Reproduction Growth & Development MCQs Part I

1) ” Plants bend towards light because they need light for growth”.
This statement is based on

a) Telepathy
b) Serendipity
c) Teleology
d) None of these

2) Embryology is the study of
a) Formation of gametes and their fusion
b) The division of the zygote
c) Early development
d) All of the above

3) The branch of biology which deals with the biological clocks in plant
and animals is called

a) Ethology
b) Bionics
c) Exobiology
d) Chronobiology

4) The act of collection or getting together to form a whole in a living system is called
a) Equilibrium
b) Aggregation
c) Interaction
d) Entropy

5) Regulation of organisation occurs through
a) Flow of information
b) Aggregation and interaction
c) Entropy and flow of energy
d) Aggregation, interaction, equilibrium and change

6) Arrangement and coordination of smaller components into larger ones is
a) Aggregation
b) Interaction
c) Organization
d) Coordination

7) The sum total of building up reactions which involve an orderly synthesis of complex substances from simpler ones is called
a) Metabolism
b) Catabolism
c) Anabolism
d) Biocatalysis

8) Which of the following biochemical reactions is a catabolic reaction?

9) The resurrection plant is
a) Ophrys muscifera
b) Pinus roxburghi
c) Selaginella lepidophylla
d) Sequoia

10) Substances which originate at the tip of stem and root and control the growth of distinct organs are
a) Enzymes
b) Hormones
c) Vitamins
d) Food substances

11) Plant hormones are
a) Proteins
b) Lipids
c) Carbohydrates
d) Aromatic compounds

12) Which of the following substance acts as a key growth regulator ?
a) ATP and food
b) Hormones
c) Enzymes
d) Auxins and vitamins

13) Which of the following hormones is translocated to other parts of the plants and exhibits a polar movement ?
a) Auxin
c) Zeatin
d) ABA

14) Substances which are synthesized at the top of the stem and control the growth of other parts of the plant body are
a) Food materials
b) Auxins or hormones
c) Vitamins
d) Enzymes

15) Auxin was first of all chemically characterized by
a) Julius Sachs
b) F.W. Went
c) Charles Darwin
d) Thimann and Skoog

16) I.A.A stands for
a) Indole-3 acetic anhydride
b) Indole-3 acetic acid
c) Indole-3 acetic acetate
d) Indole-3 acetoacetic acid

17) Avena coleoptile test is used to detect the presence of
a) IAA
b) GA
c) NAA
d) BA

18) One of the following is a precursor of auxin:
a) Phenylalanine
b) Methionine
c) Tryptophan
d) Cystosine

19) Which of the following effects of hormones in plants is the basis for their commercial application ?
a) Callus formation
b) Fruit ripening
c) Induction of root formation in stem cuttings
d) All the above

20) Auxins promote growth
a) Rarely
b) Always
c) Mostly
d) Never

21) The plant hormone which is translocated to other parts for growth of the plant is known as
a) Gibberellin
b) Cytokinin
c) Indole acetic acid
d) None of the above

22) In unisexual plants the sex can be changed by application of
a) Auxins
b) ABA
c) Ethanol
d) Cytokinins

23) Auxins in small amounts inhibit the growth of
a) Roots
b) Flowers
c) Stems
d) Leaves

24) A high concentration of synthetic auxins is generally used for
a) Weed control
b) Enhancing root initiation
c) Controlling of cell enlargement
d) Preventing the growth of the lateral buds

25) Auxin does not
a) Increase the uptake of water by cells
b) Increase the rate of respiration
c) Increase the plasticity of cell walls
d) Increase the rate of photosynthesis

26) Which one of the following plant functions is not controlled by auxin ?
a) Apical dominance
b) Phototropism
c) Photosynthesis
d) Growth

27) Apical dominance in higher plants is due to
a) Enzyme activity
b) Photoperiodism
c) Carbohydrate metabolism
d) Balance between auxin and cytokinin

28) What happens when auxin is applied to the tip of a cut stump ?
a) Tip is burnt
b) Flower is burnt
c) A leaf is instantly developedv
d) Callus is formed

29) Which of the following accelerates apical meristem growth and exerts a direct effect on the growth of the plant axis in length ?
a) Cytokinin
b) Ethylene
c) Gibberellin
d) Auxin

30) The formation of auxin is checked by
a) Photosynthesis
b) Photo-oxidation
c) Phototropism
d) Darkness

