Cell & Cell Division MCQs Part I

1) The microscope used to observe structures in living cells is the
a) Compound microscope
b) Electron microscope
c) Oil immersion
d) Phase contrast microscope

2) The resolving power of the human eye is
a)
b)
c)
d)

3) The high resolving power of the electron microscope is due to the
a) Electromagnetic lens
b) Low wave length of electron beam
c) High numerical aperture of glass lens
d) High wave length of electron beam

4) Molecular biology deals with
a) The study of organisms in relation to its environment
b) The study of physicochemical organization of biomolecules
c) The study of the processes and functions of organisms
d) The study of structure, function, reproduction and life history of cells

5) The ability of a microscope to distinguish two closely placed points
is its

a) Distinguishing power
b) Magnifying power
c) Resolving power
d) Video power

6) The technique used to separate molecules of different substances
from a solution or a mixture is

a) Electrophoresis
b) Cell fractionation
c) Calorimetry
d) Chromatography

7) Homogenisation is
a) Breaking of cells and suspending them in 0.5 m sucrose solution
b) Breaking a tissue into cells
c) Crushing a tissue to separate cells from intercellular substance
d) Separation of different cellular components

8)
a)
b)
c)
d)

9) The arrangement of atoms and molecular groups in the large molecules
such as DNA and RNA can be studied using

a) Centrifugation
b) Electron microscope
c) X-ray diffraction
d) Spectrophotometer

10) Separation of chromatids during metaphase or bahviour of chromosomes
during mitosis and meiosis can be best studied by the

a) Phase contrast microscope
b) Scanning electron microscope
c) X-ray microscope
d) Cell fraction methods

11) Cells or organelles can be separated by the technique of
a) X-ray diffraction
b) Auto radiography
c) Differential and gradient centrifugation
d) Thin section microtomy

12) The electron microscope uses
a) Polarizer and analyzer filters
b) Electromagnetic lenses
c) Objective and ocular lenses
d) Fluoro chromes

13) Which of the following cannot be used for scientific observation of
a living cell?

a) Light microscope
b) Phase contrast microscope
c) Fluorescence microscope
d) Electron microscope

14) The best procedure to obtain mitochondria for a biochemical analysis
would be

a) Grind the cells and filter out the mixture and take the debris
b) Subject the cells to cell fractionation (centrifuge) and obtain mitochondria
c) Plasmolyse the cells, filter it and take the debris
d) Select cells that have a large number of mitochondria

15) Which of the following microscopes has the highest resolving power?
a) Fluorescent microscope
b) UV microscope
c) Polarizing microscope
d) Electron microscope

16) The study of the structure, function, life cycle and reproduction of a cell is
a) Histology
b) Anatomy
c) Cytology
d) All of these

17) Which is the most important feature of a microscope?
a) Magnification
b) Resolving power
c) Study of living cell
d) Direct observation

18) Protoplasm is the name of
a) Living cell
b) Living body
c) Living tissue
d) Living matter

19) 1 micron is-
a)
b)
c)
d)

20) A fluorescent microscope is used
a) For increasing resolving power
b) For obtaining X-ray diffraction pattern of DNA
c) To study cells and their components in a living state using a phase difference in the light rays
d) To localize cell structures stained with fluorochromes

21) The maximum magnification possible by light microscope is
a) 200 times
b) 1000 times
c) 2000 times
d) 20,000 times

22) The three dimensional structure of a protein can be elucidated by using
a) Spectrophotometry
b) Electron microscopy
c) X-ray crystallography
d) Stereomicroscopy

23) The transformation from a single cell to an adult individual with many different kinds of cells is called
a) Development
b) Differentiation
c) Adaptation
d) Inheritance

24) The percentage of water by weight in living cells in
a) 70-80%
b) 80-90%
c) 10-20%
d) 50%

25) Which of these is the smallest measurement?
a) 0.1 m
b) 1nm
c)
d) 0.001 mm

26) According to the cell doctrine, all cells arise from
a) Pre-existing cells
b) Inorganic matter
c) Organic matter
d) Any one of the above

27) Amino acids involved in protein synthesis are of 20 types but proteins formed are of innumerable types because
a) Amino acids can be arranged variously to form a large variety of proteins
b) Only 20 types of proteins can be formed
c) Repetitive proteins are present
d) All above

28) The smallest cell known is that of the
a) Pneumococcus-like organism
b) Echerichia coli
c) Ostrich egg
d) Human sperm

29) The rate of sedimentation of a macromolecule is proportional to its
a) Size and weight
b) Weight and shape
c) Shape and size
d) Mass and size

30) The largest cell known is the
a) Onion epidermal cell
b) Human egg
c) Ostrich egg
d) Hydrilla epidermal cell

