BIOLOGY                    Ch. 1 & 3
1)       Living things posses all of the following characteristics except.
         a)       Can acquire and use energy                  
         b)       Cannot maintain fairly constant internal environment
         c)       Contain genetic program of their characteristics
         d)       Responding to changes in their environments
2)       All of the following are different branches of Biology except.
         a)       Geography         b)       Evolution         c)       Palaeontology  d)          Genetics
3)       No. of Bio elements is
         a)       92                b)       16                c)       4                 d)       104
4)       65% of bio-elements is
         a)       Hydrogen          b)       carbon            c)       nitrogen          d)       oxygen
5)       Which one of the following element is not found in traces in living bodies.
         a)       zinc              b)       copper            c)       calcium           d)       manganese
6)       Which one of the following is the direct source of energy in living bodies?
         a)       ATP               b)       glucose           c)       amino acid        d)       faty acid
7)       Sub-cellular structures are known as
         a)       Cells             b)       Organelles        c)       Tissue            d)       Organ
8)       All of the following are double membrane bounded organelles except.
         a)       Mitochondria b)            Chloroplast       d)       Vacuole           d)       nucleus
9)       Group of different tissues organized to perform a function with great efficiency is
         known as
         a)       An organism   b)           An organ          c)       Tissue            d)       Population
10)      All of the following functions are performed by rot except
         a)       Anchor the plant                             b)       Manufacture food
         c)       Storage of food                              d)       Procuring of minerals
11)      Which organ of plant is involved in producing next generation sexually?
         a)       Root              b)       Leaf              c)       Stem              d)       Flower
12)      Radio active isotopes contained by older sediment layer is
         a)       Nil               b)       Equal to younger sediment layer              
         c)       Less than younger sediment layer             d)   Greater than younger sediment layer
13)      Plants having foreign DNA incorporated into their cells are known as
         a)       Clone             b)       Transgenic plants          c)       Eugenic plant  d)          Mutant
14)      In chemotherapy
         a)       Cancerous parts are exposed to short wave radiation
         b)       Administrating certain anti-cancerous chemicals to the patient
         c)       Gene therapy                                 d)       All of these
15)      Cloning could make
         a)       Multiple copies of desired genotype
         b)       Used to produce genetically identical cattle
         c)       Commercial production of valuable animals
         d)       All of these
16)      Degradation of toxic materials by living organisms is known as
         a)       Integral disease management                  b)       Bioremediation
         c)       Molecular biology                            d)       Micro biology
17)      One of the following is not a characteristic of a hypothesis  
         a)       Experiments can prove it true or false
         b)       It can be converted into a theory or a law
         c)       It is less explanatory than theory or law
         d)       It is always a religious idea
18)      A scientific law is
         a)       A uniform of constant fact of nature                  b)       Virtually irrefutable theory
          c)       True only under certain conditions                d)      True about all of these  
19)     Which of the following is not included in biology  
        a)       Study of animals                         b)       study of plants  
        c)       Study of atoms and molecules             d)       Study of bacteria and virus  
20)     A systematized knowledge is known as  
        a)       Religion        b)       Philosophy      c)       Science         d)       Imagination  
21)     All of the following do not produce transgenic organism except  
        a)       Introduction of desired gene in the organism  
        b)       Replacement of nucleus of unfertilized egg with a diploid of nucleus somatic cell  
        c)       Produced from zygote  
        d)       Asexual reproduction  
22)     All of the following can treat cancer except  
        a)       Radiotherapy  b)         Chemotherapy c)          Gene therapy   d)        Antibiotics  
23)     Technique used to determine nutrients requirements of plants  
        a)       Genetic engineering                      b)       Bioremediation  
        c)       Hydroponics culture                      d)       Chemotherapy  
24)     Scientific ways to form hypothesis  
        a)       intuition                                b)       esthetic preference      
        c)       comparison and analogy with other processes                       d)       All of these  
25)     Which of the following is true about malonic acid as inhibitor  
        a)       Attached at position other than active side  
        b)       Attached on succinic acid  
        c)       Block succinic acid dehydrogenase  
        d)       Is irreversible inhibitor  
26)     An enzyme that undergoes reversible changes in shape and in catalytic activity when
        control substance binds is  
        a)       Inhibited enzyme                 b)      Allosteric enzyme  
        c)       Holoenyzme                       d)      None of these  
27)     Optimum temperature for pepsin is  
        a)       3      b)      37C             c)      38C             d)      40C
28)     A biochemical reaction would proceed at a very slow speed making life impossible in
        the absence of  
        a)       Enzyme          b)       Cofactor        c)       Coenzyme        d)  Substrate  
29)     Every  enzyme  by  virtue  of  its  specificity  recognizes  and  reacts  with  a  special
        chemical substance called  
        a)       substrate       b)       Apoenzyme       c) Holoenzyme            d) Coenzyme  
30)     At  low  concentration  of  substrate  the  enzyme  catalyzed  reaction  rate  is  directly
        proportional to the availability of  
        a)       Substrate       b)       Enzyme          c)       coenzyme        d)       Activator  
31)     The essential raw material from which the coenzymes is made  
        a)       Metal ions      b)       Vitamins        c)       proteins        d)      Carbohydrates  
32)     The “Induce Fit Model” for enzyme action was put forward by  
        a)       Emil Fisher     b)  F. Sanger            c)  Koshland             d) Melvin Calvin  
33)     The rate of an enzyme catalyzed reaction  
        a)       Is constant under all conditions  
        b)       Decreases as substrate concentration increases  
        c)       Cannot be measured  
        d)       Can be reduced by inhibitors  
34)     The catalytic activity is restricted to a small portion of enzyme structure known as  
        a)       substrate       b)       Cofactor        c)       Active site     d)  Prosthetic group  
35)     The active site of an enzyme is made up of  
        a)       Only one definite region  
        b)       Two definite regions  
        c)       Three definite regions  
        d)       Four definite regions  
36)     Every enzyme functions most effectively over a narrow range of pH known as the:
        a)       Optimum pH   b)   Maximum pH             c)   Minimum pH          d)  Low grade pH
37)     Which structure acts as a bridge between enzyme and its substrate  
        a)       Cofactor                         b)      Binding site  
        c)       Apoenzyme                        d)      Catalytic site  
38)     Which of the following acts as an enzyme inhibitor  
        a)       Salt            b)       Poison          c)       Sugar           d)       Soda  
                                                                                                         
