1. Which of the following characteristic of the Rotavirus was important for the construction of the Rotashield vaccine?
(A). The possession of a segmented RNA genome
(B). A limited number of capsule types
(C). The ability of monkey Rotavirus strains to cause serious illness (diarrhea) in human beings
(D). The ability of the Rotavirus to be transmitted faster
Correct Answer: A
2. The equation used to obtain bacterial population by binary fission is
(A). N = No2n
(B). log N/No = (0.3010) n
(C). log(N/No) = nlog 2
(D). All of these
Correct Answer: D
3. Chemical precipitation of phosphorus is
(A). primary treatment
(B). secondary treatment
(C). tertiary treatment
(D). both (a) and (b)
Correct Answer: C
4. A single large central vacuole occurs in
(A). mature animal cell
(B). mature plant cell
(C). developing animal cell
(D). developing plant cell
Correct Answer: B
5. What is the usual sequence of a Pribnow box?
(A). AUAUA
(B). TATAAT
(C). UUUUU
(D). TTGACA
Correct Answer: B
6. Which of the phage types of Mycobacterium tuberculosis occurs most frequently in India?
(A). Type A
(B). Type B
(C). Type C
(D). Type I
Correct Answer: D
7. The generation of excitation-contraction coupling involves all the following events except :
(A). Generation of end-plate potential
(B). Release of calcium from troponin
(C). Formation of cross-linkages between actin and myosin
(D). Hydrolysis of ATP to ADP
Correct Answer: B
8. Which is not a function of IgA?
(A). Protect mucosal surfaces
(B). Fix complement
(C). Protect eyes
(D). Agglutinate antigen
Correct Answer: B
9. Virus was discovered by whom?
(A). Stanley
(B). Ivanowsky
(C). Herelle
(D). Beijerinek
Correct Answer: B
10. Chemotherapeutic agents must
(A). prevent/destroy the activity of a parasite
(B). leave unaltered the host's natural defense mechanisms
(C). be able to come in contact with the parasite by penetrating the cells
(D). all of the above
Correct Answer: D
11. The beet molasses is pretreated with __________ to reduce great quantity of trace metals.
(A). ferrocyanide orferricyanide
(B). ethylenediamine tetrachloro acetic acid
(C). hydrochloric acid
(D). sulphuric acid
Correct Answer: A
12. Which of these is a symptom of vitamin A deficiency?
(A). Osteoporosis
(B). Impaired taste perception
(C). Blindness
(D). Impaired blood clotting
Correct Answer: C
13. Which of the following does not cause wound infection following exposure to sea water or infected shellfish?
(A). Vibrio vulnificus
(B). V. alginolyticus
(C). V. cholerae
(D). Aeromonas
Correct Answer: C
14. Commercial sugarcane is heterozygons with germplasm from
(A). 1-3 Saccharum species
(B). 3-5 Saccharum species
(C). 5-7 Saccharum species
(D). 7-9 Saccharum species
Correct Answer: B
15. Out of A-T, G-C pairing, bases of DNA may exist in alternate valency state owing to arrangement called
(A). Tautomerisational mutation
(B). Analogue substitution
(C). Point mutation
(D). Frameshift mutation
Correct Answer: A
16. The next to last step in peptidoglycan biosynthesis is
(A). synthesis of the NAM-peptide subunit
(B). removal of the subunit from bactoprenol
(C). linking the sugar of the disaccharide-peptide unit to the growing peptidoglycan chain