31) Which of the following is the correct order of sedimentation during differential centrifugation
a) Nucleus &> mitochondria &> lysosome &> ribosome
b) Mitochondria &> nucleus &>lysosome &>ribosome
c) Lysosome &> mitochondria &>nucleus &> ribosome
d) Ribosome &> mitochondria &>nucleus &>lysosome

32) The fundamental building blocks of protein are
a) Deoxyribonucleic acid
b) Ribonucleic acid
c) Glucose
d) Amino acids

33) The number of amino acids of natural origin identified so far in protein or protoplasm are
a) About 10
b) About 20
c) About 25
d) About 40

34) The trapping of light rays by certain gases leads to
a) Increase in global temperature
b) Decrease in global temperature
c) No effect on temperature
d) None of above

35) Proteins are diverse in nature because of the
a) Complexity of amino acids
b) Different arrangement of amino acids
c) Different molecular nature of amino acids
d) Different molecular weight of amino acids

36) “Life results due to a relationship of molecules and is not a property
of any one molecule ” was stated by

a) Huxley
b) Linus Pauling
c) Pasteur
d) Oparin

37) The number of components present in the biomembrane are
a) 3
b) 4
c) 5
d) 2

38) Most substances in the living world are transported across
membranes through the phenomenon of

a) diffusion
b) osmosis
c) both a and b
d) active transport

39) The net movement of water across a semipermeable membrane result
in hydrostatic pressure

a) OP
b) SP
c) TP
d) None of the above

40) Fluid mosaic model exhibits amphipathy because of
a) glycoproteins
b) phospholipids
c) lipids
d) glycolipids

41) Active transport involves
a) the use of metabolic energy
b) passive diffusion
c) simple osmosis
d) any of the above

42) The proteins in biomembranes are responsible for
a) The mosaic nature
b) Antigen specificity
c) Cell to cell recongnition
d) All the above

43) The plasmalemma comprises
a) a monoprotein layer
b) a monolipid layer
c) a bilipid layer and integral proteins
d) a monoprotein and monolipid layer

44) The differentiation of the fluid mosaic model from Robertson’s model is in the
a) lipid molecule arrangement
b) protein molecule arrangement
c) number of lipid layers
d) all the above

45) The entry of mineral ions into a plant cell during diffusion
is by

a) passive absorption
b) active absorption
c) osmosis
d) endocytosis

46) The action potential gradient of a single point in a nerve
membrane is rapidly transferred in all directions. What
kind of feed back effect produces this?

a) Negative
b) Positive
c) Neutral
d) Zero

47) The plasma membrane, particularly in animal cells, is elastic
due to

a) Carbohydrates
b) Proteins
c) Lipids
d) None of the above

48) Cellular membranes occur in
a) bacteria and cyanobacteria
b) all eukaryotes
c) prokaryotes
d) all the above

49) One of the following lacks RNA:
a) ribosomes
b) plasmalemma
c) chromosome
d) nucleolus

50) The plasmalemma prevents the escape of
and
in order to

a) cause disruption in neighbouring cells through desmosomes
b) maintain the electrostatic neutrality of the cells
c) maintain cells
d) all above

51) The size of molecules which can pass through the plasma
membrane is

a)
b)
c)
d)

52) The plasma membrane is made up of
a) lipids and proteins
b) lipids, proteins and carbohydrates
c) nucleoproteins
d) mucopolysaccharides

53) An enzyme that facilitates transport through the cell membrane
is called a

a) Ligase
b) Permease
c) Endonuclease
d) Lipase

54) The main function of the cell membrane is to
a) regulate the flow of material into and outside the cell
b) maintain the cell shape and size
c) control of all cellular activities
d) store cell material

55) The cell membrane is
a) permeable
b) impermeable
c) selectively permeable
d) semi permeable

56) The thickness of the plasma membrane (unit membrane) is about
a)
b)
c)
d)

57) The active transport mechanism is against the concentration
gradient and

a) requires ATP
b) does not require ATP
c) require protein
d) does not require protein

58) A prokaryotic cell does not possess a
a) nuclear membrane
b) plasma membrane
c) cell wall
d) both (a) and (b)

59) The plasma membrane of an animal cell is composed of
a) Glycoproteins, lipids and disaccharides
b) Lipids, proteins and oligosaccharides
c) Proteins, lipids and polysaccharides
d) Lipids, proteins and monosaccharides

60) The chemical present in the cell wall is
a) Pectin
b) Lignin
c) Cellulose
d) All the above

61) All plant cells possess a
a) Middle lamella
b) Primary wall
c) Lysosomes
d) Centrioles

62) The middle lamella occurs
a) Inner to the primary wall
b) Inner to the secondary wall
c) Outer to the secondary wall
d) Outer to the primary wall

63) The middle lamella contains
a) Cellulose
b) Pectin
c) Lignin
d) Cutin

64) The hydrophilic chemical of the cell wall is
a) Pectin
b) Suberin
c) Fat
d) Lignin

