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Home » GAT Subject » Agriculture » Aptitude Test - 7
1.The fruit and vegetables contain an insoluble stiffening material called______________________?
A. Pectin
B. Lig in
C. Protopectin
D. Pectin
2.Oxidative rancidity can be accelerated by the presence of certain divalent and polyvalent __________________________?
A. Metals
B. Light
C. High temperature
D. Metals
3.Colour changes leading to brown, grey and other in fresh and cured meat can be arise from_____________________?
A. Biochemical changes
B. Physical changes
C. Microbial activity
D. Biochemical changes
4.Dairy product regularly suffers from rancid, goaty and unclean taints due to excessive concentration of_____________________?
A. C11C20fatty acids
B. C20C22fatty acids
C. C12C20fatty acids
D. C11C20fatty acids
5.Chemically or bio chemically enzymes are primarily__________________?
A. Carbohydrates
B. Lipids
C. Vitamins
D. Carbohydrates
6. Which of the following produces citric acid?
A. Aspergillus
B. Pseudomonas
C. Saccharomyces
D. Aspergillus
7. Which of the following organism is nitrogen-fixing and found in rice fields in symbiotic association with Azolla?
A. Frankia
B. Tolypothrix
C. Spirulina
D. Frankia
8.Which of the following is used as a biofertilizer for soyabean crop?
A. Rhizobium
B. Azotobacter
C. Nostoc
D. Rhizobium
9.A common biopesticide for preventing plants from butterfly caterpillars is
A. Trichoderma
B. Baculovirus
C. Glomus
D. Trichoderma
10. Yeast is used for the production of
A. Tetracycline
B. Butanol
C. Ethanol
D. Tetracycline
11. Which alga can be used as food for the human being?
A. Chlorella
B. Polysiphonia
C. Ulothrix
D. Chlorella
12.Which of the following microorganisms is not used as a biofertilizer?
A. Rhizobium
B. Nostoc
C. Mycorrhiza
D. Rhizobium
13.Find the incorrectly matched pair
A. Serratia – Drug addiction
B. Spirulina – Single cell protein
C. Rhizobium – Biofertilizer
D. Serratia – Drug addiction
14.Find the incorrectly matched pair
A. Serratia – Drug addiction
B. Spirulina – Single cell protein
C. Rhizobium – Biofertilizer
D. Serratia – Drug addiction
15.Trichoderma harzianum is useful for
A. Bioremediation of contaminated soils
B. Gene transfer in higher plants
C. Reclamation of wastelands
D. Bioremediation of contaminated soils
16. Which of the following organisms is used in alcoholic fermentation?
A. Pseudomonas
B. Aspergillus
C. Saccharomyces
D. Pseudomonas
17.NaCl can act as
A. antagonist at optimal concentrations
B. synergistically if added in excess of optimum level
C. Both (a) and (b)
D. antagonist at optimal concentrations
18. A psychrophilic halophile would be a microbe that prefers
A. cold temperatures and increased amounts of salt
B. warm temperatures and increased amounts of pressure
C. cold temperatures and the absence of oxygen
D. cold temperatures and increased amounts of salt
19.Yeast and mould count determination requires-
A. nutrient agar
B. acidified potato glucose agar
C. MacConkey agar
D. nutrient agar
20.The time temperature combination for HTST paterurization of 71.1°C for 15 sec is selected on the basis of
A. Coxiella Burnetii
B. E. coli
C. B. subtilis
D. Coxiella Burnetii
21. Aerobic Colony Count (ACC), is also known as
A. Total viable count (TVC)
B. Aerobic plate count (APC)
C. Standard plate count (SPC)
D. Total viable count (TVC)
22.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. Selenite cystine (SC) broth is replaced by Muller Kauffmann tetrathionate novobiocin broth (MKTTn)
23. Suspected colonies of Staphylococcus aureus when grown on Baird-Parker medium shall show
A. coagulase activity
B. protease activity
C. catalase activity
D. coagulase activity
24. 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. 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
25.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. expected level of contamination of the raw material
26. Examination of the presence / absence of organisms refers to
A. incubation of a food suspension in an enrichment medium followed by inoculation on to a suitable selective medium.
B. incubation of a food suspension in an enrichment medium followed by inoculation on to a non-selective medium.
C. incubation of a food suspension in an enrichment medium
D. incubation of a food suspension in an enrichment medium followed by inoculation on to a suitable selective medium.
27. Plate count of bacteria in foods generally use the plating medium consisting of
A. peptone, yeast extract, glucose, sodium chloride, agar and distilled water
B. yeast extract, glucose, sodium chloride, agar and distilled water
C. peptone, glucose, sodium chloride, agar and distilled water
D. peptone, yeast extract, glucose, sodium chloride, agar and distilled water
28. What are the intrinsic factors for the microbial growth?
A. pH
B. Moisture
C. Oxidation-Reduction Potential
D. pH
29. What are the intrinsic factors for the microbial growth?
A. pH
B. Moisture
C. Oxidation-Reduction Potential
D. pH
30. Carbohydrate content in potato is:
A. 12%
B. 22% Æ´
C. 32%
D. 12%
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