Test Your Knowledge - BIOLOGY MCQ PRACTICE
by Saksham Chaudhry : Turning Point Institute, Paschim Vihar, New Delhi 110063 T: 01147244724, 9810315579
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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. The comers of the cells of collenchyma tissue in plants are thickened due to the deposition of :
A. Lignin and Suberin 
B. Suberin and Cutin 
C. Cellulose and Peetin 
D. Chitin and Lignin 

2. Mutation is
A. a factor responsible for plant growth 
B. a change which affects the offspring of F2 generation only 
C. a change that is inherited 
D. a change which affects the parents 

3. The combination of foods providing protein quality nearest to that of meat is:
A. Wheat, dal and groundnuts 
B. bread and butter 
C. sprouted gram and groundnuts 
D. groundnuts and jaggery 

4. Which one of the following is a product of the dark reactions of photosynthesis?
A. ATP 
B. NADH2 
C. NADPH2 
D. sugar 

5. A sewage treatment process in which a portion of the decomposer bacteria present in the waste is recycled into the beginning of the process. is called
A. cyclic treatment 
B. primary treatment 
C. activated sludge treatment 
D. tertiary treatment 

6. Which of the following is not a class of arthropods?
A. Myriapoda 
B. Onychophora 
C. Polychaeta 
D. lnsecta 

7. The bird without cloaca is the
A. duck 
B. pigeon 
C. parrot 
D. none of these 

8. During sleep a man's blood pressure :
A. increases 
B. decreases 
C. remains constant 
D. fluctuates 

9. In which form is carbon dioxide mainly transported in blood?
A. As carbamino-haemoglobin 
B. As carbonic acid 
C. As hydrogencarbonate 
D. In solution 

10. Like other body cells, the epithelial cells lining the stomach are protein in nature. Yet the epithelial lining is not digested by the powerful proteolytic enzyme secreted by the stomach because
A. the excess acidity of gastric juice destroys this enzyme 
B. the mucus secreted by mucus protects against autodigestion 
C. a rich microflora of bacteria makes the enzyme totally inactive for autodigestion 
D. both mucus and bacteria give protection against autodigestion 

11. Patients who excrete large quantities of sodium in the urine have
A. defective cells lining the villi of ileum that fail to reabsorb Na+ 
B. erraticrenal threshold for Na+ 
C. diseased adrenal cortex 
D. diseased adrenal medulla 

12. The National Bureau of Plant Genetic Resources is located at
A. Bangalore 
B. Jammu 
C. New Delhi 
D. Shillong 

13. The crystal of lead zirconate is a key component of
A. Electroencephalography 
B. Electrocardiography 
C. Magnetoencephalography 
D. Sonography 

14. The sucker fish Remora on shark is an example of
A. predation 
B. symbiosis 
C. parasitism 
D. commensalism 

15. The expulsion of milk from the breast during suckling is brought about by
A. prolactin 
B. oxytocin 
C. vasopressin 
D. estrogen and progesterone 

16. Molybdenum plays a large role in
A. Carbon fixation 
B. Nitrogen fixation 
C. Chromosome condensation 
D. Promoting flowering 

17. Farmers in a particular region were concerned that pre-lnature yellowing of leaves of a pulse crop might cause deaease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?
A. Frequent irrigation of the crop 
B. Treatment of the plants with cytokinins alongwith a small dose of nitrogenous fertilizer 
C. Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5-trichlorophenoxy acetic acid 
D. Application of iron and magnesium to promote synthesis of chlorophyll 

18. Tracheids of anglospems are recognised by the presence of
A. Scalaiform perforation plates 
B. Scaiaiionn thickening 
C. Bordeied pits 
D. None of the above 

19. In which form CO2 is carried in the blood ?
A. Potassium bicarbonate 
B. Potassium carbonate 
C. Sodium bicarbonate 
D. Sodium carbonate 

20. Streptomycin is produced by
A. Streptomyces scoleus 
B. Streptomyces fradie 
C. Streptomyces venezuel 
D. Streptomyces griseus 

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