Cell & Cell Division Part VIII

1) Crossing over is
a) Expression of recessive gene
b) Synapsis of homologous chromosomes
c) Linkage between dominant genes
d) Recombination between linked genes

2) In the leaf of a flowering plant having 22 pairs of chromosomes, the chromosome number
in the gametes will be

a) 11 in gametes
b) 22 in gametes
c) 44 in embryo
d) 44 in stem cell

3) For the formation of 160 pollen grains, how many meiotic divisions are required?
a) 20
b) 30
c) 40
d) 80

4) In a cell that is not dividing the chromosomes are visible as a tangle of
fine threads called

a) Microtubules
b) Chromatin
c) Microfilaments
d) Nucleotin

5) In Neurospora 8 ascospores are formed: they are 2a, 4A, 2a. It shows
a) First generation division
b) Second generation division
c) No crossing over
d) Some meiosis occurs

6) The number of chromatids in a chromosome at metaphase is
a) 2 in mitosis and 1 in meiosis
b) 1 in mitosis and 2 in meiosis
c) 2 each in mitosis and meiosis
d) 2 in mitosis and 4 in meiosis

7) In which stage of the cell cycle does formation of RNA and protein synthesis occur?
a) S-phase
b) M-phase
d) Cytokinesis

8) How many megaspore mother cells are required to produce 100 eggs during

a) 1
b) 100
c) 50
d) 25

9) In Neurospora crassa 8 ascospores are formed instead of 4, this is by
a) One meiosis
b) Two meioses
c) Two mitoses
d) Meiosis followed by mitosis

11) Which one of the following is the best stage to study the shape, size and
number of chromosomes?

a) Interphase
b) Telophase
c) Prophase
d) Metaphase

12) The centromere is required for the
a) Poleward movement of chromosomes
b) Cytoplasmic cleavage
c) Replication of DNA
d) Chromosome segregation

13) The four daughter cells derived from a single meiosis differ from each other
due to

a) Difference in chromosome number
b) Crossing over only
c) Independent assortment of chromosomes only
d) Crossing over as well as independent assortment of chromosomes

14) In mitosis the duplication of chromosomes occurs during
a) Early Prophase
b) Late Prophase
c) Interphase
d) Late Telophase

15) During the first metaphase of meiosis the centromeres
a) Undergo division
b) Do not divide
c) Divide but do not separate
d) Are not identical

16) Karyokinesis differs from cytokinesis because it involves
a) Division of cytoplasm
b) Division of the nucleus and cytoplasm
c) Division of the nucleus
d) Division of the cell

17) The replication of centrioles occurs during
a) Early prophase
b) Late prophase
c) Late telophase
d) Interphase

18) A child is born with an extra chromosome in each of its cells. This condition
is usually the result of

a) Segregation
b) Hybridization
c) Non disjunction
d) Crossing over

19) Lampbrush chromosomes occur at
a) Diplotene of meiosis
b) Prophase of meiosis
c) Interphase
d) Metaphase of meiosis

20) How many pollen grains can be formed after meiotic division in 10 microspore
mother cells?

a) 80
b) 40
c) 20
d) 10

21) The chromosomes are arranged in the equatorial plane during
a) Prophase
b) Metaphase
c) Anaphase
d) Telophase

22) The number of mitotic divisions required for 64 cells to be produced is
a) 32
b) 4
c) 6
d) 16

23) When, during the meiotic division, do the centromeres divide?
a) Diplotene
b) Metaphase I
c) Pachytene
d) Anaphase II

24) Which one of the following structures will not be common to mitotic cells
of higher plants?

a) Centromere
b) Centriole
c) Cell plate
d) Spindle fibres

25) In a sexually reproducing plant the two chromosomes of a homologous pair are
contributed by

a) Female parent only
b) Male parent only
c) Both the female and the male parent
d) Either of the parents

26) The complete process of meiosis involves
a) One cytoplasmic division with one duplication of the chromosomes
b) Two cytoplasmic divisions with one duplication of the chromosomes
c) Two cytoplasmic divisions with two duplications of the chromosomes
d) One cytoplasmic division with two duplications of the chromosomes

27) The formation of multivalents at meiosis in a diploid organism is due to
a) Reciprocal translocation
b) Inversion
c) Deletion
d) Monosomy

28) Colchicine arrests which stage of mitosis?
a) Anaphase
b) Metaphase
c) Prophase
d) Interphase

29) In the laboratory, the process of mitosis can be best demostrated in
a) Onion root tips
b) Garlic shoot tip
c) Citrus leaf
d) Tomato anthers

30) The significance of meiosis lies in
a) Maintaining constancy in the number of chromosomes in an organism
b) Production of genetic variability in the population of a species
c) Reduction of the diploid number of chromosomes to haploid
d) All of the above

