Biology in Human Welfare MCQs-Dec 2017

1) The present population of the world is about
a) 500 million
b) 100 million
c) 15 trillion
d) 6 billion

2) The gene frequency of a population will continue to remain
stable, as long as it is not influenced by

a) mutation
b) selection
c) random mating
d) random drift

3) The world’s populace today consumes around …. tons of food per year

4) Ratio of natality and mortality of a population
is expressed in percentage as its

a) vital index
b) growth rate
c) survival rate
d) biotic potential

5) A force acting against achievement of the highest possible level of population growth is the
a) carrying capacity
b) environment resistance
c) population pressure
d) saturation level

6) The niche of a population is the
a) place where it lives
b) geographical area that is covers
c) set of conditions that it interacts with
d) set of conditions and resources it uses

7) The term test tube baby means
a) a baby grown in a test tube
b) an embryo fertilized and developed in a test-tube
c) an embryo fertilized and developed in the uterus
d) fertilization in vitro and then transplanted into the uterus

8) A rapid decline in the population due to high mortality rate, is called
a) population density
b) population crash
c) population explosion
d) all of these

9) The concept that the population tends to increase geometrically while food supply increases arithmetically was put forward by
a) Stuart Mill
b) Adam Smith
c) Thomas Malthus
d) Charles Darwin

10) In India, the human population is heavily weighted towards the younger age groups as a result of
a) the short life span of many individuals and a low birth rate
b) the long life span of many individuals and a low birth rate
c) the short life span of many individuals and a high birth rate
d) the long life span of many individuals and a high birth rate

11) The study of population is known as
a) geography
b) demography
c) paleontology
d) cartography

12) What is the present growth rate of the human population?
a) 2% per annum
b) 5% per annum
c) 10% per annum
d) 15% per annum

13) Which of the following is related to reproductive isolation?
a) Genetic isolation
b) Temporal isolation
c) Behavioural isolation
d) All of these

14) Two populations A and B, growing in the same habitat and showing morphological similarity are intersterile. In terms of the biological species concept these can be considered
a) one species
b) two distinct species
c) two sibling species
d) two distinct genera

15) Reproductive isolation may be
a) behavioural and genetic
b) mechanical and geographical
c) ecological and temporal
d) all of these

16) The spread of genes from one breeding population to another by migration which may result in changes in gene frequency is called
a) gene flow
b) genetic drift
c) gene frequency
d) gene pool

17) Allopatric speciation is due to geographical
separation of

a) species
b) populations
c) plants
d) animals

18) A species is a collection of demes. The deme is a group of
a) genes in different environment
b) individuals in same environment
c) chromosome in same organisms
d) populations with a common gene pool

19) The branch of study concerning the improvement of the future human race is
a) Euthenics
b) Eugenics
c) Biometrics
d) Epigenesis

20) The science of improving hereditary qualities in human generations is called
a) genetics
b) eugenics
c) ecology
d) geography

21) Different species can be formed directly from local races through
a) sympatric speciation
b) quantum speciation
c) ecological speciation
d) none of these

22) The factor which imposes a check on population size is called environmental
a) resistance
b) carrying capacity
c) selection
d) isolations

23) One of the main factors to control population density is
a) industry
b) climatic factors
c) mining
d) natural resources

24) Human population density is predominantly influenced by
a) socio-cultural factor
b) cold environment
c) food and water availability
d) none of the above

25) The most critical problem today is
a) Population explosion
b) Pollution
c) Nuclear proliferation
d) Natural calamities

26) One who studies human population trends and changes is called a
a) Human ecologist
b) Cartographer
c) Statistician
d) Demographer

27) The abundance of a species of population within its habitat is called
a) Regional density
b) Niche density
c) Absolute density
d) Relative density

28) A population that has not reached the carrying capacity is likely to
a) decline in number
b) remain stable in number
c) grow but not at an exponential rate
d) grow exponentially

29) A population that exceeds its environmental resources is most likely to
a) crash
b) exceed its biotic potential
c) lower environmental resistance
d) none of the above

30) The human population in the present day is thought to be in the
a) Lag phase
b) Exponential phase
c) Stationary phase
d) None of these

31) The fifth billionth baby in the world was born on
a) March 5, 1985
b) July 11, 1987
c) April 10, 1990
d) None of these

32) Which one of the following factors has contributed most to the rapid rise of human population in the present century?
a) increase in birth rate
b) polygamy
c) decrease in infantile mortality
d) decrease in death rate of old people

33) What is the correct chronological sequence of the three phases resulting in human population growth?
a) Agricultural phase, hunting and gathering phase, industrial phase
b) Hunting and gathering phase, industrial phase, agricultural phase
c) Agricultural phase, industrial phase, hunting and gathering phase
d) Hunting and gathering phase, agricultural phase, industrial phase

34) The impact of human population is directly related to the
a) Standard of living
b) Food supply and housing
c) Health and medical care
d) All of the above