(D). cross-linking the peptide side chains of peptidoglycan
Correct Answer: C
17. Gametophyte is the dominant phase in the lifecycle of ________.
(A). Hibiscus
(B). Nephrolepis
(C). Cycas
(D). Riccia
Correct Answer: D
18. When was the genetic code completed?
(A). 1958
(B). 1952
(C). 1966
(D). 1968
Correct Answer: C
19. Aristotle’s Lantern occurs in—
(A). Asteroidea
(B). Echinoidea
(C). Holothuroidea
(D). Crinoidea
Correct Answer: B
20. Who coined the word enzyme first?
(A). Kuhne
(B). Pasteur
(C). Liebig
(D). Buchner
Correct Answer: A
21. Which one of the following human cells do not contain mitochondria?
(A). Nerve cell
(B). Red blood cell
(C). Liver cell
(D). White blood cell
Correct Answer: B
22. Which one of the following is NOT a method of soil conservation?
(A). Overgrazing
(B). Mulching
(C). Crop rotation
(D). Strip cropping
Correct Answer: A
23. Which of the following is not a semi synthetic chemotherapeutic agent?
(A). Ampicillin
(B). Carbenicillin
(C). Penicillin
(D). Sulfonamide
Correct Answer: C
24. In one iron-metalloflavoprotein, the iron is present as a
(A). heme-protein
(B). nonheme type
(C). both (a) and (b)
(D). flavin moiety
Correct Answer: A
25. Microbially produced streptokinase is used to
(A). remove spots from laundry products
(B). dissolve clots for patients with coronary blockages
(C). clarify fruit juice
(D). breakdown starch molecules into smaller sugars
Correct Answer: B
26. Which of the following specimens contain/s hepatitis B virus in an infected person?
(A). Blood
(B). Semen
(C). Saliva
(D). All of these
Correct Answer: D
27. Why high concentration of sugars are not employed in the fermentation medium?
(A). Calcium lactate is not produced
(B). Calcium lactate crystallizes from the medium and slows down the process of fermentation
(C). High sugar concentration itself crystallizes
(D). None of the above
Correct Answer: B
28. The morphological nature of rhizophore of Selaginella is-
(A). Root like
(B). Stem like
(C). Both root and stem like
(D). Rhizoid like
Correct Answer: C
29. An organism is completely dependent on atmospheric O2 for growth. This organism is
(A). osmotolerant
(B). acidophile
(C). facultative anaerobe
(D). obligate aerobe
Correct Answer: D
30. A brown color in milk may result from
(A). Pseudomonas putrefaciens
(B). the enzymatic oxidation of tyrosine by P. fluorescens
(C). both (a) and (b)
(D). S.marcescens
Correct Answer: C
31. Marfan's syndrome is thought to be a mutation affecting
(A). hemoglobin synthesis
(B). collagen synthesis
(C). metabolism of homogentisic acid
(D). insufficient thyroid production
Correct Answer: B
32. The conversion of molecular nitrogen into ammonia is known as
(A). nitrification
(B). denitrification
(C). nitrogen fixation
(D). ammonification
Correct Answer: C
33. Which of the following types of Clostridium perfringens produces alpha toxin most abundantly?
(A). Type A
(B). Type B
(C). Type C
(D). Type D
Correct Answer: A
34. Which substrate is used in the fermentation of citric acid?
(A). Beet molasses
(B). Sucrose
(C). Starch hydrolysate
(D). All of these
Correct Answer: D
35. Which of the following divisions of fungi produce uniflagellated zoospores?
(A). Ascomycota
(B). Chytridiomycota
(C). Oomycota
(D). Zygomycota
Correct Answer: B
36. Peptidoglycan is a complex consisting of
(A). oligo-saccharide and protein
(B). polysaccharide and protein
(C). mono-saccharide and protein
(D). aminoacid and carbohydrate
Correct Answer: A
37. The rate limiting step in the movement of oxygen from the gas phase in a bubble to the cell is the movement of oxygen molecules through
(A). gas-liquid interface
(B). bubble boundary layer
(C). bulk liquid
(D). gas phase
Correct Answer: B
38. Main reason for using baffles in stirred tank reactors are
(A). baffles permit turbulence conditions to arise at low stirrer speed
(B). baffles will allow axial mixing to occur even with radial flow impellers
(C). both (a) and (b)
