BIOLOGY PRACTICE MCQs

1. Stem is modified into cladode :
(A) Casuarina
(B) Asparagus
(C) Opuntia
(D) Euphorbia 

2. Verticillaster type of inflorescence is found in :
(A) Cotton 
(B) Datura
(C) Lilium 
(D) Ocimum


3. A simple one seeded fruit in which pericarp is fused with seed coat is :
(A) Achene 
(B) Caryopsis
(C) Cypsela 
(D) Nut

4. The portion of DNA which contains information for an entire polypeptide is called :
(A) Cistron 
(B) Muton
(C) Recon 
(D) Operon

5. Bicarpellary, syncarpous ovary with axile placentation is seen in :
(A) Solanaceae
(B) Caesalpinaceae
(C) Asteraceae
(D) Malvaceae

6. Alburnum is also called :
(A) Autumn wood
(B) Heart wood
(C) Sap wood
(D) Spring wood

7. The entry of pollen tube into the ovule through micropyle is called :
(A) Porogamy
(B) Mesogamy
(C) Anisogamy
(D) Chalazogamy

8. Type of pollination in Commelina is :
(A) Chasmogamy
(B) Geitonogamy
(C) Xenogamy
(D) Cleistogamy

9. The process of embryo formation without fertilization is known as :
(A) Apospory
(B) Apogamy
(C) Parthenocarpy
(D) Polyembryony

10. Which of the process Cholodny-Went theory is concerned with ?
(A) Photomorphogenesis
(B) Photoperiodism
(C) Phototropism
(D) Photorespiration

11. The hormone present in the liquid endosperm of coconut is :
(A) Cytokinin 
(B) Gibberellin
(C) Ethylene 
(D) Auxin

12. The phytohormone which influences apical dominance growth is :
(A) IAA 
(B) ABA
(C) GA₃ 
(D) C₂H₄

13. An example of short day plant is :
(A) Wheat
(B) Maize
(C) Chrysanthemum
(D) Radish

14. The ovary after fertilization is converted into :
(A) Embryo 
(B) Endosperm
(C) Fruit 
(D) Seed

15. The molecular formula of Chlorophyll ‘a’ is :
(A) C₅₅H₇₂O₅N₄Mg
(B) C₅₅H₇₀O₅N₄Mg
(C) C₅₅H₇₂O₆N₄Mg
(D) C₅₀H₇₂O₅N₄Mg

16. The first compound that accepts CO₂ during dark phase is :
(A) NADP 
(B) Ferrodoxin
(C) RUBP 
(D) Cytochrome

17. Initiation codon for methionine is :
(A) AAA 
(B) UUU
(C) UAA 
(D) AUG

18. The deficiency of this micronutrient results in little leaf disease :
(A) Copper 
(B) Zinc
(C) Boron 
(D) Iron

19. Kranz anatomy is a morphological diversity in the leaves of :
(A) C_3-plants
(B) C_4-plants
(C) C₃ and C_4-plants
(D) CAM plants

20. Prechilling treatment to break seed dormancy is :
(A) Scarification
(B) Stratification
(C) Impaction
(D) Vernalization

21. The pyruvic acid formed during glycolysis is oxidized to CO₂ and H₂O in a cycle called :
(A) Calvin cycle
(B) Nitrogen cycle
(C) Hill reaction
(D) Krebs cycle

22. Respiratory quotient (RQ) is one in case of :
(A) Fatty acids
(B) Nucleic acids
(C) Carbohydrates
(D) Organic acids

23. An example of free living nitrogen fixing aerobic bacteria is :
(A) Clostridium
(B) Rhizobium
(C) Azotobacter
(D) Rhodospirillum

24. Identify the plant belonging to the Reed-Swamp stage in hydrarch succession :
(A) Juncus 
(B) Sagittaria
(C) Salix 
(D) Trapa

25. A gas produced by paddy fields and connected with global warming is :
(A) CO₂ 
(B) Chlorine
(C) H₂S 
(D) Methane

26. If the strong partner is benefited and the weak partner is damaged, it is known as :
(A) Predation
(B) Allelopathy
(C) Symbiosis
(D) Commensalism

