Quiz Summary
0 of 20 Questions completed
Questions:
Information
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading…
You must sign in or sign up to start the quiz.
You must first complete the following:
Results
Results
0 of 20 Questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 point(s), (0)
Earned Point(s): 0 of 0, (0)
0 Essay(s) Pending (Possible Point(s): 0)
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- Current
- Review
- Answered
- Correct
- Incorrect
-
Question 1 of 20
1. Question
The model proposed by Watson, Crick and Wilkins consists of a double-stranded helical structure of the B form of DNA. Several bonds maintain the integrity of the DNA molecule. What bond is found in between the purine and pyrimidine bases of its respective linear molecules holding the two strands together of the doublestranded helix?
CorrectIncorrect -
Question 2 of 20
2. Question
In the prokaryotic gene expression, what is the genetic unit coding for the structure of the subunit of a protein molecule, acting as it does as the smallest unit of genetic expression?
CorrectIncorrect -
Question 3 of 20
3. Question
The occurrence of the 21st amino acid in proteins is uncommon; however, it is present at the active site of several human enzymes that catalyze redox reactions. Replacement of this amino acid with another can result in significantly decreased catalytic activity and might impair a kind of human protein which has been implicated in tumorigenesis, atherosclerosis and Keshan disease. What is this amino acid?
CorrectIncorrect -
Question 4 of 20
4. Question
The Kreb’s-Henseleit Cycle is a pathway present only in the liver useful in the removal of nitrogenous waste products in the body. The “bottleneck” reaction and the metabolite flux of this pathway is reduced when the catalytic efficiency or quantity of what catalyst is decreased?
CorrectIncorrect -
Question 5 of 20
5. Question
The different etiologies of jaundice can be classified into prehepatic, hepatic and post hepatic causes. Differentiation of these causes can be evaluated by determination of bilirubin levels in the serum, urine and feces. What is the clinical significance of acholuric jaundice?
CorrectIncorrect -
Question 6 of 20
6. Question
Impairment of oxidation of fatty acids gives rise to several diseases. An example of which is Refsum’s disease, a rare neurologic disorder due to a metabolic defect resulting in the accumulation of a certain substance found in dairy products and ruminant fat and meat. What is this substance thought to have pathological effects on membrane function, protein prenylation and gene expression?
CorrectIncorrect -
Question 7 of 20
7. Question
There are several types of mutation which involves any permanent heritable change in the DNA base sequence of an organism. What type of mutation causes a possible decrease in protein function because the new codon specifies for a different amino acid?
CorrectIncorrect -
Question 8 of 20
8. Question
Blotting is a method used to study macromolecules like DNA, RNA and proteins which are separated by gel electrophoresis and transferred into a carrier. The macromolecules can then be visualized by specific probes or staining methods. Which of the following methods is a modification of the Western Blot Technique by detecting posttranslational modification of proteins?
CorrectIncorrect -
Question 9 of 20
9. Question
Which of the following conditions involve severe diminution or absence of most oxidoreductases of the respiratory chain as this affects all complexes of the ETC?
CorrectIncorrect -
Question 10 of 20
10. Question
Immunoglobulins (Ig) play a key role in the defense mechanism of the body. Each class of Ig has its own distinct property for it to confer its specific function. Among the 5 classes, based on its structure, which of the Ig may exist as a dimer?
CorrectIncorrect -
Question 11 of 20
11. Question
An adult man suffered from stable angina pectoris for 15 yrs. During which time there was progressive heart failure and repeated pulmonary thromboembolism, on his death at age 63, autopsy disclosed enormous cardiomyopathy (1100 g), cardiac storage of globotriaosylceramide (11 mg lipid/g wet weight) and restricted cardiocytes. Which of the following lipid storage disease would result in these clinical findings?
CorrectIncorrect -
Question 12 of 20
12. Question
Lipoprotein lipase (LPL) is the endothelial cellassociated enzyme necessary for release of fatty acid from circulating lipoproteins. Which of the following apolipoproteins is required to activate LPL-mediated release of fatty acids from chylomicrons?
CorrectIncorrect -
Question 13 of 20
13. Question
Hemochromatosis, a disorder that is the result of excess iron accumulation, is caused by deficiencies in which of the following proteins?
CorrectIncorrect -
Question 14 of 20
14. Question
One important function of nitric oxide is the induction of vascular smooth muscle relaxation in response to acetylcholine.
The production of NO requires which amino acid?
CorrectIncorrect -
Question 15 of 20
15. Question
Hepatocytes deliver ketone bodies to the circulation because they lack which of the following enzymes?
CorrectIncorrect -
Question 16 of 20
16. Question
The inability to rapidly synthesize DNA during the process of erythrocyte maturation leads to abnormally enlarged erythrocytes. This disorder referred to macrocytic anemia and is caused by a deficiency in which of the following vitamins?
CorrectIncorrect -
Question 17 of 20
17. Question
Hypersensitive individuals have IgE to specific antigens on the surface of their WBC. When these individuals are challenged with antigen, the antigen-IgE complexes induce synthesis and release of which of the following physiologically potent lipids?
CorrectIncorrect -
Question 18 of 20
18. Question
Which of the following represents the enzyme deficiency that leads essential fructosuria?
CorrectIncorrect -
Question 19 of 20
19. Question
There is but a single enzyme-catalyzed reaction in the human body known to generate carbon monoxide as one of its products. Which of the following enzymes represents the CO-producing reaction?
CorrectIncorrect -
Question 20 of 20
20. Question
Obesity, genetic profile and aging all contribute to the development of Type II DM. Which is the most important additive factor for these 3 conditions in the development of type II DM?
CorrectIncorrect