35) According to which theory will the human population outrun food supply?
a) Altrusian theory
b) Malthusian theory
c) demographic theory
d) darwinian theory

36) The maximum population growth rate is recorded in
a) Kenya
b) Mongolia
c) Mozambique
d) Cambodia

37) According to recent studies, the most thickly populated country in the world is
a) Japan
b) Bangladesh
c) Pakistan
d) Philippines

38) Which of the following is the most populous country in the world?
a) India
b) Indonesia
c) China
d) USA

39) Which of the following countries has a declining population?
a) Vietnam
b) Switzerland
c) United States
d) Zimbabwe

40) The International Conference on Population and Development (ICDP) was held in 1994 at
a) Paris
b) Brasilia
c) Cairo
d) Jerusalem

41) The official counting of population is known as
a) Enumeration
b) Population statistics
c) Census
d) None of these

42) The first census in India was carried out in
a) 1871
b) 1881
c) 1891
d) 1901

43) In India, census is recorded after every
a) 5 years
b) 10 years
c) 15 years
d) none of these

44) Females outnumber males in
a) Assam
b) Delhi
c) Tamil Nadu
d) Kerala

45) Depo-Provera refers to
a) Oral contraceptive
b) Injectable contraceptive
c) Intrauterine device
d) Implant

46) Most contraceptive pills contain
a) FSH + Estrogen
b) LH +Progesterone
c) Estrogen + Progesterone
d) FSH + LH

47) The first test tube baby was born in
a) USA
b) France
c) England
d) India

48) An autoanalyser estimates the various
a) biochemical substances present in body fluids
b) ions present in the nervous system
c) nucleic acids in cells
d) all the above

49) A positron is a
a) positively charged acid in cells
b) positvely charged antimatter particle
c) neutron
d) none of the above

50) When ultrasonic waves pass through homogeneous medium and come across another tissue or organ then they are reflected and received by the same crystal and they are converted into
a) heat
b) mechanical signals
c) electrical signals
d) none of the above

51) The study of population is known as
a) Geography
b) Demography
c) Paleontology
d) Cartography

52) H.J. Muller was awarded the Nobel Prize in 1946 for his
a) Discovery that ionizing radiations can induce gene mutation
b) Work of gene mapping in Drosophila
c) Efforts to prevent the use of nuclear weapons
d) Discovery that chemicals can induce gene mutation

53) The young chickens raised specifically for meat are called
a) Layers
b) Broilers
c) Cockerels
d) Pullets

54) Interferons are
a) antiviral proteins
b) antibiotic proteins
c) anti-cancer proteins
d) antigen proteins

55) If a person shows production of interferon in his body, the chance are that he has got an infection of
a) Measles
b) Malaria
c) Tetanus
d) Typhoid

56) The number of births per thousand people in the population is expressed as the
a) Growth rate
b) Crude birth rate
c) Conception rate
d) Reproduction rate

57) The population of a species varies each year
a) Very largely
b) Not at all
c) By achieving minimum amplitude and maximum density
d) By achieving maximum amplitude and minimum density

58) The Ranthambore National Park is located in
a) Rajasthan
b) Uttar Pradesh
c) Gujarat
d) Kerala

59) In an ageing person, there is a
a) Increase in muco polysaccharide cement of connective tissue
b) Gradual alteration in components of connective tissue
c) Increasing collagen rigidity of connective tissue
d) Both B and C

60) The ability of animals to regenerate lost part was first reported by
a) Pattern
b) Trembley
c) Storer
d) Carison

61) According to the immunity theory of ageing, ageing is due to the
a) Accumulation of errors
b) Reduced functioning of endocrine glands
c) Degeneration of thymus
d) Accumulation of waste products

62) In ageing there is a/an
a) Decrease in cholesterol level
b) Increase in calcium content of arteries and cartilage
c) Decrease in calcium content of arteries and cartilage
d) Decrease in blood urea

63) Which is not connected with a theory of ageing?
a) Wear and Tear
b) Neurohormonal changes
c) Epimorphosis
d) Metabolic rate

64) Growth is an irreversible process found at the organisation level of
a) Subcellular growth
b) Cellular growth
c) Organ growth
d) All the above

65) The highest growth rate occurs in the
a) Stationary phase
b) Lag phase
c) Exponential phase
d) Senescent phase

66) Ageing is due to the accumulation of harmful proteins. This theory is
a) Free radical
b) Cross-linking
c) Error catastrophe
d) Cross linking

67) Programmed cell death is called
a) Cell lysis
b) Autotomy
c) Apoptosis
d) None of the above

68) The regeneration of the liver is
a) Epimorphosis
b) Reparative regeneration
c) Metamorphosis
d) Morphogenesis

69) Which of the following can regenerate its entire alimentary canal?
a) Fish
b) Amphibian
c) Bird
d) Sea Cucumber