31) The number of chromosome groups at the equatorial plate in metaphase I of
meiosis in a plant with 2n = 50, will be

a) 25
b) 30
c) 50
d) 75

32) The sequence of various periods in the cell cycle is

33) The important part of a glycoprotein is the
a) Protein
b) Carbohydrate
c) Both (a) and (b)
d) None of these

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

35) Photosystem-II (PS-II) is related to the
a) Grana
b) Intergrana
c) Stroma
d) Outer membrane of the chloroplast

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

37) The higher resolution in an electron microscope is due to the
a) low wavelength of ultraviolet radiations as a light source
b) High numerical aperture of the glass lens system
c) Powerful electromagnetic lenses
d) Very low wavelength (0.005 nm) of the electron beam used as light source

38) The technique by which subcellular components are separated on the basis of their physical properties is
a) Electrophoresis
b) Cell fractionation
c) Autoradiography
d) Chromatography

39) The resolving power of a microscope means the capacity to
a) Magnify the image
b) Distinguish between Organelles
c) Distinguish between two objects
d) Distinguish between two close points

40) To determine the ultrastructure of a cell organelle, the most likely method to be used would be
a) Autoradiography
b) Microdissection
c) Phase contrast microscopy
d) Electron microscopy

41) The electron microscope has revealed the presence of
a) Chloroplast
b) Leucoplast
c) Ribosomes
d) Chromosomes

42) The figures of cork cells as seen by Robert Hooke were published in his book
a) Micrographia
b) Origin of Species
c) Plant Kingdom
d) Genera Plantarum

43) The nucleus was first discovered by
a) Robert Koch
b) Robert Brown
c) Leeuwenhoek
d) Scheann

44) The smallest measuring unit in cytology is the
a) Micron
b) nm
c) Electron
d) Angstrom

45) What Robert Hooke described in the thin section of cork as a cell was really the
a) Cellulose
b) Nuclei
c) Protoplasm
d) Cell wall

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

47) Mitochondria are the storehouses of
a) Fats
b) ATP
c) Glucose
d) Glycogen

48) When does synapsis occur in meiosis?
a) Zygotene
b) Leptoene
c) Diplotene
d) Pachytene

49) The cell theory was propounded by
a) Mendel
b) Schleiden and Schwann
c) De Breze
d) Darwin

50) Cytokinesis refers to the
a) Division of chromosomes
b) Division of cytoplasm
c) None of these
d) Division of the nucleus

51) Polytene or giant chromosomes are found in the
a) Salivary glands of man
b) Salivary glands of women
c) Salivary glands of all animals
d) Salivary glands of Drosophila

52) The polytene chromosomes were discovered for the first time in
a) House Fly
b) Drosophila
c) Fruit Fly
d) Chironomus Larva

53) Peptide bonds are involved in linking
a) Nucleic acids
b) Amino acids
c) Keto acids
d) Fatty acids

54) Radi Tracer technique shows that DNA is a
a) Multi-helix
b) Double-helix
c) Single-helix
d) None of these

55) Which are the most diverse molecules of the cell?
a) Carbohydates
b) Proteins
c) Lipids
d) Mineral salts

56) The maximum energy is produced by oxidation of
a) Carbohydates
b) Minerals
c) Proteins
d) Fats

57) DNA is a polymer of
a) Deoxyribonucleotides
b) Deoxyribonucleosides
c) Ribonucleosides
d) Ribonucleotides

58) What is true about enzymes?
a) All proteins are enzymes
b) All enzymes are proteins
c) All enzymes are not proteins
d) All enzymes are vitamins

59) ‘One gene-one enzyme’ concept was given by
a) Jacob and Monod
b) Griffith
c) Beadle and Tatum
d) Watson and Crick

60) The ‘lock and key model’ of enzyme action was given by
a) Emil Fischer
b) Koshland
c) Buchner
d) Kuhne

61) In the fluid mosaic model of the cell membrane there is a lipid bilayer with
a) Proteins on both surfaces
b) Proteins on the outer face only
c) only embedded proteins
d) Some proteins embedded and some on the surface

62) The latest model of biomembrane structure is the
a) Fluid mosaic model
b) Unit membrane model
c) Artificial model system
d) Thin lipid model

63) The inner membrane of the mitochodrion is usually highly convoluted forming a series of infoldings known as
a) Grana
b) Lamellae
c) Thylakoids
d) Cristae

64) Besides giving off secretory vesicles the Golgi apparatus is also concerned with the formation of
a) Lysosomes
b) Plastids
c) Grana of chloroplasts
d) Cell plates after cell division in plants

65) Desmosomes are concerned with
a) Cell adherence
b) Cell division
c) Cellular excretion
d) Cytolysis

66) The point at which the polytene chromosomes appear to be attached together is known as the
a) Centromere
b) Centriole
c) Chromomere
d) Chromocentre

