Cell & Cell Division Part IV

1) The continuity of cytoplasm from cell to cell is maintained through
a) Middle lamella
b) Plasmodesmata
c) Endoplasmic reticulum
d) Cell membrane system

2) The figures of the cork cell as seen by Robert Hooke were published in
a) Origin of species
b) Species plantarum
c) Micrographia
d) Plant kingdom

3) The cell and cell wall was discovered by
a) Robert Hooke
b) Robert Brown
c) Anton Von Leeuwenhoek
d) Carolus Linnaeus

4) The innermost layer of the cell wall is the
a) Middle lamella
b) Plasma membrane
c) Tertiary wall
d) Secondary wall

5) The cell wall of fungi is commonly made up of
a) Cellulose
b) Chitin
c) Cutin + cellulose
d) Phospholipids

6) The peptidoglycan polymer forms the cell wall of
a) Fungi
b) Eukaryotes
c) Prokaryotes
d) Higher plants

7) Lignin is the main constituent of the
a) Primary wall
b) Secondary wall
c) Middle lamella
d) Plasmalemma/Pit membrane

8) How does the wall of a plant cell grow when a plant elongates?
a) By intussusception
b) By apposition
c) By any of the method
d) By none of the above method

9) Electron microscope revealed that cell walls are made up of a number of layers of
a) Micelles
b) Microfibrils
c) Microtubules
d) Tonofibrils

10) Fruit soften on maturity due to the
a) Conversion of starch into sugar
b) Loss of pectate in middle lamella
c) Incorporation of pectate in middle lamella
d) Gel formation at acid pH

11) Unripe fruits are hard due to the presence of a
a) Lignified walls
b) Middle lamella
c) Tannin and bitter compounds
d) Acid and carbohydrates

12) The chief mineral component of the middle lamella in plant cells is
a) Mg
b) Na
c) Ca
d) K

13) An example of a cell lacking a nuclear membrane and mitochondria is the
a) Protozoan cell
b) Bacterial cell
c) Algal cell
d) Fungal cells

14) Mark the incorrect statement:
a) All cells do not contain a true nucleus
b) Respiration occurs in mitochondria
c) Cell walls are generally made up of cellulose
d) All living plant cells contain chlorophyll

15) Cellulose is a
a) Amino acid
b) Polysaccharide
c) Liquid
d) Protein

16) Which of the following structures performs a similar function in both plant and animal cells?
a) Chloroplast
b) Centrosome
c) Cell membrane
d) Cell wall

17) What is the latest model that is proposed to explain the structure of the plasma membrane?
a) Molecular model
b) Unit membrane model
c) Fluid mosaic model
d) None of these

18) The plant cell wall is generally made up of
a) Cellulose only
b) Cellulose and pectin
c) Chitin
d) Murin

19) The ultrastructure of the plasmalemma (fluid mosaic model) was proposed by
a) Robertson
b) Davson and Danielli
c) Singer and Nicholson
d) Vandenheuvel

20) What happens when cells of five different tissues are mixed?
a) All of them become clumped together
b) They become clumped into five discrete units
c) They become fused to form polypoids
d) Nothing happens

21) According to the carrier concept, ion transport across the cell membrane is
a) A passive process
b) An active process
c) An osmotic process
d) A non osmotic process

22) Which of the following functions of the cell membrane make it living?
a) Selective permeability
b) Energy transduction
c) Conduction of electrical impulses
d) All the above

23) The tonoplast is a differentially permeable membrane surrounding the
a) Mitochondria
b) Cytoplasm
c) Vacuole
d) Nucleus

24) The cell organelle found only in plants is the
a) Mitochondrion
b) Golgi complex
c) Ribosome
d) Plastid

25) Which one of the following is a prokaryote?
a)
b)
c)
d) Bacteriophage

26) The outermost layer of the cell wall is the
a) Middle lamella
b) Plasmalemma
c) Primary wall
d) Secondary wall

