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SAMPLE QUESTIONS

1.    Which of the  following is the  form of selection  that operates  in most  natural  populations?
(A)    Disruptive selection         (B)     Stability selection
(C)    Kin selection                   (D)    None of the above

2.    _______________Sometimes  occurs  in situations  where individuals of  two  previously  isolated  demes  come back  into sympatry?
(A)    A neuploidy and  polyploidy     (B)     Sympatric  and allopatric
(B)    Sympatric and poluploidy         (D)    Euplidy  and neuploidy

3.    If Mendel has chosen to work  on seven characters in  a plant  species  having  only four  chromosomes  per somatic  cell,  then the   most likely  outcome would have been that he:- 
(A)     would  have discovered  blending inheritance  
(B)     could not  have proposed  that genes are located  on chromosomes
(C)    might  not have  discovered  the law of  
(D)    might  not have  discovered  the law of  segregation

4.    In humans, red- green  colour  blindness  is recessive  and sex  linked  while  albinism  is recessive  and  autosomal. A  marriage   between  two homozygous  parents,  a normal  versioned albino  women  and a colour  blind  and normally   pigmented   man will  produce   children:- 
(A) Who  are all phonotypically  normal      versioned  have normal      pigmentation. 
(B) Half   of whom are colour  - blind   and the other half having normal     vision and all of  them having normal pigmentation. 
(C) All  of whom  have normal   vision  but half  of whom   are albino and     the other half  with normal pigmentation.     
(D) Of the four  categories, normal  versioned;   pigmented;   normal      versioned  albine;   colour blind  pigmented; colour  blind,   albino; all      in equal  properties.

5.     A rule,   which states  that, "During   the evolution  of lineage, serially     homologous  parts  tend   to reduce   in number   but get  more and more differentiated"  is ...............Rule
(A)     Cope's      (B)      Bergmann's     (C)     Jordon        (D)      Williston's 

6.      T- DNA  refers  to 
    (A)      DNA   for  information  of tRNA         (B)      part  of  T1 
    (C)      translocated DNA                            (D)      transformed DNA

7.    Non- histone  Protins  found in chromosomes  help in 
(A)    Replication of DNA             (B)    Transcription 
(C)    BOTH 'A'  & 'B'                 (D)     non of these

8.    We know that DNA is acidic   in nature while, histones are the basic      proteins  so these   two are closely  associated together  in a     chromosome.  An acidic  proteins helps  in association  of DNA   and     hsitones.  This is 
(A)     Nucleoplasmin       (B)    Histidine     (C)     Non-  histones        (D)    Tubullin

9.     Which cell  organelle  has maximum      specific  gravity
(A)    Mitochonidria      (B)    Chloroplasts     (C)    Centrosome       (D)    Ribosomes

10.     Chromosome  number increases or decreases   due to:
(A)    Multiplication                   (B)     Mutagenic change 
(C)     Genetic  repete              (D)    Non-  disjunction  of chromosome

11.    Crystal  violet,   the stain is chemically called 
(A)    Parasanilin      (B)  Pyronin       (C)  Triamino-  triphenylmethane    (D)  Chloro-zinc iodine        

12.    Differential   and gradient  centrifugation  of cell homogenates or,     cell suspensions  are done  to separate- 
(A)    Various  cell organelles  &  various  macromolecules     
(B)    Cell  organelles   only
(C)    Macromolecules  only
(D)    Nucleus  &  mitochondria only

13.    What will   happen  to the rate   of photosynthesis  if sodium   bicarbonate is added  in the water   having   Hydrilla plant   in a beaker- 
(A)    It will  be retarded  
(B)    It will remain  normal 
(C)    It will be accelerated     
(D)    None of the  above

14.    Complete   oxidation  of one  molecule  of acetyl  Co-  A  results   in the formation of: 
(A)    12 ATP        (B)15 ATP       (C)9 ATP           (D)38 ATP

15.    Zig  zag  development  of inflorescence   axis  is an example  of  
(A)    helicoid  cyme     (B)scorpioid  cyme  (C) verticillaster      (D) spadix

16.    Bioherbicides  have been recommended

(A)    to prevent ecodegradation        (B) because  of their  ready  availability 
(C)     because  of their cheap rates    (D) because  of their abundance

17.    Nepenthes khasiana  a rare  and endangered  pitcher plant   occurs  in India  in
(A)    Himachal  Pradesh  (B) Madhya  Pradesh    (C) Kerala    (D) Meghalaya

18.    The  rate at which  light  energy js  converted   into chemcial energy   of organic  molecules  in the ecosystem's  are  
(A)    Net  primary  productivity         (B) Gross  primary  productivity 
(C)     Net secondary productivity      (D) Gross primary productivity

19.    Colchicines arrests   which of the   following   stage  of cell  division? 
(A)     Prophase       (B) Anaphase         (C) Telophase     (D) Metaphase

20.    "All cells  are derived  from  pre- existing  cells  "is called by:- 
(A)     Lamarck      (B) Robert   Hooke   (C)  Schultz    (D)Rudolph  Virchow.

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