Chapter 8 Cell – The Unit of Life MCQs for Class 11 Biology
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Q 1.: Cell membranes are composed mainly of
(A) Sugar and proteins
(B) Lipids and proteins
(C) Starch and lipids
(D) Sugar and lipids
Q 2.: The important barrier between the protoplasm and the outer environment in an animal cell is
(A) Cell wall
(B) Plasma membrane
(D) Nuclear membrane
Q 3.: According to ‘Fluid mosaic model’, plasma membrane is composed of
(A) Cellulose and hemicellulose
(B) Phospholipids and hemicellulose
(C) Phospholipids, extrinsic and intrinsic proteins
(D) Phospholipids and integral proteins
Q 4.: The scientist who proposed the concept of unit membrane for three-layered structure of lipoprotein was
(C) Davson and Danielli
Q 5.: The active transport of substances across the membranes is aided by
(A) Electrochemical gradient
(B) Metabolic energy
Q 6.: The first team of scientists to propose a molecular model of plasma membrane was
(A) Virchow and Hooke
(B) Danielli and Davson
(C) Robertson and Dutrochet
(D) Singer and Nicholson
Q 7.: The active transport of substances across plasma membrane is enhanced by
(C) Electrochemical gradient
(D) Incipient plasmolysis
Q 8.: Passive transport includes
(A) Osmosis only
(B) Diffusion only
(C) Facilitated diffusion
(D) All of these
Q 9.: When the relative concentration of water and solutes on either side of the cell membrane is the same, the solution is said to be
(D) None of the these
Q 10.: The hydrostatic pressure that balances and prevents osmotic inflow of water molecules into the concentrated solution across the membrane is called
(A) Turgor pressure
(B) Osmotic pressure
(C) Wall pressure
(D) Suction pressure
Q 11.: The process for active cellular extrusion from the cell is said to be
Q 12.: Shrunken appearance of erythrocytes is called
(B) Incipient plasmolysis
Q 13.: which one of the following refers to endocytosis?
Q 14.: The protrusions developed by fibroblasts are called
(C) Ruffles or undulation
Q 15.: Which one of the following maintains continuity between the water ad lipid phases inside and outside the cells?
(A) Cell wall
(C) Cell vacuole
(D) Cell membrane of woody plants
Q 16.: Two animal cells are interconnected by
(B) Cell wall
(D) Plasma membrane
Q 17.: The membrane potential of cell favours the
(A) Movement of cations into the cell
(B) Movement of anions into the cell
(C) Action of a proton pump
(D) Action of an electrogenic pump
Q 18.: A nucleosome is a portion of the chromonema containing
(A) Only histones
(B) Both DNA and histones
(C) Only DNA
(D) Both DNA and RNA
Q 19.: Which one is single membrane cell organelle?
(A) Endoplasmic reticulum
Q 20.: In which one of the following would you expect to find glyoxysomes?
(A) Endosperm of wheat
(B) Endosperm of castor
(C) Palisade cells in leaf
(D) Root hairs
Q 21.: Term ‘Basal body’ is associated with the development of
(A) Cilia and flagella
(B) Cell plate
Q 22.: Which one of the following is not a function of vacuole in plant cell?
(B) Waste disposal
(C) Cell elongation and protection
(D) Production of hydrogen peroxide
Q 23.: Which is not true about prokaryotes ?
(A) DNA is complexed with histones
(B) Well-developed nucleus absent
(C) Mesosome present
(D) Mitochondria absent
Q 24.: Robert Hooke thought about the cells that
(A) Something similar to veins and arteries of animals for conducting fluid
(B) Smallest structural unit
(C) Smallest functional unit
(D) Unit of heredity
Q 25.: Which one of the following enzymes helps in crossing plasma membrane?
Q 26.: The statement omnis cellula e cellula of Rudolf Virchow has been taken from his book
(A) Cellular pathology
(B) Cellular potency
(D) Scala naturae
Q 27.: Which one of the following is the site of lipid synthesis?
(A) Rough ER
(B) Smooth ER
(C) Golgi bodies
Q 28.: Function of rough endoplasmic reticulum is
(A) Fat synthesis
(B) Protein synthesis
(C) Starch synthesis
Q 29.: Which of the following pairs lack the unit membrane?
(A) Nucleus and ER
(B) Mitochondria and chloroplast
(C) Ribosome and nucleolus
(D) Golgi body and lysosome
Q 30.: Which one of the following is not a constituent of cell membrane?
Q 31.: Nucleic acid occurs in
(A) Golgi body
(D) Mitochondria and chloroplast
Q 32.: The term ‘cytoplasm’ and ‘nucleoplasm’ were given by
Q 33.: Lipid molecules in plasma membrane are arranged in which manner?
(D) Head parallel
Q 34.: In flagella membrane, which enzyme catalyses ATP activity?
(A) Cytoplasmic dynein
(B) Asconic dynein
Q 35.: Number of protofilament in microtubule is
Q 36.: Movement of cytoplasm around the vacuole in the cell is
Q 37.: Which of the following techniques, other than microscopy is used for study of cell?
Q 38.: Who developed election microscope for the first time ?
(A) Knoll and Ruska
(B) Rudolf and Kolliker
(C) Robert Hooke
Q 39.: Robert Hooke used the term ‘cell’ in the year
Q 40.: ‘Fluid mosaic model’ of cell membrane was given by
(A) Singer and Tatum
(D) Singer and Nicolson
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