27) Which of the following represents the correct sequence of the relative size in the descending order?
a) Chromosome, cell, nucleus, water molecule, oxygen atom
b) Cell, nucleus, chromosome, water molecule, oxygen atom
c) Cell, nucleus, water molecule, oxygen atom, chromosome
d) Nucleus, water molecule, cell chromosome, oxygen atom

28) Basal bodies are associated with the development of the
a) Cell plate
b) Cilia and flagella
c) Kinetochore
d) Phragmoplast

29) Living cells cannot be observed under the electron microscope because
a) They lose water vapour and disturb the vacuum of the microscope
b) The heat generated by electrons is injurious for the cell
c) They are transparent and, therefore, not visible
d) They are killed by beam of electrons

30) DNA is present in the
a) Nucleus only
b) Mitochondria only
c) Chloroplast only
d) All the above

31) Food is converted to energy in the
a) Nucleus
b) Nucleolus
c) Mitochondria
d) Chloroplast

32) Oxysomes are found attached to the
a) Outer membrane of a mitochondrion
b) Inner membrane of a mitochondrion
c) Outer membrane of chloroplast
d) Inner membrane of chloroplast

33) In which part of a mitochondrion is the ATP formed?
a) Matrix
b) Mitoribosomes
c) Oxysomes
d) Outer cavity

34) What is the characteristic enzyme present in the stroma?
a) Catalase
b) Peroxidase
c) RuDP carboxylase
d) Pyruvate decarboxylase

35) Extranuclear DNA occurs in the
a) Oxysome and ribosome
b) ER and dictyosome
c) Golgi bodies and chloroplast
d) Chloroplasts and mitochondria

36) When green tomatoes turn red
a) Chromoplasts are changed into chloroplasts
b) Chloroplasts are disintegrated and get converted into chromoplasts
c) New chromoplasts are made
d) None of these

37) Which of the following is naked and not a membrane bound organelle?
a) Ribosome
b) Nucleus
c) Mitochondria
d) Chloroplast

38) Lysosomes are known as suicidal bags because of their
a) Phagocytic activity
b) Hydrolytic enzymes
c) Parasitising on nucleus
d) Proteolytic enzymes

39) DNA is absent in one of the following
a) Nucleus
b) Mitochondria
c) Peroxisomes
d) Chloroplasts

40) The plane of cell wall formation in a dividing cell is determined by
a) Microtubules
b) Endoplasmic reticulum
c) Golgi apparatus
d) Microfilaments

41) Euchromatin is the
a) Less active darkly staining region of the chromatin
b) Less active lightly staining region of the chromatin
c) More active darkly staining region of the chromosome
d) More active weakly staining region of the chromatin

42) The activities of a cell are controlled by the
a) Plasmalemma
b) Mitochondria
c) Nucleus
d) Ribosomes

43) An autosome is
a) A chromosome other than the sex chromosome
b) Achromatic
c) A sex chromosome
d) None of these

44) If the centromere of a chromosome is near the middle in position, it is called
a) Metacentric
b) Acrocentric
c) Submetacentric
d) Telocentric

45) Which of the following has only DNA instead of chromosomes?
a)
b)
c)
d)

46) The shape of chromosomes can be clearly observed during
a) Metaphase
b) Anaphase
c) Telophase
d) Prophase

47) A chromosome with a terminal centromere is called
a) Acrocentric
b) Telocentric
c) Metacentric
d) Polycentric

48) The function of the centromere is
a) Formation of DNA
b) Replication of DNA
c) Movement of the chromosomes to the poles
d) Duplication of chromosomes

49) Another name for the kinetochore or centromere is the
a) Primary constriction
b) Secondary constriction
c) SAT region
d) Nucleolous organizer

50) Which of the following chromosome is a Sat-chromosome (satellite chromosome)?
a) Sex chromosomes
b) Nucleolus organizer chromosomes
c) Non-nucleus organizer chromosome
d) All of these

51) The diagrammatic representation of the chromosomes of an organism arranged in decreasing order to their size is called
a) Karyotype
b) Idiogram
c) Genotype
d) Genome