27. Acid rain is mainly caused due to increase in the levels of the gas(es) :
(A) SO₂ only
(B) CO₂ only
(C) SO₂, CO₂
(D) NO₂ and SO₂

28. The flow of energy among various trophic levels of an ecosystem is :
(A) Unidirectional
(B) Bidirectional
(C) Multidirectional
(D) Circular

29. Increase in atmospheric temperature due to CO₂ is called :
(A) Pasteur effect
(B) Green-house effect
(C) Blackman effect
(D) Emerson effect

30. The protective-ozone layer is present in :
(A) Ionosphere
(B) Stratosphere
(C) Troposphere
(D) Lithosphere

31. Decomposition of organic matter is brought about by :
(A) Protozoa
(B) Plants
(C) Micro-organisms
(D) None of these

32. The smallest taxon is called :
(A) Class 
(B) Order
(C) Genus 
(D) Species

33. Which one of the following is the first National Park in India ?
(A) Kanha National Park
(B) Periyar National Park
(C) Corbett National Park
(D) Bandipur National Park

34. Which one of the following is having ssRNA ?
(A) TMV
(B) T_2-bacteriophage
(C) Polio Virus
(D) CMV

35. In Whittaker’s system of classification, prokaryotes are placed in the kingdom :
(A) Protista 
(B) Monera
(C) Plantae 
(D) Animalia

36. Virus consists of :
(A) Nucleic acid and protein
(B) Nucleic acid
(C) Orotein
(D) None of these

37. This substance is present in the cell walls of Gram Positive bacteria only :
(A) Peptidoglycan
(B) Lipopolysaccharides
(C) Teichoic acids
(D) None of these

38. Highest degree of polymorphism is found in :
(A) Protozoa
(B) Cnidaria
(C) Platyhelminthes
(D) Arthropoda

39. Sea mouse belongs to phylum :
(A) Mollusca 
(B) Cnidaria
(C) Arthropoda 
(D) Annelida

40. One of the following animal belongs to Cyclostomata :
(A) Channa 
(B) Loris
(C) Dodo 
(D) Petromyzon

41. An egg laying mammal is :
(A) Delphinus
(B) Macaca
(C) Ornithorhynchus
(D) Macropus

42. In sharks, one of the following is absent :
(A) Claspers
(B) Placoid scales
(C) Cartilaginous endoskeleton
(D) Air bladder

43. The devil fish and sea hare are :
(A) Molluscs
(B) Crustaceans
(C) Coelenterates
(D) Marine fish and mammal

44. Endothelium of blood vessels is made up of :
(A) Simple cuboidal epithelium
(B) Simple squamous epithelium
(C) Simple columnar epithelium
(D) Simple non-ciliated columnar

45. In humans, sphincter of Oddi is associated with the opening of :
(A) Common hepatopancreatic duct
(B) Pyloric stomach
(C) Oesophagus
(D) Colon

46. In human beings, the duration of cardiac cycle is :
(A) 0•08 second
(B) 0•5 second
(C) 0•8 second
(D) 8•0 second

47. In which part of nephron, reabsorption is minimum from filtrate ?
(A) Henle’s loop
(B) Proximal convoluted tubule
(C) Distal convoluted tubule
(D) Collecting duct

48. Which hormone level reaches peak during luteal phase of menstrual cycle ?
(A) Luteinizing hormone
(B) Progesterone
(C) Follicle stimulating hormone
(D) Estrogen

49. The largest subunit of prokaryotic ribosomes is :
(A) 30S 
(B) 40S
(C) 50S 
(D) 60S

50. Which of the following is a part of endomembrane system of eukaryotic cell ?
(A) Peroxisomes
(B) Chloroplasts
(C) Mitochondria
(D) Golgi complexes

51. Inflammation of joints due to accumulation of uric acid crystals is called as :
(A) Gout
(B) Myasthenia gravis
(C) Osteoporosis
(D) Osteomalacia

52. Chromosomes are visible with chromatids at this phase of mitosis :
(A) Interphase 
(B) Prophase
(C) Metaphase 
(D) Anaphase

