Living World MCQs Part I

1) Serendipity refers to
a) Animal behaviour
b) Chance discovery
c) Culturing bacteria
d) Management of farms and the science of crop production

2) Fleming’s bacterial
culture during the discovery of penicillin was

a) Staphylococcus
b) Streptococcus
c) Penicillium
d) Aspergillus

3) In a scientific study observation is followed by
a) Repeated observation
b) Hypothesis
c) Preliminary examination
d) Identification of a problem

4) Which is not based on predictive generalisation or repeatable experimentation?
a) Hypothesis
b) Law
c) Principle
d) Theory

5) Which of the following is a correct statement regarding a control experiment?
a) An experiment under fully controlled conditions
b) an experiment in which all the parameters are recorded
c) an experiment without the material under test
d) an experiment with optimum material under test

6) The study of living activities and function is called
a) Cytology
b) Genetics
c) Teleology
d) Physiology

7) A hypothesis is a/an
a) Predicative generalization
b) Unexpected finding
c) Reasoned guess
d) Universal generalization

8) Which one of the following is a theory ?
a) Not supported by experiment
b) Supported by experiment
c) Based on observation
d) Unable to foretell the result of an experiment

9) The quantum of unexplained phenomena is much higher in
a) Physics
b) Biology
c) Chemistry
d) Geology

10) The branch of biology which explores the possibility of extra-terrestrial
life forms is known as

a) Cryptobiology
b) Chronobiology
c) Bionics
d) Exobiology

11) The scientific method was originated by
a) Bacon
b) Darwin
c) Linnaeus
d) Hugo de Vries

12) Induction is involved in
a) Developing hypotheses
b) Testing a hypothesis
c) discovering correlation among different facts
d) None of the above

13) Biology has arisen as a branch out of human curiosity about living beings combined with need to survive. It is a science of exceptions because
a) It deals with living organisms which show variations and adaptations
b) It deals with a set of laws
c) Organisms live in different area
d) None of the above

14) One area which is not subject to scientific analysis is
a) Human intelligence
b) Animal behaviour
c) Origin of life
d) Human faith

15) The most important contribution of science to humanity is
a) Spaceship
b) Tools and techniques
c) Efficient machines
d) Development of a scientific attitude

16) Living organisms share the following features except that they
a) Are formed to protoplasm
b) Can make their own food
c) Respire
d) Reproduce

17) Biology is a science of exceptions. Which of the following is an example of this?
a) DNA is the genetic material
b) Roots of mangrove plants grow away from gravity
c) Birds can fly
d) None of the above

18) One of the following disciplines is not closely related to biology:
a) Teleology
b) Paleontology
c) Meteorology
d) Genealogy

19) Which one is not a scientific method ?
a) Observation
b) Making a hypothesis
c) Teleology
d) Theorizing

20) Which is a science of exceptions?
a) Physics
b) Chemistry
c) Mathematics
d) Biology

21) Point out the statement that does not depict the similarity between living and non-living:
a) Both are made up of the same elements
b) Both obey the physical laws of gravitation, action and reaction, etc.
c) Both present a unique and characteristic level of organization
d) Both can change with time

22) Which of the following is characteristic of living beings?
a) Growth and development
b) Growth and reproduction
c) Responsiveness and adaptation
d) All of these

23) Nature’s prime balancing and life supporting mechanism operates between
a) Photosynthesis and respiration
b) Digestion, assimilation of food and respiration
c) Photosynthesis and ascent of sap
d) Transpiration and ascent of sap

24) A living system has a continuous inflow of chemical energy in the form of food and outflow in the form of removal of waste. Such a system is called a/an
a) Open system
b) Closed system
c) Steady state
d) Entropy

25) Which of the following are the major characteristics of living beings?
a) Metabolism and homeostasis
b) Metabolism, replication and homeostasis
c) Homeostasis and replication
d) Metabolism and replication

26) Which of the following is the most accurate definition of life?
a) Life is an abstract concept
b) Life is a concrete concept
c) Life is a particular form of organisation
d) Life is an expression of energy changes and exchange of matter

27) The organisation of an organism at different levels is regulated by
a) Equilibrium and change
b) Interaction
c) Coaction
d) Aggregation

28) A living organism in considered to be in a steady state. It means
a) The rate of input of matter and energy exceeds that of output
b) The rate of input of energy and matter equals that of the output
c) The rate of output of energy is greater than that of input
d) The rate of input of energy is greater than that of output

29) During physiological activity in a living organism energy is
a) Transformed
b) Consumed
c) Transferred
d) All the above

30) Homeostasis operates at
a) Organ level
b) All levels of the living hierarchy
c) Individual level
d) Organismic level

31) Viruses are unique because
a) They have DNA/RNA
b) They have a machinery of their own
c) They survive as parasites inside a living cell
d) They cannot be cultured in an artificial medium without a living cell

32) Which of the following statements appear to be scientifically sound?
a) An organism dies because all its cells die
b) An organism dies because organisms can be born again.
c) An organism dies because death is a natural part of the life cycle
d) An organism dies because otherwise the earth would become too crowded