39)     Enzymes                          the activation energy of the reactions  
        a)      Increase        b)      Decrease        c)     Change          d)   Has no effect  
40)     Lock and key model was proposed in  
        a)       1595           b)       1959           c)      1890           d)       1980

                                                                                                     
                                                                                                                

                         BIOLOGY                   Ch. 21, 23
1)       The process o mitosis ensures  
         a)       Change in nature of genes          
         b)       A reduction in the number of chromosomes  
         c)       An increase in the size of cells
         d)       Same number of chromosomes in daughter cells  
2)       What is the importance of the fact that meiosis occurs during the formation
         of gametes  
         a)       It allows the no. of sex cells to become half
         b)       It prevents variation appearing the phenotype  
         c)       It produces haploid sex cells in preparation of fertilization  
         d)       It prevents asexual reproduction  
3)       In  which  of  the  following,  daughter  nuclei  contain  only  one  chromosome
         from each original pair of the chromosomes  
         a)       mitosis but not meiosis                      b)      meiosis but not mitosis  
         c)       both mitosis and meiosis                     d)       neither mitosis and meiosis  
4)       Mitotic apparatus of a plant cell consists of  
         a)       spindle fibers                               b)       centrioles  
         c)       aster                                        d)       all of these  
5)       Mitosis takes place during  
         a)       healing of wound                             b)       development and growth  
         c)       vegetative propagation                       d)       all of these  
6)       The sex chromosomes of persons subjected to klinefelters syndrome are  
         a)       xxy                                          b)       xyy              
         c)       both of these                                d)       none of these  
7)       Down’s syndrome in human beings is due to  
         a)       An extra sex chromosome                      b)       An extra X-chromosome  
         c)       An extra Y-chromosome                        d)       An extra autosome  
8)       Which of the following category comes under Turners Syndrome  
         a)       A male having two X-chromosome  
         b)       A female having three X-chromosome  
         c)       A male having only one Y-chromosome  
         d)       A female having only one X-chromosome  
9)       Failure  of  the  chromosomes  to  separate  from  each  other  during  meiosis  is
         called  
         a)       Disjunction                                  b)       Crossing over  
         c)       Non-disjunction                              d)       Segregation  
10)      Morphology of chromosome is best studied during  
         a)       Telophase                                    b)       metaphase  
         c)       prophase                                     d)       all  
11)      Spindle fibers are formed by special type of proteins called  
         a)       histone           b)       tubulin           c)       transein         d)       fibrin  
12)      Synapsis occurs during  
         a)       zygotene          b)       pachytene         c)       diplotene        d)   diakinesis  
13)      A bivalent consists of  
         a)       two chromatids                               b)       four chromatids  
         c)       one homologous chromosome                    d)       a typical chromosome  
14)      In meiotic I, nuclear membrane disappears in  
         a)       prophase I        b)       metaphase I       c)       anaphase I       d) telophase I
15)      Which of the following is not related to meiosis  
         a)       involve in sexual reproduction  
         b)       variation are produced  
         c)       maintains chromosome number constant from generation to generation  
         d)       homologous pairs of chromosomes are attached to each other