31) The rooting hormone is
a) Auxin
b) Gibberellin
c) Cytokinin
d) Synthetic auxin and IAA

32) Substances which originate at the tip of the plant stem and control growth elsewhere are
a) Food material
b) Auxins or hormones
c) Vitamins
d) Enzymes

33) A substance which accelerates growth in the stem is an
a) Etiolin
b) Auxin
c) Vitamin
d) Enzyme

34) Storage sprouting of potato tubers can be prevented by treatment with low concentrations of
a) Nicotinamide
b) Naphthalene acetic acid
c) Nitorogenous fertilizer
d) Natural sunlight

35) A high concentration of synthetic auxin, 2, 4-D is used as a
a) Vitamin
b) Fertilizer
c) Insecticide
d) Weedicide

36) A high or supra-optimal concentration of auxin/synthetic hormone causes
a) Rooting and flowering
b) Cell enlargement and chlorosis
c) Stunting of plant growth and weed control
d) Increase in growth of root and shoot apex

37) 2, 4-D is a synthetic
a) Auxin
b) Gibberellin
c) Cytokinin
d) Florigen

38) The bouncy nature of a plant is maintained by drastic pruning which causes the deficiency of
a) Auxins
b) Gibberellins
c) Cytokinins
d) Minerals

39) A bioassay for auxin is
a) Avena curvature test
b) Green leaf test
c) Dwarf maize test
d) Cell division test

40) Which of the following is not true about auxins ?
a) It inhibits lateral growth
b) It promotes stem elongation
c) It promotes cell division
d) It helps in absorption of water

41) Indole – 3 – acetic acid,called auxin, was first isolated from
a) Human urine
b) Corn germ oil
c) Fusarium
d) Rhizopus

42) The biological activity of IAA is tested by
a) Amylase test
b) Avena curvature test
c) Soybean callus test
d) Xanthium leaf disc test

43) Auxin inhibits the growth of
a) Apical buds
b) Lateral axillary buds
c) Roots on stem cuttings
d) Parthenocarpic development of fruits

44) The Avena coleoptile test to find out the amount of growth promoting hormones was discovered by
a) F.W. Went
b) L.J.Oudus
c) K.V.Thimann
d) F. Skoog

45) Which of the following is responsible for apical dominance ?
b) IAA
c) ABA
d) Florigen

46) A higher concentration of auxin is present in the
a) Root apex
b) Stem apex
c) Internodes
d) Petiole and leaves

47) In tissue culture, the differentiation of root and shoot can be controlled by
a) Change in light intensity
b) Giving temperature shocks
c) Using tissue of right size
d) Modifying auxin and cytokinin ratios in the medium

48) Gibberellin was isolated from
a) An algae
b) A fungus
c) A bacterium
d) A virus

49) Gibberellin was first extracted from
a) Gelidium
b) Aspergillus
c) Gibberella fujikuroi
d) Gracelaria

50) Gibberellic acid has been successfully employed to induce flowering
a) In long day plants under short day conditions
b) In short day plants under long day conditions
c) For some plants
d) None of the above

51) The exogenous application of gibberellins induces male flower formation on genetically female plants in
a) Cucumis
b) Curcuma
c) Carica
d) Coccinia

52) Gibberellins cause
a) Curvature of coleoptile
b) Elongation of internodes
c) Initiation of lateral roots
d) Cell division

53) GA was discovered by
a) Yabuta and Sumuki
b) Utrochet and Dolk
c) Donoho and Walker
d) Hoshimata and Rappaport

54) Which hormone was discovered from a fungus?
a) Kinetin
b) Auxin
c) Gibberellin
d) Abscissin

55) If a bacterial cell divides once every 20 minutes, how many bacteria will
be formed in two hours?

a) 4
b) 8
c) 16
d) 64

56) Which is mismatched?
a) AIDS – Giardia lamblia
b) Trypanosome – African sleeping sickness
c) Plasmodium vivax – malaria
d) Amoeboid – severe diarrhea

57) “Red tides” are produced by
a) Gonyaulax
b) Chlamydomonas
c) Chlorella
d) Ceratium

58) In Paramecium, the essential carriers of genetic information are
a) Both macro and micronuclei
b) Micronucleus
c) Mitochondria
d) Macronucleus

59) The nucleus in dinoflagellates is called
a) Isokaryon
b) Mesokaryon
c) Homokaryon
d) Heterokaryon