65) The structural element of the cell wall is
a) Matrix
b) Microfibrils
c) Microtubules
d) Arabinogalactans

66) The different layers of the cell wall are
a) Middle lamella and primary wall
b) Primary wall and secondary wall
c) Middle lamella, primary wall and secondary wall
d) Inner, middle and outer layers

67) The innermost wall layer of the cell is the
a) Tertiary wall, if present
b) Secondary wall
c) Primary wall
d) Middle lamella, if present

68) The primary wall grows by
a) Accretion
b) Introgression
c) Intussusception
d) All the above

69) The secondary wall is commonly formed of
a) A single layer
b) Many layers
c) Two layers
d) Three layers

70) The load bearing part of the plant cell is the
a) Middle lamella
b) Secondary wall
c) Primary wall
d) Tertiary wall

71) The primary wall has a thickness of
a)
b)
c)
d)

72) The primary wall is generally elastic due to the absence of
a) Lignin
b) Suberin
c) Cutin
d) Silica

73) The structural material of the fungal cell wall is
a) Pectin
b) Cellulose
c) Peptidoglycan
d) Chitin

74) Ripe fruits soften due to the
a) Degeneration of cell walls
b) Partial solubilisation of pectic compounds
c) Metabolism of tannins
d) Exosmosis

75) The hardness of woody tissue is due to
a) Silica
b) Lignin
c) Cellulose
d) Suberin

76) The impermeability of cork is related to
a) Silica
b) Lignin
c) Cellulose
d) Suberin

77) Cutin occurs in the
a) Pholem tissue
b) Xylem tissue
c) Endodermis
d) Epidermis

78) In the primary wall, cellulose microfibrils are
a) Small, loose and wavy
b) Long, loose and wavy
c) Small, compact and straight
d) Long, compact and straight

79) Cellulose content is high in the
a) Primary wall
b) Secondary wall
c) Tertiary wall
d) Middle lamella

80) Plasmodesmata were named by
a) Hanstein
b) Kolliker
c) Strasburger
d) Garnier

81) An uncutinised and non-suberised cell wall is
a) Semipermeable
b) Permeable
c) Impermeable
d) Selectively permeable

82) Adjacent tracheids and vessels can transfer sap through thin areas in their walls called
a) Plasmodesmata
b) Gap junctions
c) Tight junctions
d) Pits

83) The pit membrane consists of a
a) Primary wall
b) Middle lamella
c) Middle lamella + Primary wall
d) Primary wall + Middle lamella + Primary wall

84) A disc-shaped thickening present on the pit membrane is the
a) Torus
b) Callus
c) Tylosis
d) Stoma

85) The term protoplasm was coined by
a) Huxley
b) Purkinje
c) Dujardin
d) Schultze

86) A unit of protoplasm having a nucleus and covered by a plasmalemma is called a
a) Ectoplast
b) Cell
c) Cytoplast
d) All the above

87) Protoplasm is
a) Alveolar
b) Granular
c) Fibrillar
d) Crystallo-colloidal

88) Protoplast is
a) Granular protoplasm
b) the whole protoplasm of an organism
c) a unit of protoplasm contained in a cell
d) All the above

89) The protoplast excluding the nucleus is called the
a) Cytoplasm
b) Endoplasm
c) Ectoplasm
d) Protoplasm

90) The cell structure between the plasmalemma and the karyotheca is the
a) Vacuole
b) Nucleoplasm
c) Endoplasm
d) Cytoplasm

91) Which part of the protoplast shows streaming or cyclosis?
a) Ectoplast
b) Endoplast
c) Endoplasmic matrix
d) Nucleoplasm

92) Cytoplasmic streaming or cyclosis is absent in
a) Plant cells
b) Animal cells
c) Protozoan protists
d) Procaryotes

93) Cyclosis is caused by the activity of
a) Microtubules
b) Microfilaments
c) Intermediate filaments
d) All the above

94) E.R. is absent in
a) Animal cells
b) Procaryotes
c) Plant cells
d) Protista and Fungi

95) Eucaryotic cells devoid of E.R. are
a) Liver cells
b) Kidney cells
c) Mature leucocytes
d) Mature erythrocytes

96) Eucaryotic cells which contain very little of E.R. are
a) Early embryonic cells
b) Ova
c) Resting cells
d) All the above

97) E.R. is made up of
a) Cisternae
b) Tubules
c) Vesicles
d) All the above

98) Rough endoplasmic reticulum is the type that is
a) Abundant in tubules
b) Associated with ribosomes
c) Associated with lysosomes
d) Both B and C

99) What is more abundant in S.E.R.?
a) Cisternae and vesicles
b) Cisternae and tubules
c) Tubules and vesicles
d) Cisternae

100) What is more abundant in R.E.R.?
a) Cisternae
b) Vesicles
c) Tubules
d) Both A and B

Answers

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