(D). baffles prevent turbulent conditions in stirred tank reactors
Correct Answer: C
39. For the selection of endospore-forming bacteria, a mixed culture can be heated at
(A). 80°C for 10 minutes
(B). 70°C for 10 minutes
(C). 60°C for 10 minutes
(D). 90°C for 10 minutes
Correct Answer: A
40. Some organisms can use reduced inorganic compounds as electron donors and are termed as
(A). lithotrophs
(B). phototrophs
(C). chemotrophs
(D). photo-organotrophs
Correct Answer: A
41. Addison disease is caused by lack of
(A). adrenaline
(B). insulin
(C). thyroxine
(D). pepsin
Correct Answer: C
42. Which of the following statement defines a replicon?
(A). A DNA molecule that encodes pili for conjugation
(B). A DNA molecule that is able to replicate and be maintained
(C). A DNA template which is used in transcription
(D). The enzyme responsible for transposition
Correct Answer: B
43. When composite transposons are formed
(A). a small deletion occurs in the transposase gene of an IS element
(B). a small deletion occurs in the transposase gene of an IS element and plasmid is integrated
(C). an IS element integrates with another IS element with the help of a plasmid
(D). two IS elements integrate into a chromosome with only a small distance separating them
Correct Answer: D
44. Yeast are most likely to grow in frozen fruits during
(A). slow thawing
(B). refrigeration
(C). ambient temperature
(D). none of these
Correct Answer: A
45. Which function will be lost due to damage of occipital lobe?
(A). Hearing
(B). Speech
(C). Vision
(D). Memory
Correct Answer: C
46. Which of the following is not classified as an axial flow impeller?
(A). A propeller
(B). A marine impeller
(C). A Rushton turbine
(D). A hydrofoil impeller
Correct Answer: C
47. Anthracnose is a defect which can be observed as
(A). spotting of leaves
(B). spotting of seedpods
(C). spotting of fruits
(D). all of these
Correct Answer: D
48. What is the ELISA test intended to measure?
(A). Antibody to HIV only
(B). Antigen to HIV only
(C). Presence of free, circulating virus in the patient
(D). Antibodies directed against HLA molecules
Correct Answer: A
49. Peptidoglycan is found only in the bacterial
(A). cell membrane
(B). glycocalyx
(C). cell wall
(D). spore
Correct Answer: C
50. Neurospora is used as genetic material because
(A). it has short life cycle of 10 days.
(B). the product of single meiosis can be easily analyzed.
(C). meiotic products are linearly arranged in the form of ordered trends.
(D). of a diploid fungus.