53. Inheritance of ABO blood grouping is an example of :
(A) Dominance
(B) Codominance
(C) Incomplete dominance
(D) All of these

54. In a dihybrid cross between RRYY and rryy parents, the number of RrYy genotypes in F2 generation will be :
(A) 4 
(B) 3
(C) 2 
(D) 1

55. Identify a 47, + 21 disorder from the following :
(A) Down’s syndrome
(B) Turner’s syndrome
(C) Phenylketonuria
(D) Klinefelter’s syndrome

56. Uracil is present in RNA at the place of :
(A) Adenine 
(B) Guanine
(C) Cytosine 
(D) Thymine

57. Copying genetic information from one strand of DNA into RNA is :
(A) Translation
(B) Transcription
(C) Transformation
(D) Transduction

58. S. L. Miller’s closed flask contained :
(A) CH₄
(B) H₂
(C) NH₃ and Water vapour
(D) All of these

59. Change of frequency of alleles in a population results in evolution is proposed in :
(A) Darwin’s theory
(B) Lamarck’s theory
(C) Hardy-Weinberg principle
(D) De Vries theory

60. One of the following is the vestigial organ in human beings :
(A) Nictitating membrane
(B) Spleen
(C) Femur
(D) Tibia

61. The golden age of reptiles is : 
(A) Cenozoic era
(B) Palaeozoic era
(C) Mesozoic era
(D) Silurian period

62. The theory of use and disuse of organ was proposed by :
(A) Darwin 
(B) Lamarck
(C) De Vries 
(D) Hooker

63. One of the following theories were proposed by Weissman :
(A) Law of inheritance
(B) Theory of inheritance of acquired characters
(C) Theory of natural selection
(D) Theory of germplasm

64. Ontogeny recapitulates phylogeny— 
this theory is called :
(A) Biogenetic law
(B) Law of embryology
(C) Law of acquired characters
(D) Law of Bridges

65. The brain capacity of Homoerectus is :
(A) 800 cc 
(B) 900 cc
(C) 1200 cc 
(D) 1400 cc

66. An example of Innate immunity is :
(A) PMNL-neutrophils
(B) T-lymphocytes
(C) B-lymphocytes
(D) TH cells

67. Cocaine is extracted from :
(A) Erythroxylum coca
(B) Cannabis sativa
(C) Papaver somniferum
(D) Atropa belladonna

68. The enzyme that cuts DNA is :
(A) DNA-polymerase
(B) DNA-ligase
(C) DNA-lyase
(D) Restriction endonuclease

69. In the association between two organisms, if one organism is benefited and the other is not benefited, this relationship is known as :
(A) Symbiotism
(B) Mutualism
(C) Commensalism
(D) Parasitism

70. Opiate narcotics drugs are :
(A) Antianxiety
(B) Analgesic
(C) Hypnotic
(D) Antihistamine

71. The drug useful to increase cardiovascular effects in human beings is :
(A) Cocaine
(B) Barbiturate
(C) Benzodiazetine
(D) Insulin

72. In echolocation, the animal that produces high frequency sounds is :
(A) Monkey 
(B) Butterfly
(C) Squirrel 
(D) Bat

73. Two kingdoms constantly figured in all biological classifications are :
(A) Plantae and Animalia
(B) Monera and Animalia
(C) Protista and Animalia
(D) Protista and Plantae

74. The dioecious animal is :
(A) Liverfluke 
(B) Hookworm
(C) Tapeworm 
(D) Earthworm

75. Comb plates are found in :
(A) Adamsia
(B) Aurelia
(C) Nereis
(D) Pleurobrachia

Answers with Hints:

