Biology in Human Welfare MCQs Part I

1) The branch of science which deals with the application of scientific knowledge
to questions of civil and criminal laws

a) Forensic science
b) Occupational therapy
c) Physiotherapy
d) Biomedical Engineering

2) The branch of Biology that deals with the production of spare parts for
man, implants, artificial limbs, heart lung machines etc is called

a) Biotechnology
b) Biomedical Engineering
c) Genetic Engineering
d) Occupational Therapy

3) Ethnology is the study of
a) Animal behaviour
b) Birds
c) Human races
d) Insects

4) Ethology deals with the study of
a) Improvement of human race
b) Animal behaviour
c) Causes of diseases
d) Management of farms and production of crops

5) The new name that is often used in the place of biology is
a) Microbiology
b) Life science
c) Palaeobiology
d) Exobiology

6) The method of treatment of convalescents and the physically handicapped
utilising light work for diversion, physical exercise or vocational training

a) Occupational therapy
b) Biomedical engineering
c) Physiotherapy
d) Pharmacology

7) 15N is a
a) Heavy isotope
b) Radio isotope
c) Normal isotope
d) Both A and B

8) Which of the following is/are isotopes?
d) All of these

9) The study of populations is known as
a) Demography
b) Cartography
c) Malacophily
d) Ichthyology

10) Interferons are
a) Anticancer proteins
b) Antiviral proteins
c) Antibacterial proteins
d) Complex proteins

11) The cultural evolution of man led to
a) Exploration of outer space
b) Advanced technology
c) Population explosion
d) All the above

12) The survival of a population depends on regulatory mechanisms such as
a) Death
b) Reproduction
c) Adaptation
d) Ageing

13) An antiviral substance known to prevent the synthesis of new virus in
the cell is known as

a) Interferon
b) Antibody
c) Transferons
d) Inferno

14) Which of the following keep a check on population?
a) Food chain
b) Energy flow
c) Productivity
d) Migration

15) During which of the following stages does the nucleus have the maximum size?
a) Interphase
b) Prophase
c) Metaphase
d) Anaphase

16) The chromosome is most distinct during
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase

17) The chromatids are twisted together rationally during the early prophase of
mitosis. This is known as

a) Somatic coils
b) Minor coils
c) Plectonemic coiling
d) Paranemic coiling

18) The most thickly populated country of the world is
a) Japan
b) Indonesia
c) India
d) China

19) Which of the following is correct regarding population density?
a) D= S/N
b) D=SN
c) D=N/S
d) D=N/T

20) Population means
a) All the animals of a place
b) All the animals and plants found in an area
c) Human beings living in the area
d) Animals/plants of a species living in a specified area

21) The branch of biology that deals with the study of trends in human population growth and the prediction of future development is called
a) Neosphere
b) Gerentology
c) Demography
d) Anthropology

22) A population with an equal number of births and deaths will show
a) Acceleration phase of growth
b) Plateau phase
c) Exponential growth phase
d) Initial phase of growth

23) In case of scarcity of food or limitation of habitat, an animal population is sure to starve and die. A human escapes this disaster by
a) Emigration
b) Immigration
c) Transportation of food
d) Both emigration and transportation of food

24) The aggregate of processes that determine the size and composition of any population is known as
a) Population dynamics
b) Population dispersal
c) Population explosion
d) Population density

25) When a population reaches its carrying capacity
a) Mortality Rate = Birth rate
b) Mortality Rate greater than Birth Rate
c) Mortality Rate less than Birth Rate
d) None of the above

26) In a certain population the rate of addition of new members is higher than the rate of individuals lost. It shows
a) Zero population growth
b) Declined growth
c) Exponential growth
d) None of the above

27) For success of an animal population the most important factor is
a) Adaptability
b) Natality
c) Unlimited food
d) Inter-specific activity

28) The population of an area tends to increase when
a) Emigration occurs
b) Predation increases
c) Immigration increases
d) Reproductivity decreases

29) A force that acts against maximum population growth is
a) Saturation Capacity
b) Carrying capacity
c) Population pressure
d) Environment resistance

30) The death rate of a population is 50. So the total number of animals that died in a population of 5000 animals during that year is
a) 50
b) 2500
c) 250
d) 100

31) Bio-index number means
a) Natality- Mortality
b) Mortality / Natality
c) Natality x Mortality
d) Natality / Mortality

32) The country that shows negative population growth is
a) Brazil
b) France
c) Sweden
d) America

33) The stationary phase of a population occurs when
a) Natality is greater than Mortality
b) Natality = Mortality
c) Mortality is greater than natality
d) Natality = 0

