Monday, April 28, 2014

09-CELL-THE UNIT OF LIFE

1.       Bacterial staining technique is developed by
          1) Robert Brown           2) A.V. Leeuwenhoek  3) Christian gram          4) Robert Hooke
2.      Neighbouring cells of a tissue are glued together with the help of
          1) Middle lamellum      2) Primary wall             3) Secondary wall         4) Tertiary wall
3.      Lignification and suberization results in the formation of
          1) Primary wall             2) Middle lamellum      3) Secondary wall         4) Tertiary wall
4.       Choose the incorrect match from the following
          1) RBC – round, biconcave -                   2) Bacteria – rod shaped - 
          3) Nerve cell – amoeboid -                          4) Mycoplasma – variable shapes - 
5.       Although each layer of the cell envelope in bacteria performs specific function, they all together help in
          1) Protection                 2) Attachment               3) Osmoregulation        4) Motility
6.       The chemical composition of vesicles, tubules and lamellae of a bacterial cell is/are
          1) Phospholipids and proteins                            2) Proteins only
          3) Carbohydrates and nucleic acids                   4) Amino sugars and proteins
7.       Assertion (A) : Extensive compartmentalization of cytoplasm is observed in eukaryotic cells
          Reason    (R) : Cytoplasm of eukaryotic cells possess membrane bound organelles
          1) Both A and R are correct and R is the correct explanation of A.
          2) Both A and R are correct but R is not the correct explanation of A.
          3) A is True but R is False.                                 4) R is True but A is False.
8.       Structures observed both in prokaryotic and eukaryotic cells are
          1) Ribosomes, cytoplasm, plasma membrane    
          2) Ribosomes, membrane bound cell organelles, cytoplasm
          3) Ribosomes, microbodies, vacuoles
          4) Ribosomes, nucleus, membrane bound cell organelles
9.       Place the following cells in increasing order of their size
          A) Viruses           B) PPLO            C) Bacteria        D) Mycoplasmas           E) Human RBC
          1) A B D C E                2) A C B D E                3) E C D B A                4) B D C E
10.     The percentage of proteins and lipids in plasma membrane (respectively) of erythrocytes is
          1) 52% and 40%           2) 40% and 57%           3) 60% and 40%           4) 57% and 40%
11.     Cell wall was first observed by
          1) Robert  Hooke  in oak plant                           2) Robert Brown in Tradescantia
          3) Robert Hooke in Tradescantia                       4) Leewenhoek in Bacteria
12.     Phospholipids, glycolipids, cholesterol, transmembrane protein, glycoprotein, peripheral protein, carbohydrates act as structural or functional unit of this cell component namely
          1) Cell wall                   2) Glycocalyx               3) Plasma membrane     4) Cytoplasm
13.     Few ions or molecules are transported across the membrane through A against their concentration gradient which is an energy dependent process called B. Many molecules move across the membrane without any energy requirement through C. Neutral solutes move across the membrane by D
          Correct representation of A, B, C, D in above paragraph is
          1) carrier protein, active transport, passive transport, simple diffusion
          2) passive transport, carrier protein, simple diffusion, active transport
          3) simple diffusion, active transport, carrier protein, passive transport  
          4) active transport, simple diffusion, passive transport, carrier protein
14.       Carotenoid pigments are found in
            1) Chloroplasts            2) Chromoplasts      3) Leucoplasts                 4) 1 & 2
15.       Assertion(A): ER, Golgi complex, lysosomes and vacuoles together called endomembrane system.
            Reason(R): ER, Golgi complex,lysosomes and vacuoles function in a co-ordinated manner
            1)  A and R are true and R explains A           2) A and R are true but R does not explains A                      3) A is true but R is false                                    4) A is false but R is true
16.     The macro cell organelle (reported by Porter) that divides intra cellular space as luminal and extra luminal compartments is
          1) Golgi complex          2) ER                           3) Lysosomes              4) Vacuole
17.     Steroidal hormones are synthesized in
          1) Ribosomes                2) Golgi complex                   3) SER                        4) RER
18.       What is true about ER?
          I) ER was discovered by K.R Porter.
          II) RER has 70S ribosomes attached on its surface.
          III) SER is without ribosomes
          IV) RER is frequently observed in the cells actively involved in protein synthesis and secretion
          1) I,II,III                       2) I,III,IV                    3) II,III,IV                             4) I,II,IV
19.     Assertion (A): RER is involved in protein synthesis
          Reason(R): Prokaryotes don’t synthesize proteins as they are without ER
            1)  A and R are true and R explains A           2) A and R are true and R does not explains A                      3) A is true but R is false                          4) A is false but R is true
20.       Golgi apparatus is important for
            I) Synthesis of glycoproteins             II) Synthesis of glycolipids
            III) Synthesis of cell wall materials              IV) Modification of lipids synthesized in SER
            1) I & IV Only            2) II & IV only                       3) III & IV only          4) I,II , III & IV
21.       The seat of nucleases, proteases, lipases and carbohydrases in the eukaryotic cell
            1) Vacuole                   2) Golgi complex                    3) ER                           4) Lysosomes
22.       The volume occupied by vacuole in plant cells is
            1) 60%                         2) 70%                                     3) 90%                         4) 50%
23.       Power house of the cell is
          1) Mitochondrion              2) Plastids                           3) Lysosomes              4) Vacuole
24.       Assertion(A): Mitochondria duplicate themselves by fission
          Reason(R): Mitochondria have their own circular DNA, 70S ribosomes and RNA
          1)  A and R are true and R explains A 2) A and R are true but R does not explains A                                  3) A is true but R is false              4) A is false but R is true
25.       Match the following lists
          A) Amyloplasts                        1) Fats
          B) Elaioplasts                           2) Starch
          C) Aleuroplasts                        3) Anthocyanin
          D) Chromoplasts                     4) Carotenoids
                                                            5) Proteins
          1) A-1,B-2,C3,D-5        2) A-2,B-1,C-5,D-4    3) A-5,B-4,C-3,D-1    4) A-3,B-2,C-4,D-5
26.       The number of chloroplasts per mesophyll cell is
          1) 10-30                         2) 20-40                       3) 30-60                       4) 5-15
27.    The enzymes of stroma of chloroplast are useful for  synthesis of                                                              I) Peptidoglycan  II) Carbohydrates     III) Proteins               IV) Chitin
          1) I & II                                    2) II & III                   3) III & IV                  4) I & IV
28.  Which of the following is not a correct match?
       1) Contractile vacuole of Amoeba – Excretion   
       2) Lysosomal enzymes – Optimally active at acidic PH
       3) Smooth E.R – Synthesis of steroidal hormones                                    
       4) Centrioles – Non-membranous organelles found in all eukaryotic cells
29.  The fluid nature of cell membrane is important for
       I) Formation of intercellular junctions              II) Cell division           
       III) Endocytosis                                                   IV) Secretion
       1) I, II, III & IV              2) II & III only             3) II, III & IV only       4) I, II, III only
30.  Assertion (A): Microbodies found in mycoplasmas are single membrane bound structures
       Reason (R): Mycoplasmas are prokaryotes
       1) Both ‘A’ and ‘R’ are true and ‘R’ is correct explanation to ‘A’.
       2) Both ‘A’ and ‘R’ are true but ‘R’ is not correct explanation to ‘A’

       3) ‘A’ is false but ‘R’ is true                                 4) ‘A’ is true but ‘R’ is false

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Asthra