52) A complete set of chromosomes inherited as a unit is called a
a) Karyotype
b) Genotype
c) Genome
d) Plasmone

53) Which of the following is a Robertsonian change?
a) Conversation of telocentric chromosome into isocentric
b) Conversion of metacentric chromosome into two telocentrics
c) Both A and B
d) Loss of a chromosome

54) The polytene chromosomes were discovered for the first time in
a)
b) Fruit fly
c)
d) Housefly

55) If living cells similar to those found on earth were found in another planet
where there was no
, which cell organelle would most likely be absent?

a) Cell nucleus
b) Mitochondria
c) Cell membrane
d) Chromosomes or DNA

56) The 80S ribosomes are made up of
a) 30S and 50Ssubunits
b) 40S and 40S subunits
c) 40S and 60S subunits
d) 20Sand 60S subunits

57) Most plant cells are surrounded by a cell wall. There are some exceptions,
for example

a) Root hairs
b) Bacteria
c) Stem hairs
d) Gametes

58) The foldings of the inner mitochondrial membrane are
a) Cristae
b) Oxysomes
c) Matrix
d) Microsomes

59) The phragmoplast is the precursor of the
a) Cell plate
b) Chromoplast
c) Chloroplast
d) Colourless plastid

60) The core of the nucleosome is made up of
a) DNA
b) Non histones
c)
d)

61) The Golgi apparatus is absent in
a) Liver cells
b) R.B.C. (Red blood cells)
c) Blue-green algae
d) Both b and c

62) In mitochondria, cristae act as sites for the
a) Breakdown of macromolecules
b) Oxidation-reduction reaction
c) Protein synthesis
d) Phosphorylation of flavoproteins

63) Which one of the following organelles is located near the nucleus and
contains a collection of flattened membrane bound cisternae?

a) Golgi apparatus
b) Centriole
c) Nucleolus
d) Mitochondrion

64) Besides giving out secretory vesicles, the Golgi apparatus is also concerned
with the formation of

a) Grana of chloroplasts
b) Cell plates after cell division in plants
c) Lysosomes
d) Plastids

65) The fluid mosaic model of cell membrane structure describes
a) a mosaic model of cell membrane
b) a semi-fluid model smeared in a unit membrane
c) a bilayer lipid model
d) a protein – phospholipid bilayer cell structure with mobility

66) The major driving force for the formation of the membrane lipid bilayer is
a) van der Waal forces
b) Electrostatic forces
c) Hydrophobic interactions
d) Hydrogen bonding

67) Glycoproteins are known to play an important role in cell recognition. The specificity of this recognition is largely provided by the
a) lipid portion of glycoproteins
b) protein portion of glycoproteins
c) carbohydrate portion of glycoprotein
d) both carbohydrate and protein components of glycoproteins

68) Which one of the following is not a property of the cell membrane?
a) The inner and outer membrane faces are different
b) Membranes are selectively permeable
c) It contains equimolar amounts of lipids and proteins
d) It controls flow of information from one cell to another

69) The typical biomembranes of all cell types are
a) unilaminar
b) bilaminar
c) trilaminar
d) quadrilaminar

70) The term used for the covering of slime moulds, mycoplasmas or amoeba is plasmalemma, also called the
a) cell wall
b) micro-fibrils
c) plasma membrane
d) middle lamella

71) The plasma membrane of an animal cell is elastic due to the presence of
a) lipids
b) carbohydrates
c) proteins
d) water

72) The thickness of the phospholipid bilayer of a typical plasma membrane is
a)
b)
c)
d)

73) A prokaryotic cell membrane is made up of
a) sugar and proteins
b) sugar and lipids
c) lipids and proteins
d) sugar and glycolipids

74) The main difference between the animal and plant cell after death is that the
a) animal cell shrinks but never dies
b) animal cell remains the same shape because of the glycolipids
c) plant cell remains the same shape because of the rigid cell wall
d) none of the above

75) The first molecular/lamellar model of cell membrane was proposed by
a) Ribertson
b) Danielli – Davson
c) Overton
d) Singer and Nicholson