33) In a spontaneous reaction, the free energy of a system
a) Increases
b) Decreases
c) Becomes equal to zero
d) Remains unchanged

34) The maintenance of favorable internal conditions despite changes in the environment through a self-regulating mechanism is called
a) Serendipity
b) Entropy
c) Homeostasis
d) Adaptability

35) Which eighteenth century scientist is credited with overthrowing the phlogiston theory and establishing the actual nature of chemical oxidation or combustion and their similarity to respiration in animals?
a) Priestley
b) Lavoisier
c) Van Helmont
d) Mendel

36) The term homeostasis was first coined by
a) W.B. Cannon
b) C.Bernard
c) J.Huxley
d) L. Pasteur

37) Homeostasis involves which major organs?
a) Brain
b) Kidney and liver
c) Skin
d) All the above

38) Homeostasis is well defined in
a) Birds and mammals
b) Fishes and amphibians
c) Reptiles and amphibians
d) All the above

39) Metabolism is defined as
a) The changes which result in the degradation of complex substances in an organism
b) The changes that lead to growth of an organism
c) The changes which lead to the formation of complex substances
d) The sum total of all the chemical changes that occur in an organism

40) Homeostatic mechanisms include
a) Thermal response
b) Behavioral response
c) Osmoregulatory response
d) All the above

41) Homeostasis occurs in
a) All organisms
b) Multicellular organisms only
c) Plants and animals both
d) Birds and mammals

42) What represents the steady state?
a) Elimination of waste material and energy
b) Intake of food material , oxygen and water
c) Intake of materials and elimination of waste products including energy
d) None of the above

43) Randomness created due to loss of energy is called
a) Equilibrium entropy
b) Decreased entropy
c) Increased entropy
d) None of the above

44) Metabolism is the process of
a) Excretion of nitrogenous wastes
b) Formation of sperm and spermatogonia
c) Absorption of digestive food materials
d) Various energy exchanges in the cell

45) Homeostasis is the phenomenon of
a) Self- perpetuation
b) Self-regulation
c) Adaptation
d) Defence

46) The lowest level of organization in an organism is
a) Atomic
b) Molecular
c) Cellular
d) Population

47) Automatic healing of minor injury is the example of
a) Regeneration
b) Reproduction
c) Homeostasis
d) None of these

48) The central dogma in biology includes
a) Transcription
b) Translation
c) Both transcription and translation
d) None of these

49) Metabolism refers to
a) Synthesis reactions
b) Breakdown reactions
c) Both A and B
d) None above

50) Energy is required by the cells for
a) Overcoming entropy
b) Physiological activities
c) Biosynthetic activities
d) All the above

51) An exergonic reaction is
a) A spontaneous reaction in which energy is given off
b) An uphill reaction requiring input of energy
c) An oxidation reaction
d) An anaerobic reaction

52) Which of the following is a problem linked to scientific progress?
a) Pollution
b) Population explosion
c) Female foeticide
d) All of these

53) The most important characteristic of a living organism is
a) Protoplasm
b) Movement
c) Reproduction
d) Growth

54) Which of the following process is the most appropriate to describe a living organism?
a) Cell division and growth
b) Gene pool
c) To reproduce and increase its gene pool
d) All of the above

55) Homeostasis refers to
a) Positive and negative feedback
b) Positive feedback
c) Negative feedback
d) It is not a feed back

56) Pick up the example of homeostasis amongst the following:
a) Salt intake during summer
b) Long term adaptation
c) Excessive sweating during exercise
d) Heating of body during exercise

57) Genetic code was discovered by
a) Nirenberg and Mathaei
b) Nirenberg and Holley
c) Holley and Ochoa
d) Holley, Nirenberg and Khorana

58) DNA having labelled thymidine is allowed to replicate in a medium
having non-radioactive thymidine. After three duplications, the DNA
molecules having labelled thymidine will be

a) One molecule
b) Two molecules
c) Four molecules
d) Eight molecules

59) Viruses can be considered ” living\” because
a) They exhibit growth
b) They respire like animals
c) They possess all metabolic enzymes
d) After entering a live cell, they reproduce by auto duplication of their genetic material

60) The nucleic acid present in a virus is
a) DNA
b) RNA
c) DNA or RNA
d) None of these

61) Which one is a cell-coded protein formed in response to infection with most animal viruses ?
a) Antigen
b) Antibody
c) Interferon
d) DNA and RNA

62) Tailed bacteriophages are
a) Motile on the surface of bacteria
b) Non- motile
c) Actively motile in water
d) Motile on surface of plant leaves

63) The virus which replicates in an arthropod, the intermediate host, and then goes to its permanent host, the vertebrate, is called
a) Reovirus
b) Parvovirus
c) Papovavirus
d) Arbovirus

64) Homeostasis is the
a) Tendency to change with a change in the environment
b) Tendency to resist change
c) regulation of an organism’s internal environment
d) Plant and animal extracts used in homeopathy

