Tuesday, March 10, 2015

CELL: THE UNIT OF LIFE MCQ,S

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
31.  Read the following statements
       A: Enzymes are found in the outer and inner membranes of mitochondria
       B: In prokaryotes ribosomes are associated with the plasma membrane of the cell
       The correct answer in
       1) A true, B false             2) A false, B true          3) A false, B false         4) A and B true
32.  The primary role of a lysosome is
       1) Lipid transport                                                  2) Intra cellular digestion      
       3) Phospholipid synthesis                                     4) Carbohydrate storage
33.  Assertion (A): In plant cells concentration of ions and some other materials is significantly high in the vacuole than in cytoplasm
       Reason (R): Tonoplast facilitates the transport of several ions and other materials against concentration gradient in to vacuole
       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 true but ‘R’ is false                                 4) ‘A’ is false but ‘R’ is true
34.  Which statement about plastids is false?
       1) Fat soluble light absorbing pigments are found in chloroplasts and chromoplasts
       2) Inner chloroplast membrane is relatively less permeable than the outer membrane
       3) Ribosomes of chloroplast provide space as well as enzymes for protein synthesis
       4) Membranes of stroma lamellae do not contain photosynthetic pigments
35.  Read the following lists
List-I
List-II
I) Fimbriae
A) Antibiotic resistant genes
II) Chromatophores
B) Cell wall formation
III) Mesosome
C) Membranous extensions having pigments
IV) Plasmid
D) Attachment of bacteria to host tissue

E) Buoyancy
           I         II        III        IV                                                I     II        III      IV
       1) C       A        D         B                                             2) D   C        A       B
       3) D       C        B         A                                             4) E    D        A       C
36.  Read the following lists
List-I
List-II
I) Single membrane bound organelles included in endomembrane system
A) Golgi
II) Double membrane bound organelles of eukaryotic plant cells not included under endomembrane system
B) E-R
III) Single membrane bound organelles not included in endomembrane system
C) Chloroplast
IV) Organelles concerned with synthesis of glycoproteins and glycolipids included in endomembrane system
D) Peroxisome

E) Lysosome
            I         II         III        IV                                                              I        II         III      IV       
       1) E         C         D         A                                                            2) E     C         D        B
       3) D        C         A         B                                                            4) D     A         B        C


37.  Algal cell walls contains
       I) Galactans                    II) Mannans                 III) Cellulose                IV) Calcium carbonate
       1) I & II only                   2) I, II & III only          3) II, III and IV only    4) I, II, III, IV
38.  Assertion (A): Carrier proteins facilitate the transport of polar molecules across the cell membrane
       Reason (R): Transport mediated by carriers is always active
       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 true but ‘R’ is false                                 4) ‘A’ is false but ‘R’ is true
39.  Which of the following statements are correct with reference to cell membrane?
       A) Hydrophilic heads of lipids are towards outside and hydrophobic tails are towards the inner part
       B) Quasi fluid nature of lipids enables lateral movement of proteins with in the bilayer
       C) Neutral solutes can move across the membrane by simple diffusion along concentration gradient
       1) A & B                         2) A & C                       3) B & C                       4) A, B, C
40.  Cell envelope of bacterium is made up of
       1) Glycocalyx and cell membrane                         2) Capsule and slime
       3) Glycocalyx, slime and cell wall                        4) Glycocalyx, cell wall and cell membrane
41.  Assertion (A): Lysosomes contain enzymes that lack macro molecular specificity
       Reason (R): Lysosomal enzymes act best at the acidic PH
       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 true but ‘R’ is false                                 4) ‘A’ is false but ‘R’ is true
42.  Read the following statements
       I) Cisternae are arranged concentrically near the nucleus                  
       II) It divides the intra cellular space into luminal and extra luminal compartments
       III) It functions as packing house of cell
       IV) Proteins produced by ribosomes of E-R are modified in it
       The true statements about golgi are
       1) I & II                           2) I, II & III                  3) II, III & IV               4) I, III & IV
43.      Movement of Chromosomes during cell division is due to                                                             
          1) Cilia                           2) Flagella                     3) Cytoskeleton            4) Centromeres                   
44.    Triple helical structure of collagen was discovered by
          1) P. Maheswari                                               2) G. N. Ramachandran
          3) Nirenberg                                                     4) H. G. Khorana
45.    Incorrect statement of the following is
          1) Membrane bound cell organelles are absent in prokaryotic cells
          2) The eukaryotic cells multiply more rapidly than the prokaryotic cells
          3) The reserve food materials in prokaryotic cells are stored in the cytoplasm in the form of inclusion bodies
          4) The hypothesis of schleiden & Schwann was modified by Rudolf Virchow
46.    Axoneme is
          1) Chromatin material of chromosome        2) Central proteinaceous cylinder of a centriole
          3) The core of nucleosome                             4) The core of flagellum
47.    Select the incorrect statement/s from the following
          A. Chromatin contains DNA and some acidic proteins called histones
          B. Glyoxysomes contain enzymes of glycolate metabolism
          C. Plastids are found in Euglenoids also
          D. Trans-face of golgi complex is also called maturing face
          1) A & B only             2) C & D only             3) A, B & C only        4) A, B, C & D


48.    Match the following
          List – I                         List – II
          A. Centriole                I. Translate m-RNA into proteins
          B. Golgi apparatus   II. Convert lipids to carbohydrates
          C. Cytoskeleton         III. Forms basal body
          D. Ribosomes             IV. Glycosidation of proteins and lipids
          E. Glyoxysomes         V. mechanical support
          The correct match is
                           A      B      C      D               E                  A      B      C      D      E
          1)     III     IV     V      II       I                 2)        III     IV     V      I        II
          3)     II       III     IV     I        II                4)        IV     I        II       III     V
49.    Assertion (A) : The stroma of the chloroplast contains enzymes required for the synthesis of carbohydrates and proteins
          Reason (R ) : 70s ribosomes are present in the chloroplast
          1) Both A and R are true and R is the correct explanation of A
          2) Both A and R are true and R is not the correct explanation of A
          3) A is true and R is false                                   4) A is false and R is true
50.    It is involved in signaling across the cell

          1) Cytoskeleton          2) E.R                           3) Golgi complex       4) Lysosome

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