34) The continued occurrence of sickle-cell anaemia in parts of Africa with falciparum malaria is due to
a) Continual mutation
b) Gene flow between populations
c) The better survival rate of the heterozygous individual
d) Disruptive selection

35) The best way to reduce the population of undesirable species is
a) Reduce the carrying capacity of the environment for that species
b) Elimination of females
c) Elimination of the young generation
d) None above

36) A sigmoid curve represents
a) A slow initial phase, rapid growth in the logarithmic phase and steady final

b) A rapid growth in the initial phase, slow in the second and steady in the last stage
c) No growth initially as well as in the final stage but rapid in the lag phase
d) None above

37) The ratio of natality and mortality of a population expressed in percentage

a) Vital index
b) Growth rate
c) Survival rate
d) Biotic potential

38) The most important factor for the success of any animal population is
a) Natality
b) Unlimited food
c) Adaptability
d) Inter species activity

39) Emigration means
a) One way outward movements
b) One way inward movement
c) Periodic departure and return
d) Movement of the entire population

40) Cancer causing genes are
a) paragenes
b) orthogenes
c) oncogenes
d) none of above

41) Which of the following may be curable in the next two decades?
a) Cancer
b) Poliomyelitis
c) Tuberculosis
d) None of these

42) Hela cells are
a) monkey tissue cells
b) mouse tissue cells
c) human cancer cells
d) cat cancer cells

43) The cancer of a gland is called
a) sarcoma
b) carcinoma
c) leukaemia
d) adenoma

44) What proteins are produced by a host cell in response to viral infection?
a) Antibodies
b) Phytotoxins
c) Interferons
d) Phytoalexins

45) HIV is
a) ds RNA
b) ss RNA
c) ds DNA
d) ss DNA

46) Interferon acts against
a) bacteria
b) viruses
c) fungi
d) snake venom

47) Human immuno deficiency virus (HIV) has a protein coat and genetic
material which is

a) single stranded DNA
b) single stranded RNA
c) double stranded RNA
d) double stranded DNA

48) The discovery of the AIDS virus is related to
a) E. Nontaginer
b) W. Canon
c) L. Montagnier
d) C. Louis

49) If a person shows production of interferons in his body, the chances
are that he has got an infection with

a) typhoid
b) measles
c) tetanus
d) malaria

50) The interferons are
a) antiviral proteins
b) antibiotic proteins
c) antigen proteins
d) all of these

51) The disease called AIDS was reported first in
a) Russia
b) Germany
c) USA
d) France

52) Which one of the following glands is often referred to in relation with

a) Thyroid
b) Thymus
c) Adrenal
d) Pancreas

53) Breast cancer is an example
of a

a) Adenoma
b) Lymphoma
c) Carcinoma
d) Sarcoma

54) Which of the following is a
cancer causing agent?

a) Tobacco
b) Radiation
c) Smoking
d) All of these

55) The spread of cancerous cells
to distant sites is termed

a) Metamorphosis
b) Metagenesis
c) Metastasis
d) Metachrosis

56) Adenoma refers to cancer of the
a) Glands
b) Lymph nodes
c) Blood
d) Muscles

57) The diagnosis of cancer is usually
done by

a) Biopsy
b) X-ray
c) Microscopic examination of body fluids
d) Any of these

58) Which disease is caused by activation
of oncogenes?

a) Cholera
b) Cancer
c) Viral flu
d) Tuberculosis

59) The age groups in a population are classified by their
a) reproduction rate
b) death rate
c) age of marriage
d) sex ratio

60) The cause of decline of population in 1927 was
a) the First World War
b) flood
c) food scarcity
d) The Second World War

61) The vital index means
a) Natality -Mortality
c) mortality-Natality

62) “Population is an auto-regulated system” is
the statement of

a) Malthus
b) Edward
c) Lamarck
d) Darwin

63) In a specific area, Negroes,
Aryans and Mongolians are living. They constitute a

a) group
b) monospecific population
c) polyspecific population
d) heterogeneous population

64) The distribution of the plant population on earth is
a) uniform
b) random
c) congregate
d) unequal

65) Population density means
a) The number of human per unit area
b) The number of humans in a unit area at a specific time
c) The concentration of human population at a place
d) None of the above

66) The scientist who suggested that a population is a group of species

a) Darwin
b) Odum
c) Lamarck
d) Clark

67) Which of the following acts forbids the practice of child marriage
in India?

a) Sandhya
b) Sonia act
c) Sharda act
d) Mother Teresa act

68) How many condoms per year may be needed to protect a couple in India?
a) 3
b) 52
c) 72
d) 92 only

