MDCAT Biology Entry Test No.4 Past Papers Chapter Wise

MDCAT BIOLOGY ENTRY TEST PAST PAPERS

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81.  Gene of interest can be isolated from the chromosoms by cuttintg the chromosomes on the      

(a)   Palindromic sequences        (c) Binding site

(b)   Flanking site                       (d) Promoter

82.  Restriction enzymes are called so because they restrict the growth of

(a) chromsome             (c) bacteria

(b) Viruses                    (d)cell

83.  PSC 101 has antibiotic resistance gene for

(a)   tetracycline (c) tetracycline  & ampicilline

(b) ampicilline  ( d) penicillin

84.  which one of the following can be used as vectors for cloning gene of interest

(a) palsmid DNA          (c)Both palasmid & viral DNA

(b) Viral DNA               (d)Bacterial DNA

85.  Out of 400 isolated restriction enzymes,_____________are frequently used in recombinent DNA  technalogy

(a) 20                           (c) 200  

(b) 40                           (d) 400

86.  The first stage in PCR is to heat DNA for

(a) 1 mint                                  (c) 1.5 mint

(b) 2 mint                                 (d)2.5 mint  

87.  During vortex mixing , the eggs are placed in an agitators with DNA and needles of

(a) calcium chloride      (c) Sodium chloride

(b) calcium carbide       (d) silicon carbide   

88.  Genetically engineered mice devolped by scientists of U.S department of agriculture produce human growth hormone in their

(a) milk                        (c) Blood

(b) Urine                       (d) Milk & urine    

89.  Gene therapay is the insertion of genetic material in to human cells for the

(a) production of clone              (c) treatment of cancer

(b) production of pharmaceuticals (d) treatment of disorder

90.  Biotic components include all living organisms supported by

(a) atomosphere            (c) hydrosphere

(b) Biosphere                (d) Lithosphere

91.  Consumers are primarily

(a) photosynthetic plants (c) autotrophic organisms

(b) becteria & fungi        (d) animals

92.  Decomposers release elements as

(a) molcules                              (c)ions

(b) compounds                          (d) gases  

93.  Succession starting on a dry soil is called

(a) xerosere                   (c) primary succession

(b) hydrosere                 (d) secondary succession  

94.  The third stage of xerosere is

(a) herbaceous               (c) foliage lichene

(b) crustose lichene        (d) moss

95.  The relationship b/w insects and flowrintg plants is an example of

(a) commensalism                     (c) parasitism

(b)mutualism                            (d) predation

96.  The prey of fox may be  

(a) cat                           (c)frog

(b)rabbit                       (d) hawk  

97.  Total barren land is the final result of

(a) over grazing              (c) moderate grazing

(b) under grazing            (d) trampling by hooves

98.  The number of trophic levels of all the food chains and food webs

(a) 1-3              (c) 3-5

(b) 2-4              (d)5-7    

99.  The stability of ecosystem is maintained by  the ____________ in a food web

(a) number of trophic levels        (c) number of pathways

(b) variety of trophic levels         (d) variety of pathways

100.  Early man had a niche in the ecosystem as a

(a) producer                   (c)secondary consumer

(b) primary consumer    (d) tertiary consumer

101.  The study of human population and things that affect them is called

(a) zoogeography  (c) demography

(b) geography        (d)discography

102.  The destruction of forests leaves the soil brren and this is called

(a)afforestation  (c) reforestation

(b)deforestation (d)grazing  

103.  The decline in thickness of the ozone layer is caused by

(a) increasing level of CFCs  (c)increasing level of  CO

(b) decreasing level of CFCs (d) decreasing level of CO

104.  Greenhouse gases are those which prevent _______ to escape out from them

(a) CO₂                         (c) light

(b) CO                          (d) heat

105.  Lamark published his theory of evolution in

(a) 1744                         (c)1829

(b) 1809                         (d) 1836

106.  In the Darwinian view, the history of life is like a /an

(a) natural history                     (c) ladder  

(b) acquired character               (d) tree

107.  Neo-Darwinism is another name for

(a) modern synthesis     (c) unequal ability of individual

(b) struggle for existance (d) non – random survival

108.  All vertebrate embryos  go through a stage in which they have

(a) Gills            (c) eustachian tubes

(b) Gill pouches             (d) Middle ear

109.  An animal that preys on other animals is

(a) prey              (c) symbiont

(b) parasite       (d) predator  

110.  Most fossils are found in

(a) soil                          (c) sedimentary rocks

(b) water                       (d) clay