Test Your Knowledge - Free MCQ PRACTICE
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A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.
For each of the following multiple choice questions, choose the most appropriate answer :

1. Which of these genes codes for a protein that plays a role in white blood cell function?
A. DCP1 
B. MPO 
C. GLUT4 
D. RP13 

2. Bacterial protein called catabolic activator protein (CAP) is an example of
A. Negative control of gene expression 
B. Positive control of gene expression 
C. Second type of positive control of gene expression 
D. None of the above 

3. Chronic granulomatous disease results from a failure to perform oxidative burst. This deficiency would be most likely to interfere with
A. Dendritic cell activation to become a mature APC 
B. CTL killing of viruses 
C. Infected cell processing of virus peptides 
D. Macrophage intracellular killing of bacteria 

4. The last receiver of electrons in electron transport system is
A. Coenzyme Q 
B. FADH2 
C. O2 
D. Cytochrome b 

5. Fructose is metabolized by
A. Glyceraldehyde 3-phosphate pathway 
B. Fructose 6-phosphate pathway 
C. Both (a) and (b) 
D. Fructose 1-phosphate pathway 

6. Which of the following has been used as an evidence that primitive life forms lacked both DNA and enzymes?
A. DNA and enzymes are only present in the most advanced cells 
B. RNA can both code genetic information and act as a catalyst 
C. All of the above 
D. Advanced cells lack RNA 

7. What is the specificity of the Clostripain protease?
A. It cleave after Arg residues 
B. It cleave after His residues 
C. It cleave after Lys residues 
D. None of the above 

8. Reactions that have positive standard free energy changes (?Go> 0) can be made to occur in cells by
A. Coupling them to the hydrolysis of ATP 
B. All of the above 
C. Manipulating the concentrations of products and reactants such that G/<0 
D. Coupling them with exergonic reactions via a common intermediate 

9. Which of following RNA characteristically contains unusual purines and pyrimidmes?
A. RRNA 
B. NRNA 
C. MRNA 
D. TRNA 

10. Long-chain fatty acids are oxidized step-wise in one carbon units starting from the
A. Carboxyl end 
B. Aliphatic end 
C. Both (a) and (b) 
D. None of these 

11. What is the minimum number of ubiquitin molecules that must be added to a protein for its degradation in a proteasome?
A. 1 
B. 3 
C. 4 
D. 6 

12. Small charged molecules, often biogenic amines function as
A. Hormones 
B. Neurotransmitters 
C. Both (a) and (b) 
D. None of these 

13. If the Standard Gibb's free energy, ?G, for a reaction is positive then
A. The concentration of the reactants and products will be equal 
B. All of the reactant will be converted to product 
C. The products will be favored 
D. The reactants will be favored 

14. Food with maximum Cholesterol content
A. Coconut Oil 
B. Egg 
C. Hydrogenated Fats 
D. Ghee (Hydrogenated) 

15. Agarose gel electrophoresis and pulsed field gel electrophoresis may be used to resolve respectively
A. 2000 kb and 20kb DNA 
B. 20 kb and 2000 kb DNA 
C. 1000 kb and l0kb DNA 
D. 10 kb and 1000 kb DNA 

16. How many different codons are possible?
A. 3 
B. 20 
C. 64 
D. An infinite number 

17. Which pyrimidine base contains an amino group at carbon 4?
A. Cytosine 
B. Thymine 
C. Uracil 
D. Adenine 

18. Why do fluorescence spectrometers often use double-beam optics?
A. So a reference solution can be used 
B. To compensate for power fluctuations in the radiation source 
C. All of the above 
D. To compensate for beam attenuation by the monochromator 

19. Which of the following is not a necessary component of translation?
A. Anticodon 
B. MRNA 
C. Ligase 
D. Amino acid 

20. Which of these effects result from slow injection of a large sample volume?
A. Increased resolution 
B. Decreased resolution 
C. Non-linear detector response 
D. Constant resolution 

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