1. (B) Cladode is a type of phylloclade consisting of one internode only. These are cylindrical (not fleshy) and are mistaken for leaves.
2. (D) Verticillaster is a complex inflorescence found in the Ocimum sanctum, a member of family Labiatae.
3. (B) 4. (A) 5. (A) 6. (C) 7. (A)
8. (D) Cleistogamy is seen in underground flowers of Commelina bengalensis which are small and inconspicuous. This plant also bears chasmogamous blue flowers above.
9. (B) 10. (C) 11. (A) 12. (A)
13. (C) Short day plant (SDP) requires a relatively short day light period (usually 8-10 hrs.) and a continuous dark period of about 14–16 hours for subsequent flowering.
14. (C) 15. (A) 16. (C) 17. (D) 18. (B)
19. (B) Kranz anatomy—It is a typical structure in the leaves of plants that have a C₄–pathway of CO₂fixation. The leaves contain a ring of mesophyll cells, containing a few chloroplasts surroundings a sheath of bundle sheath cells having large chloroplasts involved in the Calvin cycle.
20. (B) 21. (D) 22. (C) 23. (C) 24. (B) 25. (D) 26. (A)
27. (D) Acid rain results from the emission into the atmosphere of various pollutant gases in particular sulphur dioxide (SO₂) and oxides of nitrogen (NO₂), which originate from the burning of fossil fuels and from motor-car exhaust fumes, respectively.
28. (A) 29. (B) 30. (B) 31. (C) 32. (D)
33. (C) The first National Park in India was set up in 1935 in the foot hills of Himalayas and was known as Hailey National Park. It is now known as Corbett National Park.
34. (A) Tobacco mosaic virus (TMV) is a rigid rod-shaped ssRNA-containing virus that causes distortion and blistering of leaves in a wide range of plants.
35. (B) Kingdom Monera includes all prokaryotes. They are basically unicellular but can be mycelial, colonial and filamentous.
36. (A) 37. (A)
38. (B) A striking feature of cnidarians is the high degree of polymorphism often seen in a single species. Two basic types—sessile polyp and free-swimming medusa–occur.
39. (D) 40. (D) 41. (C)
42. (D) Members of Elasmobranchii subclass have no swim (air) bladders.
43. (D) 44. (B) 45. (A) 46. (C) 47. (C) 48. (B) 49. (C)
50. (D) Golgi complex is a part of endomembrane system, which is the system of internal membranes within eukaryotic cells that divide the cell into functional and structural compartments, or organelles.
51. (A) 52. (B)
53. (B) AB blood group in human is an example of codominance in which both the alleles I^A I^B are equally expressed. It means I^A I^B individuals have a phenotype that is essentially a combination of those shown by individuals with A and B blood groups.
54. (A)
55. (A) A small autosome, chromosome 21, added to the normal complement (47, + 21) causes Down syndrome. This is a trisomic for chromosome 21.
56. (D) 57. (B) 58. (D) 59. (C) 60. (A)
61. (C) The Mesozoic era is often known as the “Golden Age of Reptiles” as these animals, which included the dinosaurs and ichthyosaurs, became dominant lifeform.
62. (B) 63. (D) 64. (A) 65. (B) 66. (A) 67. (A)
68. (D) Restriction enzyme is a class of nucleases originally extracted from the E . coli. Type I restriction enzymes bind to a recognition site of duplex DNA, travel along the molecule and cleave one strand only. Type II cleaves the duplex at specific target site at or near the binding site.
69. (C) 70. (B) 71. (A) 72. (C) 73. (A) 74. (B) 75. (D)

INTELLIGENCE BUREAU ACIO EXAM SOLVED PAPER

( EXAM HELD ON: 10-07-2011)

1. How many languages and dialects are spoken by people all over the world?
   
   1. 6,000
   2. 9,000
   3. 4,000
   4. 1,000
2. Approximately, how many people speak Chinese language?
   
   1. 1 billion
   2. 1 million
   3. 1 lakh
   4. 1 thousand
3. The language with the richest vocabulary is:
   
   1. Hindi
   2. French
   3. English
   4. German
4. English Language have more than ?? words:
   
   1. 4,50,000
   2. 45,000
   3. 4,500
   4. 450
5. The oldest Indian language is:
   
   1. Telugu
   2. Hindu
   3. Tamil
   4. Punjabi
6. Which book has been printed in the maximum number of languages and these scripts?
   
   1. The Bible
   2. Hiraka Sutra
   3. The Super Book
   4. None of these
7. The only religious book ever printed in a shorthand scripts is:
   
   1. The Ramayana
   2. The Mahabharata
   3. The bible
   4. Guru Granth Sahib
8. The oldest printed work in the world, which dates back to AD 868 is:
   
   1. The Bible
   2. The Hirake Sutra
   3. The Ramayana
   4. The Mahabharata
9. The largest book, the super book, is ?? and weight is ??
   
