MCQOPTIONS
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MCQOPTIONS
This section includes 58 Mcqs, each offering curated multiple-choice questions to sharpen your 10th knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The energy value of biogas is typically |
| A. | 400-700 BTU/ft3 |
| B. | 1,000 BTU/ft3 |
| C. | 1500 BTU/ft3 |
| D. | more than 5000 BTU/ft3 |
| Answer» B. 1,000 BTU/ft3 | |
| 2. |
The groups of symbiotic bacteria, which have the ability to fix nitrogen |
| A. | derive their food and minerals from the legume, and in turn they supply the legume with some or all of its nitrogen |
| B. | grow together for a mutual benefit is called symbiosis and so these bacteria are called symbiotic nitrogen-fixing bacteria |
| C. | these bacteria are from the genus, Rhizobium |
| D. | all of the above |
| Answer» E. | |
| 3. |
Nitrogen fixation |
| A. | changes the free nitrogen (N2) to a form usable by plants |
| B. | especially changes nitrogen compounds, mostly amines such as NH2 |
| C. | both (a) and (b) |
| D. | fix the free nitrogen (N2) by which it should not be usable by plants |
| Answer» D. fix the free nitrogen (N2) by which it should not be usable by plants | |
| 4. |
Nitrogen fixation by the microorganisms can be detected by adopting the approach of |
| A. | demonstrating growth in a nitrogen free medium |
| B. | cultivating the microorganisms in the presence of nitrogen labeled with isotropic nitrogen |
| C. | measuring15N2 by mass spectrometer |
| D. | all of the above |
| Answer» E. | |
| 5. |
Degree of compost maturity can be assesed by |
| A. | infrared technique |
| B. | germination test |
| C. | both (a) and (b) |
| D. | none of the above |
| Answer» D. none of the above | |
| 6. |
Denitrification is |
| A. | reduction of nitrate (NO3-) to nitrogen gas |
| B. | reduction of nitrate to organic nitrogen compounds |
| C. | both (a) and (b) |
| D. | changing of atmospheric nitrogen (N2) to nitrogen compounds |
| Answer» D. changing of atmospheric nitrogen (N2) to nitrogen compounds | |
| 7. |
Nitrogen oxidation (nitrification)refers to the |
| A. | conversion of ammonium ions into nitrates through the activities of certain bacteria. |
| B. | changing of atmospheric nitrogen (N2) to nitrogen compounds |
| C. | sulfur is oxidized to the sulfate form through Thiobacillus bacteria |
| D. | none of the above |
| Answer» B. changing of atmospheric nitrogen (N2) to nitrogen compounds | |
| 8. |
Which of the following is true about ISO 2002 method for Salmonella detection? |
| A. | Selenite cystine (SC) broth is replaced by Muller Kauffmann tetrathionate novobiocin broth (MKTTn) |
| B. | Rappaport Vassiliadis (RV) broth has been replaced by Rappaport Vassiliadis Soya (RVS) broth |
| C. | XLD is the first isolation medium rather than BGA |
| D. | All of these |
| Answer» E. | |
| 9. |
Enumeration of microorganism refers to |
| A. | either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar, or non-selective plate, depending on the test |
| B. | either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar |
| C. | non-selective plating, depending on the test |
| D. | none of the above |
| Answer» B. either spiral plating, pour plate or spread plate of a food suspension on to a suitable selective agar | |
| 10. |
The different ACC's between food categories reflect the |
| A. | expected level of contamination of the raw material |
| B. | potential for microbial growth during storage |
| C. | potential shelf life |
| D. | all of the above |
| Answer» E. | |
| 11. |
Which of the following is not true for the thermal resistance of the bacterial cells? |
| A. | Cocci are usually more resistant than rods |
| B. | Higher the optimal and maximal temperatures for growth, higher the resistance |
| C. | Bacteria that clump considerably or form capsules are difficult to kill |
| D. | Cells low in lipid content are harder to kill than other cells |
| Answer» E. | |
| 12. |
Most fish do not sink in water because of the presence of swim bladderair bladderair sacsair in spongy bones |
| A. | I and II are correct |
| B. | II and III are correct |
| C. | III and IV are correct |
| D. | I, II, III and IV are correct |
| Answer» B. II and III are correct | |
