TNPSC Group I Exam-Previous Year Question Paper-Subject wise Analysed Questions-Science-Part 13

TNPSC Group I Exam-Previous Year Question Paper-Subject wise Analysed Questions-Science-Part 13

301.    The most common method of vegetative reproduction is Usnea is

            A)        fragmentation                       B)        soredia

C)        gemmae                               D)        hormogonia

Answer: (D)

302.    Which of the fungi mentioned below is employed as a genetic tool?

            A)        Aspergillus                            B)        Neurospora

C)        Gibberella                              D)        Penicillium

Answer: (B)

303.    Heterotrichous habit is exhibited by

            A)        Vaucheria                           B)        Dictyota

C)        Ectocarpus                        D)        Spirogyra

Answer: (C)

304.    Photosynthesis cannot take place in

            A)        Red light                                B)        Blue light

C)        Ultraviolet light                       D)        Green light

Answer: (C)

305.    Consider the following statements:

            I.          In Pinus only simple cleavage polymbryony is seen

            II.         In Pinus  both simple polyembryony and cleavage

polyembryony are present

            III.        In Pinus polymbryony is not seen

            IV.       In Pinus embryogenesis is not clear

            Of the statements:

            A)        IV alone is correct

B)        III alone is correct

C)        I alone is correct

D)        II alone is correct

Answer: (A)

306.    What is the cause for deforestation?

            A)        Destruction

            B)        Rapid explosion of human and livestock population

C)        Loss of green wealth

D)        None of these

Answer: (B)

307.    How soil get eroded?

            A)        By collection of wastes      

            B)        By disposal of wastes

C)        By floods and rains

D)        By mechanical methods

Answer: (C)

308.    The shape of Human Immuno Deficiency Virus (HIV) is

            A)        Spherical in shape                         

B)        Rod like in shape

C)        Spiral like in shape                 

D)        Comma like in shape

Answer: (A)

309.    Match List I with List II correctly and select your answer using the

codes given below:

            List I                                       List II

            a)         Virus                                       1.  Robert Hooke

b)         Bacteria                                 2.  Robert Brown

            c)         Nucleus                                 3.  Dimitry Ivanowsky

d)         Cell                                        4.  Anton van Leeuwenhoek

Codes:

                        a          b          c          d

            A)        3          4          2          1

            B)        4          2          1          3

            C)        1          2          3          4

            D)        2          3          4          1

Answer: (A)

310.    Polyploidy is most common in

            A)        Animal Kingdom

            B)        Plant Kingdom

C)        Fungi

D)        Protista

Answer: (D)

311.    The Blue-green algae are

            A)        Photoheterotrophs

            B)        Photoautotrophs

C)        Chemoautotrophs

D)        Chemoheterotrophs

Answer: (B)

312.    Which of the following acts as a coenzyme?

            A)        Zn⁺⁺                                       B)        Lipase

C)        Pyridoxin                              D)        Lysine

Answer: (C)

313.    The phenotypic ratio of monohybrid cross is

            A)        1  :  1  :  1  :  1           B)        1  :  2  :  1

C)        3  :  1                         D)        1  :  1

Answer: (A)

314.    Smallest measuring unit in cytology is

            A)        micron                                    B)        mm

C)        angstrom                               D)        rem

Answer: (C)

315.    It is believed that live evolved in its early stage under oxygen-free

            condition. Which of the following organisms might have been able

            to survive in that environment?

            A)        Obligate anaerobic bacteria

            B)        Obligate halophytes

C)        Lichens

D)        Thermophilic algae

Answer: (A)

316.    A scientist kept 72 generations of Drosophila in darkness. Even

            after 72 generations, files had normal eyes. This disapproves the

            theory of

            A)        natural selection                             

B)        sexual selection

C)        use and disuse                          

D)        artificial selection

Answer: (C)

317.    The lower region above the earth’s surface is called

            A)        Stratosphere                     B)        Ozone layer

C)        Troposphere                      D)        Atmosphere

Answer: (C)

318.    In Bonellia a marine worm, the male develops from a larva which

            A)        settles in the canal of sponges

B)        attaches to the uterus of female

C)        settles in the long proboscis of female

D)        secretes a chemical substance

Answer: (C)

319.    Spermatids derive the nourishment from

            A)        nucleus

B)        cytoplasm

C)        ciliated epithelial cell

D)        radioactive pollution

Answer: (C)

320.    Acid rain results from

            A)        thermal pollution

B)        land pollution

C)        air pollution

D)        radioactive pollution

Answer: (C)

321.    One of the characteristics that differentiates prokaryotes from

eucaryotes is

            A)        RNA

B)        DNA

C)        Protein

D)        radioactive pollution

Answer: (C)

322.    Match List I (Pathogens) with List II (Diseases) correctly and select

your answer using the codes given below:

            List I                                                   List II

       (Pathogens)                                          (Diseases)

            a)         Entamoeba histolytica             1.  Whooping cough

b)         Clostridium tetani                      2.  Amoebiasis

            c)         Bordetella pertussis                   3.  Filariasis

d)         Wuchereria bancrofti                 4.  Tetanus

Codes:

                        a          b          c          d

            A)        2          4          1          3

            B)        2          4          3          1

            C)        4          2          1          3

            D)        2          1          3          4

Answer: (A)

323.    Which of the following is correctly matched?

            A)        Helps in breathing               -  Stomach

B)        Stores R.B.C.                        -  Spleen

C)        Stores glycogen                   -  Diaphragm

D)        Protein digestion

occurs here                           -  Liver

Answer: (B)

324.    Oxytocin is secreted by

            A)        adrenal gland                       B)        pituitary

C)        ovary                                      D)        testis

Answer: (B)

325.    Which of the following is correctly matched?

            A)        Coeloblastula     -  Bilateral symmetry

B)        Disco blastula     -  Pig embryo

C)        Placenta             -  Extra embryonic membrane

D)        Epibodly         -  Movement of cells during embryo formation

Answer: (D)