   1. 270 cm, 300 cm, 252 kg.
   2. 100 cm, 110 cm, 100 kg.
   3. 200 cm, 100 cm, 60 kg.
   4. None of these
10. Les Hommes de bonne volonté is the:
    
    1. Longest novel ever published
    2. Shortest novel every published
    3. The oldest novel
    4. None of these
11. The author of the play/book ?Ratnawali? is:
    
    1. Tulsidas
    2. Kalidas
    3. Harsha Vardhan
    4. Prem Chand
12. Which of the following in the book/play written by Maithili Sharan Gupt?
    
    1. Saket
    2. Satyartha Prakash
    3. Shakuntala
    4. Savitri
13. The book ?Satyartha Prakash? was written by:
    
    1. Swami Dayanand
    2. Swami Vivekanand
    3. Sarojini Naidu
    4. Kalidas
14. The play/book ?Shakuntala? was written by:
    
    1. Maithili Sharan gupt
    2. Swami Dayanand
    3. Kalidas
    4. Tulsidas
15. Which of the following is the author of ?Song of India, The?:
    
    1. Firdausi
    2. Sarojini Naidu
    3. Lala Lajpat Rai
    4. Sri Aurobindo Ghosh
16. The author of the book ?Time machine? is:
    
    1. Lewis Carroll
    2. Robert Louis Stevenson
    3. Charles Lamb
    4. H.G. Wells
17. Which of the following book was written by Tulsidas:
    
    1. Vinay Patrika
    2. Ramcharitmanas
    3. Both (a) and (b)
    4. Yashodhara
18. The book ?Vish Vriksha? was written by:
    
    1. Bankimchandra Chatterjee
    2. Annie Basant
    3. Tulsidas
    4. Kalidas
19. The book ?We Indians? was written by:
    
    1. H.G. Wells
    2. Khushwant Singh
    3. James Jeans
    4. Thomas Moore
20. Which of he following is he author of play/book ?Yashodhara?:
    
    1. Maithili Sharan Gupt
    2. Khushwant Singh
    3. Bankimchandra Chatterjee
    4. Sarojini Naidu
21. Dhyan Chand was:
    
    1. A great hockey player
    2. Captained he Indian hockey team which won a gold medal in 1936 Berlin Olympics
    3. Scored 101 goals at the Olympic games and 300 goals in the international matches.
    4. All the statements are correct
22. Who developed the small pox vaccination?
    
    1. Eduard Jenner
    2. Alexander Fleming
    3. Albert Einstein
    4. None of these
23. Euclid was:
    
    1. Greek mathematician
    2. Contributor to the use of deductive principles of logic as the basis of geometry
    3. Propounded the geometrical theosems
    4. All the statements are correct
24. Fa-hien was:
    
    1. The first Buddhist pilgrim of China to visit India during the reign of Chandragupta Vikramaditya
    2. The discover of Puerto Rico and Jamaica
    3. The first Buddhist pilgrim of India to visit China
    4. None of these
25. Firdausi was:
    
    1. A person poet
    2. Well known for his epic ?Sharnama?
    3. Both are correct
    4. None of these
26. Who is also known as the ?Lady with the Lamp??
    
    1. Florence Nightingale
    2. Sarojini Naidu
    3. Rani Laxmibai
    4. Bachendri Pal
27. Gabriel Daniel Fahrenheit was:
    
    1. A German Physicist
    2. Developed the mercury thermometer in 1714
    3. Devised temperature scale
    4. All are correct
28. Galileo was an Italian astronomer who:
    
    1. Developed the telescope
    2. Discovered 4 satellites of Jupiter
    3. Discovered that the movement of the pendulum produces a regular time measurement.
    4. All are correct
29. Who is known as the father of English poetry?
    