| 13. |
One of the important consequences of geographical isolation is |
| A. | Preventing Speciation |
| B. | Random creation of new species |
| C. | No change in the isolated fauna |
| D. | Speciation through reproductive isolation |
| Answer» E. | |
| 14. |
The raw material for evolution is |
| A. | Selection |
| B. | Genetic drift |
| C. | Mutation |
| D. | migration |
| Answer» D. migration | |
| 15. |
The accuracy of estimating breeding value of a sire increased by --------- |
| A. | Decreasing the number of sires under test |
| B. | Decreasing the number of progeny of sire |
| C. | Increasing the number of progeny of sire |
| D. | Remains constant number of progeny of sire |
| Answer» D. Remains constant number of progeny of sire | |
| 16. |
Animal pharming can be defined as |
| A. | Growing animals for farming |
| B. | Generating transgenic animals for farming |
| C. | Programming animals to produce novel products |
| D. | Treatment for farming animals |
| Answer» D. Treatment for farming animals | |
| 17. |
The law which ensures environmental stability and maintenance of ecological balance is |
| A. | Forest Act 1927 |
| B. | Wildlife Act1972 |
| C. | Wild life protection Act 1991 |
| D. | National forest policy 1988 |
| Answer» E. | |
| 18. |
Endemic species are |
| A. | rare species |
| B. | species localized in a specific region |
| C. | cosmopolitan in distribution |
| D. | critically endangered species |
| Answer» C. cosmopolitan in distribution | |
| 19. |
Which of the following is NOT causing the net CO2 in the atmosphere to increase? |
| A. | photosynthesis |
| B. | burning gasoline |
| C. | deforestation |
| D. | burning coal |
| Answer» B. burning gasoline | |
| 20. |
The basic Ig unit is composed of |
| A. | Two identical heavy and two identical light chains |
| B. | Two identical heavy and two different light chains |
| C. | Two different heavy and two identical light chains |
| D. | Two different heavy and two different light chains |
| Answer» B. Two identical heavy and two different light chains | |
| 21. |
Which of the following does not protect body surfaces? |
| A. | Skin |
| B. | Mucus |
| C. | Gut microflora |
| D. | Salivary amylase |
| Answer» E. | |
| 22. |
The following organisms have been proposed as a best source of single cell protein. |
| A. | Cyanobacteria |
| B. | Aspergillus |
| C. | Bacillus |
| D. | Pseudomonas |
| Answer» B. Aspergillus | |
| 23. |
A protozoan is generally called as |
| A. | motile procaryotic unicellular protest |
| B. | motile eucaryotic unicellular protest |
| C. | motile eucaryotic unicellular photosynthetic protist |
| D. | motile eucaryotic multicellular protest. |
| Answer» D. motile eucaryotic multicellular protest. | |
| 24. |
Which of the following does not belong to lower respiratory tract? |
| A. | Larynx |
| B. | Trachea |
| C. | Bronchi |
| D. | Lungs |
| Answer» B. Trachea | |
| 25. |
Which of the following hormone has metabolic effects opposite to that of insulin? |
| A. | Calcitonin |
| B. | Testosterone |
| C. | Mineralocorticoid |
| D. | Glucocorticoid |
| Answer» E. | |
| 26. |
Synthesis and secretion of testosterone is regulated by |
| A. | ACTH |
| B. | FSH |
| C. | LH |
| D. | LTH |
| Answer» D. LTH | |
| 27. |
Atrophy of cerebral cortex leads to |
| A. | Stroke |
| B. | Meningitis |
| C. | Alzheimers |
| D. | Parkinsons |
| Answer» D. Parkinsons | |
| 28. |
The inhibitory process of respiratory centre in brain that regulates the extent of inspiration is known as |
| A. | Pavlov reflex |
| B. | Spinal reflex |
| C. | Neuro - endocrine reflex |
| D. | Herring - Breuer reflex |
| Answer» E. | |
| 29. |
Which of the following is not a regulatory function of lungs? |
| A. | Water balance |
| B. | Acid - base |
| C. | Body temperature |
| D. | Heart rate |
| Answer» E. | |
| 30. |
Joint dislocation caused by poliomyelitis is |
| A. | Congenital |
| B. | Traumatic |
| C. | Pathological |
| D. | Paralytic |
| Answer» E. | |
| 31. |
Saffron is produced from |
| A. | Roots of Indigofera |
| B. | Petals of Rosa |
| C. | Stamens of Hibiscus |
| D. | Style and stigma of Crocus |
| Answer» E. | |
| 32. |
The method of producing thousands of plants through tissue culture is called |
