Test Your Knowledge - Free MCQ PRACTICE
by Saksham Chaudhry : Paschim Vihar, New Delhi 110063 T: 1142316457, 9810570740
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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. Nucleoside is a pyrimidine or purine base
A. Covalently bonded to a sugar 
B. Ionically bonded to a sugar 
C. Hydrogen bonded to a sugar 
D. None of the above 

2. How many molecules of ATPs are synthesized per NADH oxidation?
A. 2 
B. 1 
C. 3 
D. 4 

3. Which of the following relationships between absorbance and %transmittance is incorrect?
A. A = log10 100 / %T 
B. A = 2 - log10 %T 
C. A = log10 1 / T 
D. All are correct 

4. The accepted hypothesis for DNA replication is
A. Evolutionary theory 
B. Dispersive theory 
C. Conservative theory 
D. Semi-conservative theory 

5. Humans are unable to digest
A. Starch 
B. Complex carbohydrates 
C. Denatured proteins 
D. Cellulose 

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

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

8. Lack of reaction to our own human leukocyte antigens (HLAs) is known as?
A. Autoimmunity 
B. Complement system 
C. Clonal selection 
D. Tolerance 

9. Cysteine can be synthesised from
A. Methionine 
B. Arginine 
C. Histidine 
D. Lysine 

10. Better understanding of the nuclei is possible,
A. With the help of wavelength spectrum 
B. With the help of frequencies ranges 
C. With the help of a mathematical translator called the fourier transfer algorithm 
D. None of the above 

11. A deficiency of thiamin produces the disease known as
A. Beri-beri 
B. Scurvy 
C. Cataract 
D. Anemia 

12. Which of the following is not a function of iron?
A. Oxygen transport 
B. Immune function 
C. Brain function 
D. Gene regulation 

13. Unpaired H-bond donors and acceptors are found in the hydrophobic core of a protein
A. Only at the ends of a-helices 
B. Only at the turns connecting p-strands 
C. Only on Pro residues 
D. Rarely 

14. Nitrate reduction can be carried out by
A. Only microorganism 
B. Plant and microorganism 
C. Only plants 
D. None of these 

15. The Standard Gibb's free energy, ?G, is
A. The energy required to convert one mole of reactants to one mole of products 
B. The residual energy present in the reactants at equilibrium 
C. The residual energy present in the products at equilibrium 
D. The difference in the residual energy of reactants and products at equilibrium 

16. In postprandial state, which of the following amino acid is extracted predominantly by muscle, having been spared by the liver?
A. Alanine 
B. Valine 
C. Glutamate 
D. Glutamine 

17. Difficulties with somatic gene therapy arise from all of the following except
A. Inserting a gene so that it will function properly 
B. Limited life span of more mature hematopoietic cells 
C. Transducing genetic material into stem cells 
D. GVHD caused by mature T cells in the transplanted cells 

18. Which of the following is incorrect with regard to antigen epitopes?
A. Epitopes may be linear or assembled 
B. An epitope may be shared by two different antigens 
C. A protein molecule usually contains multiple epitopes 
D. B cells bind only processed antigen epitopes 

19. Which of the following is the substrate for rate-limiting enzyme of polyamine biosynthesis?
A. Histidine 
B. Cadaverine 
C. Ornithine 
D. Anandamide 

20. Method of chromatography in which molecules that are negatively charged are selectively released from stationary phase into the positively charged molecules in mobile phase is termed.
A. Ion - Exchange chromatography 
B. Affinity chromatography 
C. Adsorbtion chromatography 
D. Size - exclusion chromatography 

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