumulate due to reduced supply of cellular glucose as well as
____ fatty acid oxidation
,A. increase;
B. decrease;
C. no change. Correct Answer: A. increase
What is the legally intoxicated amount of alcohol in bloodstream?
A. Less than 10 mg%;
B. 11-24 mg%;
C. 25-45 mg%;
D. 50-100 mg%;
E. None of the above Correct Answer: A. less than 10mg%
What happens when alcohol is metabolized by the liver? Correct Answer: FA synthesis, leads to
fatty liver
Enzymes:
A. decrease the free energy change of a reaction;
B. increase the activation energy of a reaction;
C. decrease transition energy;
D. increase the equilibrium constant of a reaction;
E. None of the above. Correct Answer: C. decrease the transition/activation energy
About ______ of the dry weight of a typical human cell is protein.
A. one-tenth
B. one-fifth
C. one-third
D. one-half Correct Answer: D. one-half
Which of the following statements concerning collagen is not true?
A. Collagen is a major connective tissue protein;
B. Collagen is made up of tropocollagen;
C. Tropocollagen consists of three peptide chains that are cross-linked triple helix;
D. Collagen has a large amount of glycine and proline;
E. Collagen contains unique hydroxyglycine and hydroxyproline Correct Answer: E. Collagen
contains unique hydroxyglycine and hydroxyproline
It actually contains hydroxylysine and hydroxyproline that are unique to collagen
For each function listed in Questions 1-5, select the most closely related plasma proteins:
1. Nonspecific transport protein for fatty acids.
2. Inhibitor of elastase to protect against smoke induced obstructive lung disease.
3. Antibodies.
4. Major transport protein for copper.
5. major transport protein for iron Correct Answer: 1. Albumin
2. a1-globulins
3. y-globulins
4. a2-globulins
, 5. B-globulins
A deficiency in which of the following amino acids will result in Kwashiokor, even though the
diet may contain a large amount of protein
A. Serine;
B. Glutamate;
C. Tryptophan;
D. Alanine;
E. Asparagine. Correct Answer: C. Tryptophan
Which of the following immunity functions is associated with a significant uptake of intact
protein occurred in Small Intestine?
A. Passive immunity during infancy;
B. IgG protects against infection in uteri during neonatal period;
C. IgA secrets in milk;
D. IgM responds first to a new antigen;
E. IgE is responsible for allergy. Correct Answer: A. Passive immunity during infancy
A patient came to the ER complaining of severe abdominal pain, Lab analysis revealed high
conc. of dibasic amino acids in urine, Pain subsided a few hours later after he passed kidney
stone. The most likely diagnosis for this patient is
A. Hartnup;
B. Cystinuria;
C. Kwashiorkor;
D. Hyperammonemia;
E. Scurvy Correct Answer: B. Cystinuria
What percent of the circulation amino acids are contributed to protein synthesis?
A. 9;
B. 10-25;
C. 30-40;
D. 45-55;
E. 75. Correct Answer: E. 75%
What is the first step in catabolism of amino acids Correct Answer: transamination
What is the second step in catabolism of amino acids? Correct Answer: deamination
In humans the major route of nitrogen transfer from amino acids into ammonia involves which of
the following pairs of enzymes?
A. Glutamine synthetase and urease;
B. Transaminases and glutaminase;
C. Glutamate dehydrogenase and transaminases;
D. Amino acid oxidases and arginase;
E. Glutaminase and amino acid oxidases Correct Answer: C. glutamate dehydrogenase and
transaminases