    1. Geoffrey Chaucer
    2. John Milton
    3. John Keats
    4. None of these
30. The American General who led the revolt against the British & declared American independence was:
    
    1. George Washington
    2. Bill Clinton
    3. George Bush
    4. None of these
31. Marco Polo
    
    1. Discovered Greenland
    2. Traveled three China, India and other parts of Asia
    3. Traveled round the cape of Good Hope
    4. Discovered Canada
32. Who landed on the mainland of South America for the First time?
    
    1. Discovered Greenland
    2. Landed on the mainland of south America
    3. Discovered the sea route from Europe to India.
    4. None of these
33. Who was first to sail sound the strait, reached the Philippines and named the Pacific Ocean?
    
    1. Ferdinand Magelion
    2. Jacques Carter
    3. William Janszoom
    4. Vasco da Gama
34. Who discovered Australia?
    
    1. Eric the Red
    2. Leif Ericsson
    3. William Janszoom
    4. None of these
35. Who located the magnetic pole?
    
    1. Sir James Clark
    2. Rear Admiral
    3. Sir John Ross
    4. All the above
36. Who was first to reach the South Pole?
    
    1. Rear Admiral
    2. Capt. Amundsen
    3. Capt. R. E. Scett
    4. Sir Edmund Hillary
37. Who was the first to cross the Antarctic?
    
    1. Sir Vivian Fuchs & sir Edmund Hillary
    2. Maj. Yuri Gagarin and Maj. Gherman Titor
    3. Capt. R. E. Scott
    4. All of these
38. Who were the first to journey into space?
    
    1. Maj. Yori Gagarin and maj. Gherman Titor from Russia
    2. Comm. Grissom and Col john Glenn from America
    3. Both are correct
    4. None of these
39. Who was the first man to ?Walk? in space?
    
    1. Col. Leonor from Russia
    2. Major White from America
    3. Both of these
    4. None of these
40. Who were the first to circle the moon?
    
    1. Frank boreman, Bill Anders and Jim Lovell
    2. Neil Armstrong and Edwin Aldrin
    3. Charles Conrad and Alan Bean
    4. None of these
41. ?Arena? is the special name for playground of:
    
    1. Cricket
    2. Lawn Tennis
    3. Wrestling
    4. Skating
42. The national sport of Canada is:
    
    1. Tennis and cricket
    2. Lacrosse
    3. Judo
    4. Rugby and Football
43. Badminton is the national sport at:
    
    1. Malaysia
    2. Scotland
    3. China
    4. Former soviet Union
44. Where is the Vallabhbhai Patel stadium located?
    
    1. Kolkata
    2. Mumbai
    3. Chennai
    4. Delhi
45. Where is the sports stadium, Green Park, located?
    
    1. Kanpur
    2. Jamshedpur
    3. Cuttack
    4. Patiala
46. For which of the following disciplines in Nobel Prize awarded?
    
    1. Physics and chemistry
    2. Physiology or Medicine
    3. Literature, Peace and Economics
    4. All the above
47. On which date is Nobel Prize awarded?
    
    1. December 10
    2. January 10
    3. April 10
    4. July 10
48. The Royal Swedish Academy of Sciences, awarded the Noble Prize in:
    
    1. Physics
    2. Economics
    3. Chemistry
    4. (a) and (c)
49. The committee of the Norwegian Parliament awards the prize for:
    
    1. Economics
    2. Peace
    3. Medicine
    4. Literature
50. Dr. Linus Carl Pauling is the only person to have won two Nobel Prizes individually for:
    
    1. Chemistry in 1954, peace prize in 1962
    2. Peace prize in 1954, Chemistry in 1962
    3. Physics in 154, Medicine in 1962
    4. Medicine in 1954, Physics in 1962

Answers:

1. b	2. a	3. c	4. a	5. c
6. a	7. c	8. b	9. a	10. a
11. c	12. a	13. a	14. c	15. b
16. d	17. c	18. a	19. b	20. a
21. d	22. a	23. d	24. a	25. c
26. a	27. d	28. d	29. a	30. a
31. b	32. b	33. a	34. c	35. d
36. b	37. a	38. c	39. c	40. a
41. c	42. b	43. a	44. b	45. a
46. d	47. a	48. d	49. b	50. a

Essay writing Topics:(Not more than 400 words)

 

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2) Security threats in India

3) Cultural Diversity In India

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