70) Mood altering drugs are called
a) Hallucinogens
b) Psychotropic
c) Psychoactive
d) Both B and C

71) Vodka is prepared by fermenting
a) Potato
b) Fruit Juice
c) Molasses
d) Cashewnut thalamus

72) Beer is prepared in India from
a) Maize
b) Pearl Millet
c) Barley
d) Rye

73) Whisky is prepared in India from
a) Grains
b) Fruit Juice
c) Molasses
d) Potato

74) An enzyme present in limited quantity in Asians for the metabolism of alcohol is
a) Alcohol dehydrogenase
b) Succinate thiokinase
c) Acetaldehyde dehydrogenase
d) Both A and B

75) A drinking hangover is the
a) Increased desire to take alcohol
b) Feeling of giddiness and nausea in the morning after having taken too much alcohol
c) Development of gastritis and peptic ulcers due to alcohol addiction
d) Both A and B

76) Alcohol is absorbed in the
a) Mouth
b) Mouth and oesophagus
c) Stomach and proximal intestine
d) Throughout alimentary canal

77) In alcoholics, liver cells accumulate fat. Far formation is stimulated by
a) Alcohol
b) Acetaldehyde
c) Thiamine deficiency
d) Folic acid deficiency

78) Alcohol taken along with barbiturates will cause
a) Enhanced excitement
b) Marked depressant effect
c) Hallucination
d) Both B and C

79) Antabuse is used in the deaddiction process for alcohol because
a) It causes aversion reaction
b) It indicates the amount and time of recent drinking
c) It satisfies the craze for alcohol
d) It immediately informs AA.

80) A bottle of alcoholic drink has a print line indicating 125% proof. The alcohol content of the drink is
a) 12.5%
b) 25%
c) 49.29%
d) 61.6%

81) Addiction to LSD leads to
a) Hallucination
b) Damage to kidneys
c) Mental and emotional disturbance
d) Damage to lungs

82) Morphine is extracted from
a) Cajanus cajan
b) Cannabis sativa
c) Papaver somniferum
d) Rauwolfia serpentina

83) Heroin is from
a) Tobacco
b) Poppy
c) Datura
d) Cannabis

84) LSD is obtained from
a) Cannabis
b) Claviceps
c) Fusarium
d) Nostoc

85) Brown sugar is
a) Barbiturate
b) Heroin
c) LSD
d) Hashish

86) An irrational fear of disease is called
a) Algophobia
b) Mysophobia
c) Pathophobia
d) Haematophobia

87) In a drunk person, the part of the brain to be affected first is the
a) Cerebellum
b) Pons varolli
c) Medulla oblongata
d) Cerebrum

88) Beer is fermented from
a) Molasses
b) Grape
c) Barley
d) Wheat

89) L.S.D., morphine and Bhang are respectively obtained from
a) Claviceps, Papaver and Cannabis
b) Claviceps, Cannabis and Rauwolfia
c) Cannabis, Claviceps and Fusarium
d) Claviceps, Rauwolfia and Papaver

90) 23 Naloxone/nalorphine is used as an antidote intravenously for overdose of
a) Heroin
b) Alcohol
c) Librium
d) Morphine

91) The liver damage due to alcohol is due to the
a) Overload of detoxification
b) Higher level of sugar consumption by the liver
c) Cancerous growth in the liver
d) Fat deposition in liver

92) Coffee originated in
a) America
b) Europe
c) Africa
d) Asia minor

93) From which part of Papaver somniferum is opium obtained?
a) Unripe fruit
b) Ripe fruit
c) Male plant
d) Inflorescence

94) A person showing unpredictable moods, out-bursts of emotions, quarrelsome behavior and conflicts with others is suffering from
a) Addictive disorders
b) Schizophrenia
c) Borderline personality disorder
d) Mood disorders.

95) Which of the following statements is false?
a) Psychoactive drugs alter activity of nervous system
b) Adolescence is marked by accelerated physical growth, development of reproductive organs and changes in functioning of neuroendocrine system
c) Hallucinogen can alter one’s thoughts, feelings and perceptions
d) Mescaline is a stimulant

96) The psychological disorder which is characterized by tiredness, hopelessness, low self esteem, decline in interest, energy concentration and changes in sleep pattern and appetite is called
a) Anxiety disorder
b) Obessive-compulsive disorder
c) Attention deficity disorder
d) Mood disorder

97) The number of breeds of the Indian Buffalo is
a) 7
b) 13
c) 16
d) 17

98) A milch breed of cow is
a) Haryana
b) Malvi
c) Kankrej
d) Sahiwal

99) A hybrid breed of cattle is
a) Sunandini
b) Holstein
c) Brown Swiss
d) Kankrej

100) Trimming of combs and wattles of young poultry birds is called
a) Culling
b) Dubbing
c) Brooding
d) Pullet


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