Correct Answer: B
51. Which of the following modified amino acid is used at the starting of most prokaryotic proteins?
(A). N-formylserine
(B). N-formylmethionine
(C). N-formylleucine
(D). N-formylalanine
Correct Answer: B
52. Ptyalin is an enzyme produced in the
(A). salivary glands
(B). pituitary glands
(C). thyroid glands
(D). pancreas
Correct Answer: A
53. What is/are true about heart wood?
A. It does not help in water conduction.
B. It is also called alburnum.
C. It is dark in colour but very soft.
D. It has tracheary elements which are filled with tannin, resin, etc.
(A). A and D
(B). B and D
(C). A, B and C
(D). B, C and D
Correct Answer: D
54. Random amplified polymorphic DNA (RAPD) is a method that
(A). stimulate production of sense RNA to compensate
(B). activate the expression of all genes in a biochemical pathway
(C). eliminate the expression of all genes in a biochemical pathway
(D). reveals intra-specific variation and diversity between species
Correct Answer: D
55. Lag phase is also known as
(A). period of initial adjustment
(B). transitional period
(C). generation time
(D). none of these
Correct Answer: A
56. The production of acetic acid from ethanol is an
(A). anaerobic process
(B). aerobic process
(C). a combination of both
(D). none of the above
Correct Answer: B
57. In a tissue culture media, the resource of the phytohormone is
(A). Agar agar
(B). Glucose
(C). Micronutrients
(D). Coconut milk
Correct Answer: D
58. Which were the investigators lived at the same time?
(A). Koch and Pasteur
(B). Darwin and Woese
(C). Van Leeuenhoek and Ricketts
(D). Berg and Hooke
Correct Answer: A
59. Pick the mammal with true placenta
(A). Kangaroo
(B). Echidna
(C). Platypus
(D). Mongoose
Correct Answer: D
60. Most of the endangered species are the victims of
(A). Habitat destruction
(B). Over-hunting
(C). Acid rain
(D). Competition with introduced species
Correct Answer: A
61. The defective satellite virus is
(A). hepatitis B
(B). hepatitis C
(C). hepatitis D
(D). hepatitis A
Correct Answer: C
62. E.coli ACP has its molecular weight as around
(A). 9000
(B). 19000
(C). 39000
(D). 90,000
Correct Answer: A
63. Antibiotics are drugs used for the cure of —
(A). Bacterial diseases
(B). Cancer
(C). Malaria
(D). Nervous disorders
Correct Answer: A
64. Which of the following is not a metal?
(A). Sodium
(B). Silicon
(C). Calcium
(D). Mercury
Correct Answer: A
65. When the height of an aerated bioreactor is increased, it will increase the oxygen transfer rate by
(A). increasing the partial pressure of oxygen at the base of the reactor
(B). decreasing the saturation concentration of oxygen in the reactor
(C). decreasing the gas-holdup
(D). all of the above
Correct Answer: A
66. BT brinjal is an example of transgenic crops. In this, BT refers to
(A). Bacillus tuberculosis
(B). Biotechnology
(C). Betacarotene
(D). Bacillus thuringiensis
Correct Answer: D
67. Classical noncompetitive inhibition is obtained only under
(A). slow equilibrium conditions
(B). moderate equilibrium conditions
(C). rapid equilibrium conditions
(D). non-equilibrium conditions
Correct Answer: C
68. Slime molds differ from the moldy fungi
(A). in their mode of nutrition: phagocytosis for the slime molds; absorptive heterotroph for moldy fungi
(B). in that the moldy fungi produce amoeboid or flagellated cells and the slime molds do not
(C). Both (a) and (b)
(D). none of the above
Correct Answer: A
69. Molar absorbtivities of compounds exhibiting charge transfer absorption are
(A). small
(B). moderate
(C). large
(D). none of these
Correct Answer: C
70. A pandemic disease is
(A). Amoebic dysentery
(B). Filaria
(C). Influenza
(D). hepatitis
Correct Answer: C
71. In anaerobic respiration, the final electron acceptor can be
(A). oxygen
(B). nitrate
(C). pyruvate
(D). acetyl-CoA
Correct Answer: B
72. The bacteria which is microaerophilic on primary isolation, is
(A). M fortuitum
(B). Mycobacterium tuberculosis
(C). M bovis
(D). none of these
Correct Answer: C
73. Because DNA is a highly charged polyanion, its stability to heat denaturation
(A). does not depend on hydrophobic interactions
(B). increases with increasing salt
(C). is independent of G - C content
(D). decreases with increasing salt
Correct Answer: B
74. During catabolism, only about 40% of the energy available from oxidizing glucose is used to synthesize ATP. Remaining 60%
(A). is lost as heat
(B). is used to reduce NADP
(C). remains in the products of metabolism
(D). is stored as fat.
Correct Answer: A
75. The offspring produced from a marriage have only O or A blood groups. Of the genotypes given below, the possible genotypes of the parents would be
(A). IOIO and IOIO
(B). IAIA and IOIO
(C). IAIO and IOIO
(D). IAIA and IAIO
Correct Answer: C
76. Transmission of hepatitis G virus is
(A). Parenterally
(B). Sexually
(C). Both (a) and (b)
(D). None of these
Correct Answer: C
77. Which of the following hormones is a steroid?
(A). Estrogen
(B). Insulin
(C). Glucagon
(D). Thyroxine
Correct Answer: A
78. Intracytoplasmic inclusion bodies are found in cells infected with
(A). Rabies virus
(B). Vaccinia virus
(C). Fowlpox virus
(D). all of these
Correct Answer: D
79. The diameter of a thin wire is generally measured by
(A). meter scale
(B). centimeter scale
(C). screw gauge
(D). Spherometer
Correct Answer: B
80. Implicit factors
(A). depend on developing microflora
(B). can be synergistic
(C). both (a) and (b)
(D). none of the above
Correct Answer: C
81. Which of the following does not produce oxygen as a product of photosynthesis?
(A). Oak trees
(B). Purple sulfur bacteria
(C). Cyanobacteria
(D). Phytoplankton
Correct Answer: B
82.