67) The BMR (Basal Metabolic Rate) is controlled by
a) Thyroxine
b) Adrenaline
c) GH (Growth Hormone)
d) Insulin

68) Kreb’s cycle takes place in the
a) Mitochondria
b) Lysosomes
c) Golgi bodies
d) Plastids

69) The term ‘Meiosis’ was coined by
a) Knoll and Ruska
b) Farmer and Moore
c) Beadle and Tatum
d) A. Fleming

70) Pairing of homologous chromosomes occurs during
a) Leptotene
b) Zygotene
c) Pachytene
d) Diplotene

71) Chromosomes can be counted best at the stage of
a) Prophase
b) Anaphase
c) Metaphase
d) Telophase

72) The term chromosome was introduced by
a) Schimper
b) Waldeyer
c) Benda
d) Altmann

73) The plant cell wall mainly consists of
a) Cellulose
b) Protein
c) Starch
d) Pectin

74) Proteins essentially contain
a) Nitrogen, hydrogen, oxygen and sulphur
b) Carbon, nitrogen, hydrogen and sulphur
c) Carbon, nitrogen, hydrogen and oxygen
d) Carbon, nitrogen, oxygen and sulphur

75) In plants, enzymes occur in
a) Leaves only
b) Flowers only
c) All living cells
d) Storage organs only

76) Enzymes that function within the cells in which they were produced are called
a) Endoenzymes
b) Exoenzymes
c) Apoenzymes
d) Isoenzymes

77) Enzymes exist in the cell as
a) Colloids
b) Solutions
c) Solids
d) Crystals

78) The combination of apoenzyme and co-enzyme produces a
a) Prosthetic goup
b) Holoenzyme
c) Enzyme product complex
d) Enzyme-substrate complex

79) The enzyme which combines with a non-protein part to form a functional enzyme is a/an
a) Holoenzyme
b) Prosthetic group
c) Apoenzyme
d) none of these

80) One gene, one enzyme concept means
a) One gene controls one enzyme
b) Enzymes control gene
c) All enzymes are controlled by genes
d) All genes are controlled by enzymes

81) The maximum number of enzymes are found in
a) Herbivores
b) Carnivores
c) Omnivores
d) None of these

82) Hydrolytic enzymes are found in
a) Mitochondria
b) Lysosomes
c) Ribosomes
d) Peroxisomes

83) The electron transport chain is located in the
a) Inner membrane of the mitochondria
b) Outer membrane of the mitochondria
c) Intermembrane space of the mitochondria
d) Matrix of the mitochondria

84) The site for protein synthesis in a cell is the
a) Mitochondria
b) Chromosome
c) Ribosome
d) Centrosome

85) The controlling centre of the cell is the
a) Ribosome
b) Nucleus
c) Nucleolus
d) Mitochondria

86) In anaerobic respiration, pyruvic acid in muscle forms
a) Alcohol
b) Acetyl Co-A
c) Lactic Acid
d) Acetaldehyde

87) The form of energy used in respiration is
a) Chemical
b) Electrical
c) Radiant
d) Mechanical

88) Meiosis is best shown in the
a) Anther wall
b) Pollen grain
c) Gamete
d) Microsporangium

89) The poleward movement of dyads occurs during
a) Anaphase
b) Anaphase I
c) Anaphase II
d) Telophase

90) The common immediate source of energy in cellular activity is
a) ADP
b) ATP
c) FAD
d) NAD

91) An enzyme that joins the ends of two strands of nucleic acid is
a) Polymerase
b) Ligase
c) Synthetase
d) Helicase

92) A chemotherapeutic substance derived from living organisms that has an inhibitory effect on disease producing bacteria is known as a
a) Bactericide
b) Antibody
c) Antibiotic
d) Exotoxin

93) The cell wall in Gram positive bacteria is composed of
a) Lipid and protein
b) Murein
c) Proteins only
d) Cellulose and pectin

94) Gametes produced after reduction division are termed
a) Meiogametes
b) Mitogametes
c) Coenogametes
d) None of these

95) Meiosis takes place in the zygote of
a) Funaria
b) Dryopteris
c) Chlamydomonas
d) Puccinia

96) Who discovered enzymes or coined the term enzyme for the substance catalysing alcoholic fermentation in yeast?
a) Pasteur
b) Buchner
c) Kuhne
d) Sumner

97) Enzymes are basically
a) Vitamins
b) Fats
c) Proteins
d) Carbon

98) Albinism is a congenital disorder resulting from the lack of the enzyme
a) Catalase
b) Fructokinase
c) Tyrosinase
d) Xanthine oxidise

99) Enzymes which are slightly different in molecular structure but can perform identical activity are called
a) Isoenzymes
b) Holoenzymes
c) Apoenzymes
d) Coenzymes

100) An enzyme that joins the ends of two strands of nucleic acid is
a) Polymerase
b) Ligase
c) Synthetase
d) Helicase


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