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. What type of long chain alcohol is esterified to plant chlorophyll molecules?
A. Dolichol 
B. Farnesol 
C. Phytol 
D. None of these 

2. pH of the fermentation medium for chlorotetracyclins is
A. 5-6 
B. 6-7 
C. 7-8 
D. 8-9 

3. Which is not true about a photon?
A. It donates electron to reduce carbon dioxide to glucose 
B. It is trapped by photosynthetic unit 
C. It is a packet of light energy 
D. The shorter the wavelength, the greater the energy of the photons 

4. The advantage of using DNA polymerases from thermophilic organisms in PCR is that
A. The DNA polymerases of these bacteria can withstand the high temperatures needed to denature the DNA strands 
B. The DNA polymerases of these bacteria never make mistakes while replicating DNA 
C. The DNA polymerases of these bacteria are much faster than those from other organisms 
D. All of the above 

5. Human serum albumin has been synthesized by
A. Any of the above 
B. Transgenic maize plants 
C. Transgenic potato and tobacco plants 
D. Transgenic wheat plants 

6. The percentage of individual with a given genotype, which exhibits the associated phenotype, is defined as
A. Expressivity 
B. Environmental influence 
C. Inheritance percent 
D. Penetrance 

7. The disorder in which of the following may cause "Ehlers-Danlos Syndrome"?
A. Dlashin protein 
B. Collagen protein 
C. Fibrin protein 
D. Globulin protein 

8. Some cross reactions with monoclonal antibodies (MAbs) can occur. Unexpected cross reactions occur more frequently with
A. Ig MAbs 
B. IgG 
C. IgA 
D. IgE 

9. A genomic library is
A. A database where the sequence of an organism's genome is stored 
B. A collection of many clones possessing different DNA fragments from the same organisms bound to vectors 
C. A place where the information of the genetic organization of organisms are kept. 
D. A book that describes how to isolate DNA from a particular organism 

10. Accumulation of lactate leads to
A. Increase in pH 
B. No change in pH 
C. No loss of cell viability 
D. Reduction in the pH of culture hence loss of cell viability 

11. Range of osmolarity tolerated/accepted in mOsm/Kg of H2O by mammalian cells is
A. 150-300 
B. 280-360 
C. 300-325 
D. 360-400 

12. The Southern blotting technique depends on
A. Similarities between the sequences of probe DNA and experimental DNA 
B. The molecular mass of proteins 
C. Similarities between the sequences of probe RNA and experimental RNA 
D. Similarities between the sequences of probe protein and experimental protein 

13. During which phase of growth of Penicillium chrysogenum maximum antibiotic production takes place
A. During the third phase 
B. During the first phase 
C. Same in all the phases 
D. During the second phase 

14. What is meant by 'Organ culture' ?
A. The aspects of culture in community which are mainly dedicated by the need of a specified organ of the human body 
B. Maintenance alive of a whole organ, after removal from the organism by partial immersion in a nutrient fluid 
C. Introduction of a new organ in an animal body with a view to create genetic mutation in the progenies of that animal 
D. Cultivation of organs in a laboratory through the synthesis of tissues 

15. Spirit vinegar is produced from
A. Fruit juices 
B. Malted grain 
C. Ethanol 
D. Ale 

16. A plasmid can be considered as a suitable cloning vector if
A. All of the above 
B. It can be readily isolated from the cells 
C. It possesses a single restriction site for one or more restriction enzymes 
D. Insertion of foreign DNA does not alter its replication properties 

17. Preliminary clinical results with a humanized antibody against the interleukin-2 receptor have suggested the
A. Absence of human immune response against murine proteins (HAMA) response 
B. Presence of HAMA response 
C. Poor recognition of immunoglobulin, Ig constant regions 
D. All of the above 

18. The element neon (Ne) has eight electrons in its outermost electron shell. How many covalent bonds will Ne readily form?
A. None 
B. One 
C. Two 
D. Four 

19. The spindle forms in the
A. G1 phase 
B. G2 phase 
C. M phase 
D. S phase 

20. Which of the following from a blood clot stimulates the growth of cells in the healing process?
A. EGF 
B. PDGF 
C. MPF 
D. NGF 

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