69) In breast feeding women, which of the following can be regarded
as the best hormonal contraception method?

a) Sequential pill
b) Biphasic pill
c) Both the above
d) None of the above

70) Oral contraceptive pills should not ordinarily be prescribed to the women above the age of
a) Greater than 20 years
b) Greater than 40 years
c) Greater than 30 years
d) none of these

71) What is the target fixed by the Government of India to be achieved by the
end of the family plan regarding antenatal care?

a) 25%
b) 50%
c) 60%
d) 75%

72) The meaning of the term sex ratio is
a) number of males/1000 females
b) number of females/1000 males
c) both
d) none

73) According to the last census the sex ratio in the present decade … in comparison to the
last decade is:

a) decreased
b) gone up
c) remained the same
d) none of the above

74) If India’s population is increasing at the rate of 13.6 million population,
then what population is contributed by Indians in one calendar year?

a) 10%
b) 17%
c) 15%
d) 20%

75) The best way to make an estimate of future population is by the
a) arithmetic progression method
b) natural increase method
c) geometric progression
d) all of the above

76) According to the last census, Bihar is in the … place in India
in respect of population:


77) Which among the following is regarded as an absolute contraindication
to the use of the oral contraceptive pill?

a) Eczema/dermatitis
b) Lactating mother
c) Carcinoma breast
d) Epilepsy

78) Lippe’s loop is manufactured in India at
a) Madras
b) Calcutta
c) Bangalore
d) Kanpur

79) Interferon is
a) Anti-viral
b) Anti-bacterial
c) Anti- animal cell
d) Bacteria

80) By 2000 A.D. the effective couple protection rate was about
a) 40%
b) 50%
c) 60%
d) 70%

81) In which year was the population policy was announced in India?
a) 1971
b) 1976
c) 1978
d) 1981

82) Under which stage of the demographic cycle is India in at present?
a) early expanding
b) late expanding
c) phase of decline
d) high stationary

83) A net reproduction rate of one indicates that the
a) male population is falling rapidly
b) female population is increasing
c) female population is constant
d) female population is falling rapidly

84) What is the percentage of children’s population under 15 years of age?
a) 22
b) 33
c) 42
d) 30

85) The J-growth curve has …. and …. phases:
a) lag, exponential
b) lag, stationary
c) exponential stationary
d) lag, exponential stationary

86) Intrauterine devices are used to prevent
a) the sperm from reaching the egg
b) the sperm from reaching the female
c) the sperm from living
d) all the above

87) The “Test tube baby” is a technique where
a) the zygote is taken from the ovary, cultured and then implanted
b) the ovum is taken and fertilized outside, then implanted in the uterus
c) sperm and ovum are fertilized and grow in the test tube
d) none of the above

88) Exponential growth is maximum in
a) tissue culture cells
b) embryo
c) unicellular organisms
d) multicellular organisms

89) In a population curve the rate of growth becomes steady
towards the end of the exponential curve because of

a) reduced reproducing power
b) environmental stress
c) migration
d) all the above

90) If each couple should produce only two children the result would be the
a) checking of pollution
b) stabilising the ecosystem
c) increasing the fertility of soil
d) improving the food web

91) Amniocentesis has helped
a) the childless couples to conceive
b) set the anti-female demographic snowball in motion
c) establish the biological superiority of the female
d) waste money

92) Two opposite forces operate in the growth and development
for every population. One of them is related to the ability to reproduce at a given rate. The force opposing it
is call

a) biotic control
b) mortality
c) fecundity
d) environment resistance

93) One of the critical mechanisms by which the environment
controls the population of a species is by

a) removal of excreta
b) spread of disease
c) check on death rate
d) restricting the supply of food

94) The most important component of the oral contraceptive
pills is

a) progesterone
b) growth hormone
c) thyroxine
d) luteinizing hormone

95) Genetic drift operates only in
a) island populations
b) smaller populations
c) larger populations
d) mendelian populations

96) Demographers describe ZPG as
a) zero population growth
b) low reproduction rate
c) no reproduction
d) replacement reproduction

97) If the rate of addition of new members increases with
respect to the number of individuals lost from the same population,
then the graph obtained is

a) declining growth
b) exponential growth
c) zero population growth
d) none of these

98) Contraceptive oral pills help in birth control b y
a) killing the sperms
b) forming barriers between sperms and ova
c) preventing ovulation
d) killing the ova

99) The average ratio of men and women in the human population is
a) 3:4
b) 1:1
c) 3:5
d) 1:2

100) Amniocentesis is a process to
a) determine heart disease
b) determine the presence of hereditary disease in the embryo
c) determine brain disease
d) all of these


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