| A. | Micropropagation |
| B. | Somatic hybridization |
| C. | Biofortification |
| D. | Biomagnification |
| Answer» B. Somatic hybridization | |
| 33. |
Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide? |
| A. | Black rust of wheat |
| B. | Bacterial leaf blight of rice |
| C. | Downy mildew of grapes |
| D. | Loose smut of wheat |
| Answer» D. Loose smut of wheat | |
| 34. |
Consider the following statements (A-D) about organic farming A. Utilizes genetically modified crops like Bt cotton B. Uses only naturally produced inputs like compost C. Does not use pesticides and urea D. Produces vegetables rich in vitamins and minerals Which of the above statements are correct? |
| A. | (B) and (C) only |
| B. | (A) and (B) only |
| C. | (B), (C) and (D) |
| D. | (C) and (D) only |
| Answer» B. (A) and (B) only | |
| 35. |
Consider the following statements (A-D) about organic farming |
| A. | Utilizes genetically modified crops like Bt cotton |
| B. | Uses only naturally produced inputs like compost |
| C. | Does not use pesticides and urea |
| D. | Produces vegetables rich in vitamins and minerals |
| Answer» B. Uses only naturally produced inputs like compost | |
| 36. |
In order to obtain disease-free plants through tissue culture techniques, the best method is |
| A. | Protoplast culture |
| B. | Anther culture |
| C. | Embryo rescue |
| D. | Meristem culture |
| Answer» E. | |
| 37. |
Which of the following is the common respiratory substrate? |
| A. | Proteins |
| B. | Lipids |
| C. | Carbohydrates |
| D. | Vitamins |
| Answer» D. Vitamins | |
| 38. |
Which of the following is an ephyphitic plants? |
| A. | Rice |
| B. | Vanda |
| C. | Cuscuta |
| D. | Viscum |
| Answer» C. Cuscuta | |
| 39. |
In C3 plants, photosynthesis occurs in |
| A. | Mesophyll cells |
| B. | Bundle sheath cells |
| C. | Both mesophyll and bundle sheath cells |
| D. | Cortex cells |
| Answer» B. Bundle sheath cells | |
| 40. |
The Non-cyclic photophosphorylation is associated with |
| A. | PS-I |
| B. | PS-II |
| C. | PS-I & II |
| D. | PIS |
| Answer» D. PIS | |
| 41. |
An example for transferase is |
| A. | transaminase |
| B. | pyruvic carboxylase |
| C. | histidine decarboxylase |
| D. | G-3-P dehydrogenase |
| Answer» B. pyruvic carboxylase | |
| 42. |
When the genotype of an organism is improved by the addition of foreign gene, the process is called |
| A. | Tissue culture |
| B. | Genetic diversity |
| C. | Genetic engineering |
| D. | Plastic surgery |
| Answer» D. Plastic surgery | |
| 43. |
Golden rice is a transgenic crop of the future with the following improved trait |
| A. | High lysine content |
| B. | Insect resistance |
| C. | High protein content |
| D. | High Vitamin-A content |
| Answer» E. | |
| 44. |
Which of the following is not a component of cell membrane? |
| A. | Lipid |
| B. | Nucleic acids |
| C. | Carbohydrate |
| D. | Proteins |
| Answer» C. Carbohydrate | |
| 45. |
A DNA strand with the sequence AACGTAACG is transcribed.What is the sequence of the mRNA molecule synthesized? |
| A. | AACGTAACG |
| B. | UUGCAUUGC |
| C. | AACGUAACG |
| D. | TTGCATTGC |
| Answer» C. AACGUAACG | |
| 46. |
One of the following structure of Cockroach is responsible for water conservation. |
| A. | Spiracles |
| B. | Hepatic caeca |
| C. | Malpighian tubules |
| D. | short midgut |
| Answer» E. | |
| 47. |
The most accepted theory of origin of life is |
| A. | Special creation theory |
| B. | Theory of abiogenesis |
| C. | Oparin haldane theory |
| D. | Theory of spontaneous generation |
| Answer» D. Theory of spontaneous generation | |
| 48. |
Procambium gives rise to ________________ |
| A. | primary vascular tissues |
| B. | epidermis |
| C. | cortex |
| D. | pith |
| Answer» B. epidermis | |
| 49. |
Differentiation is change of tissues from_________________. |
| A. | meristematic to permanent |
| B. | simple to complex |
| C. | complex to simple |
| D. | permanent to meristematic |
| Answer» B. simple to complex | |
| 50. |
Morphologically, a _____________is a group of cells, which are similar in origin, form and function. |
| A. | tissue |
| B. | tissue system |
| C. | organ |
| D. | organ system |
| Answer» B. tissue system | |