65) The potato famine of Ireland was caused by the attack of the fungus
a) Plasmopara viticola
b) Puccinia graminis
c) Phytophthora infestans
d) Phytophthora palmivora

66) Life without air is
a) Impossible
b) Anaerobic
c) Reductive
d) Free from oxidation

67) The term ‘Biology’ for the study of living things was coined in 1802 by
a) Aristotle
b) Lamarck
c) Huxley
d) Purkinje and Van Mohl

68) The process of destroying all living organisms is called
a) Pasteurization
b) Sanitation
c) Immunization
d) Sterilisation

69) The crop that occupies the maximum area of land under cultivation is
a) Wheat
b) Rice
c) Sorghum
d) Maize

70) Migration of birds is studied under
a) Ethology
b) Kalology
c) Ethnology
d) Phenology

71) Malacology is the study of
a) Shells
b) Molluscs
c) Muscles
d) Mammals

72) Reptiles are studied under
a) Herpetology
b) Ichthyology
c) Helminthology
d) Ophiology

73) What is studied under palynology?
a) Germination of pollen grains
b) Development of pollen grains
c) Morphology of pollen grains
d) Storage and arrangement of pollen grains

74) Vegetable cultivation comes under
a) Horticulture
b) Agriculture
c) Olericulture
d) Floriculture

75) Mexican dwarf varieties of wheat were developed by
a) Sahani
b) Swaminathan
c) Borlaug
d) Khush

76) Utilisation of living organisms for human welfare is
a) Ecobiology
b) Applied biology
c) Basic biology
d) Biophysics

77) Amniocentesis is employed for diagnosis of
a) Brain disease
b) Heart disease
c) Spina bifida
d) Hereditary defects

78) A bioweapon used in America in September 2001 was
a) Pilio virus
b) Anthrax
c) AIDS virus
d) Botulinum

79) The simplest amino acid is
a) Glycine
b) Lysine
c) Tyrosine
d) Aspartic acid

80) Homeostasis is the
a) Tendency to charge with change in environment
b) Tendency to resist change
c) disturbance in regulatory control
d) Plants and animal extracts used in homeopathy

81) Mimicry is meant for
a) Concealment
b) Offence
c) Defence
d) Both B and C

82) Thanatology is the science that deals with
a) Death in all its aspects
b) Solving paternity of child
c) Identification of living
d) Detection of lie

83) An example of negative feed back loop in humans is
a) Salivation of mouth at the sight of delicious food
b) Constriction of skin blood vessels and contraction of skeletal muscles in cold
c) Secretion of tears on dust particles falling in eyes.
d) Secretion of sweat glands and constriction of skin blood vessels when it is too hot

84) The term species was given by
a) John Ray
b) Linnaeus
c) Darwin
d) Aristotle

85) The suffix – aceae indicates
a) Family
b) Order
c) Class
d) Genus

86) The natural system of classification is based on
a) Ontogeny
b) Phylogeny
c) Morphology
d) Morphology and affinities

87) Two or more species occupying same or overlapping areas are
a) Sympatric
b) Sibling
c) Subspecies
d) Allopatric

88) A system of classification in which a large number of traits are considered is
a) Artificial system
b) Phylogenetic system
c) Synthetic system
d) Natural system

89) The distinction between procaryota and eucaryota is mainly based on
a) Nucleus only
b) Cell organelles only
c) Chromosomes only
d) All the above

90) In the five kingdom classification, which single kingdom contains blue-green algae, nitrogen fixing bacteria and methanogenic archaebacteria?
a) Monera
b) Protista
c) Plantae
d) Fungi

91) The scientist who developed a ‘key’ for identification of animals
a) John Ray
b) Goethe
c) Cuvier
d) Theophrastus

93) The number of criteria used in classifying organisms in the five-kingdom classification is
a) 5
b) 4
c) 3
d) 2

94) A holotype is a
a) Specimen used by author as nomenclature type
b) Specimen referred along with original description
c) Duplicate of nomenclature type
d) Specimen selected from original when nomenclature type is missing

95) Which of the following is true regarding extinct species?
a) About 99% of all that lived on earth
b) About 75% of all that lived on earth
c) About 25% of all that lived on earth
d) None of the above

96) The phylogenetic system was given by
a) Engler and Prantl
b) Pliny
c) Whittaker
d) Joh Ray

97) Viruses are
a) Obligate parasites
b) Obligate saprophytes
c) Partial parasites
d) Facultative parasites

98) In the Rous Sarcoma Virus the information flow is
a) DNA ® Protein ® RNA
b) DNA ® RNA ® Protein
c) RNA ® DNA ® Protein
d) RNA ® DNA ® RNA ® Protein

99) Commonly the genetic material of bacteriophages is
a) RNA
b) DNA
c) RNA and DNA
d) DNA and mRNA

100) T2 has
a) ds DNA
b) ss RNA
c) ds (RNA
d) ss DNA


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