76) Which of the following structure is not bounded by a cell membrane?
a) Spherosomes
b) Mitochondria
c) Ribosomes
d) Lysosomes

77) In a eukaryotic cell, which structure is characterized by selective permeability?
a) chemical composition of cell wall
b) cell membrane
c) permeability of cell wall
d) all the above

78) In Robertson’s model of the plasma membrane
a) only the outer layer is opaque
b) only the inner layer is opaque
c) the middle layer is transparent
d) the inner layer is transparent

79) Tonoplast is a differentially permeable membrane, which surrounds the
a) cytoplasm of prokaryotes
b) mitochondria
c) nucleus of eukarytoes
d) vacuole

80) Which one of the following pairs can you trace in both plant and animal cells?
a) Cell membrane and nucleus
b) Cell membrane and cell wall
c) Nucleus and cell wall
d) Nucleolus and chloroplast

81) Plasmagel is a term used for the … of protistans
a) plasma membrane
b) endoplasm
c) protoplasm
d) cell wall

82) Plasmodesmata were discovered and named respectively by
a) Tangl and Strasburger
b) Strasburger and Plows
c) Altman and Benda
d) Strasburger and Golgi

83) The most satisfactory model of the cell membrane explaining its functional
aspects has been given by

a) Robertson
b) Danielli
c) Davson
d) Singer and Nicholson

84) The plasmalemma is
a) selectively permeable
b) non-permeable
c) permeable
d) semi-permeable

85) Engulfing of food material or foreign bodies is called
a) pinocytosis
b) phagocytosis
c) exocytosis
d) endocytosis

86) Singer and Nicholson model of plasma membrane differs from Robertson’s model in the
a) number of lipid layers
b) arrangement of lipid layers
c) arrangement of proteins
d) absence of proteins in Singer model

87) Ions enter the cell through the plasma membrane by means of
a) some carriers present in the membrane
b) the cytochrome pump across the membrane
c) the phosphatidic acid cycle
d) all the above

88) Which does not require a carrier for its transport through the plasma membrane ?
a) Simple diffusion
b) Facilitated diffusion
c) Active transport
d) Na-K pump mechanism

89) According to the carrier concept the transport of ions across the
membrane is an

a) passive process
b) active process
c) osmotic process
d) anosmotic process

90) Which of the following can diffuse easily through a non-polar membrane?
a)
b) proteins
c) lipids
d) both a and c

91) The thickened parts of the plasma membrane with radiating protein tubules
are called

a) terminal bars
b) desmosomes
c) interdigitations
d) tight junction

92) Amphipathy means the
a) presence of hydrophilic and hydrophobic ends
b) presence of a hydrophilic end
c) presence of a hydrophobic end
d) none of the above

93) Pinocytosis and active transport are similar because both processes
a) increase absorption
b) require energy
c) depend upon cytosis
d) all above

94) Which one of the following models of plasma membrane suggested that
molecules show globular arrangement?

a) Lattice model
b) Fluid mosaic
c) Bimolecular leaflet
d) Micellar model

95) Emeiocytosis is another term for
a) pinocytosis
b) phagocytosis
c) reverse endocytosis
d) all above

96) In certain animal cells, as in pancreatic cells, the zymatic secretions
are passed out with the help of the plasma membrane, which is called

a) exocytosis
b) cell vomiting
c) emeiocytosis
d) all the above

97) The term plasma membrane was given by
a) Robertson
b) Nageli
c) N. Grew
d) Danielli and Davson

98) When an RBC is placed in 0.5 M solution of sucrose its volume does
not alter, but if the same cell is placed in 0.5 M solution of
sodium chloride the volume of the cell

a) increases
b) decreases
c) will be plasmolysed
d) do not show change

99) The main function of a plasma membrane is to
a) help in locomotion of cells
b) allow only lipids to pass through
c) prevent water from entering or leaving the cell
d) control the movement of anything going inside or outside the cell

100) The most abundant class of lipids comprising the plasma membrane
is

a) cholesterol
b) triglycerides
c) steroids
d) phospholipids

Answers

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