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). C. botulinum
Correct Answer: A
83. Ropiness caused by Enterobacter usually is
(A). worse at the middle of the milk
(B). worse at the bottom of the milk
(C). worse near the top of the milk
(D). all of these
Correct Answer: C
84. Precipitation reaction is relatively less sensitive for the detection of
(A). antigens
(B). antigen-antibody complexes
(C). antibodies
(D). complement
Correct Answer: C
85. Which of the following is NOT correctly matched?
(A). Sycon – Canal system
(B). Star fish – Radial symmetry
(C). Ascaris – Flame cell
(D). Prawn – Haemocoel
Correct Answer: C
86. Which of the following is used only in life-threatening situations when no other drug is adequate?
(A). Penicillin
(B). Tetracycline
(C). Chloramphenicol
(D). Streptomycin
Correct Answer: C
87. Which spore is on a club and results from the fusion of two nuclei from different strains of the same fungi?
(A). Ascospore
(B). Basidiospore
(C). Blastospore
(D). Conidiospore
Correct Answer: B
88. When an enzyme is functioning at Vmax, the rate of the reaction is limited by
(A). the number of collisions between enzyme and substrate
(B). the number of substrate molecules in the reaction
(C). the concentration of the substrate
(D). the rate at which the enzyme can convert substrate to product
Correct Answer: D
89. The species of animals which is most susceptible to rabies infection is
(A). dog
(B). cat
(C). fowl
(D). cow
Correct Answer: B
90. The “Repeating Unit” of glycogen is
(A). Fructose
(B). Mannose
(C). Glucose
(D). Galactose
Correct Answer: C
91. Plant viruses penetrate host cells through transient ores called
(A). ectodesmata
(B). .endodesmata
(C). cytodesmata
(D). protodesmata
Correct Answer: A
92. Respiratory enzymes are present in the following organelle :
(A). Peroxysome
(B). Chloroplast
(C). Mitochondrion
(D). Lysosome
Correct Answer: C
93. Members of all of the following genera of bacteria typically are found in a maturing Winogradsky column except
(A). Clostridium
(B). Rhodospirillum
(C). Chlorobium
(D). Escherichia
Correct Answer: D
94. When a virus enters a cell but does not replicate immediately, the situation is called
(A). lysogeny
(B). fermentation
(C). symbiosis
(D). synergism
Correct Answer: A
95. The cocci which forms a chain is
(A). Streptococci
(B). diplococci
(C). Staphylococci
(D). Tetracocci
Correct Answer: A
96. Intestinal bacteria can grow in the presence of __________ whereas nonintestinal bacteria are usually inhibited.
(A). bile salts
(B). low concentration of various dyes
(C). sugars
(D). low levels of nitrogen
Correct Answer: A
97. The template for PCR is
(A). RNA
(B). single stranded DNA
(C). double stranded DNA
(D). none of these
Correct Answer: C
98. Which of the following test(s) may establish retrospective diagnosis of streptococcal infection?
(A). Anti-DNase B test
(B). ASO test
(C). Streptozyme test
(D). All of these
Correct Answer: D
99. Diabetes is caused due to lack of which of the following ?
(A). Testasterone
(B). Insulin
(C). Vitamin D
(D). Calcium
Correct Answer: B
100. Which of the following is an abiotic elicitors?
(A). UV irradiation
(B). Osmotic shock
(C). Heavy metal ions
(D). All of these
Correct Answer: D