60) Diatomaceous earth is used to insulate boilers and steam pipes because
a) The diatomaceous earth is very cheap
b) It is a good conductor of heat
c) It is a bad conductor of heat
d) It is composed of calcium carbonate

61) Dikaryotic cells are formed in
a) Phycomycetes
b) Ascomycetes
c) Basidiomycetes
d) In both (2) and (3)

62) A fungus which requires only one host to complete its life cycle is called
a) Heterothallic
b) Heterosporous
c) Autoecious
d) Heteroecious

63) All heterotrophs require an environment which can provide
a) Organic compounds
b) Vitamin A
c) Ammonium salt
d) Nitrates in solution

64) The process in which vegetative cells fuse together is called as
a) Plasmogamy
b) Somatogamy
c) Spermatisation
d) Parthenogenesis

65) When the entire fungus is used in the formation of a reproductive structure, the organism is called
a) Acarpic
b) Holocarpic
c) Eucarpic
d) None of these

66) When a portion of the fungal mycelium is used in the formation of the reproductive structure, the organism is called
a) Eucarpic
b) Acarpic
c) Holocarpic
d) None of these

67) Fungal hyphae arranged in a parallel manner constitute the
a) Trama
b) Hymenium
c) Fruiting body
d) Fructification

68) Fungi which grow inside the host tissues are called
a) Lithophyte
b) Epiphyte
c) Endophyte
d) Ectophyte

69) A thick strand of underground hyphae resembling a root is called
a) Rhizoid
b) Rhizophore
c) Rhizomorph
d) Radicle

70) A biennial plant is that which
a) Flowers every two years
b) Flowers every year and completes its life cycle in two years
c) Completes its life cycle in two years
d) Completes its life cycle twice in a single year

71) Annuals and biennials are typically
a) Polycarpic
b) Bicarpic
c) Monocarpic
d) Monocarpic and bicarpic respectively

72) A polycarpic plant is
a) Annual
b) Biennial
c) Perennial
d) None

73) Angiosperms differ from gymnosperms in having
a) Broad leaves
b) Tracheids
c) Fruits
d) Cotyledons

74) If a seed is defined as an ovule modified as a result of fertilization, one may expect to find seeds in
a) Gymnosperms only
b) Angiosperms only
c) All vascular plants
d) Phanerogams

75) A seed is defined as
a) A mature dormant integumented megasporangium
b) An immature integumented ovary
c) An immature integumented ovule
d) A mature integumented spore

76) Hypogeal germination is found in
a) Cucurbita
b) Maize
c) Rhizophora
d) Bean

77) Epigeal germination is found in
a) Maize
b) Wheat
c) Pea
d) Castor

78) Which one is a non-endospermic seed?
a) Maize
b) Pea
c) Wheat
d) Rice

79) In which of the following is the seed without differentiation of cotyledons?
a) Cuscuta
b) Iberis
c) Walnut
d) Black pepper

80) In seeds, food is stored either in endosperm or in the
a) Hypocotyl
b) Pericarp
c) Cotyledons
d) Epicotyl

81) Which of the following is the chief function of cotyledons in a seed?
a) To help during germination of seed
b) To supply food to the young embryo
c) To store food substances
d) To give protection to the radicle and plumule

82) A partial parasite is one which
a) Takes only water from host
b) Takes both water and minerals from host but manufactures its own food
c) Draws food from host only at times
d) Uses the host just as support

83) Which of the following phenomena is exhibited by Loranthus?
a) Parasitism
b) Symbiosis
c) Commensalism
d) None of these

84) Plants manufacturing their own food are called
a) Epiphytes
b) Parasites
c) Saprophytes
d) Autotrophic

85) Which of the following features would distinguish a monocot from a dicot

a) Aestivation
b) Vernation
c) Phyllotaxy
d) Venation

86) Plants which obtain their food from living organsims by haustoria

a) Saprophytes
b) Parasites
c) Symbionts
d) Hydrophytes

87) Balanophora species are
a) Partial stem parasites
b) Total stem parasites
c) Total root parasites
d) Partial root parasites

88) The plant whose seeds are known to have the longest viability period is
a) Zizyphus jujuba (ber)
b) Carica papaya (papaya)
c) Nelumbo nucifera (lotus)
d) Triticum vulgara (wheat)

89) In which of the following plants do cotyledons form the first pair of leaves?
a) Rice
b) Wheat
c) Castor
d) Maize

90) If soaked pea seeds are kept in three separate flasks, they will germinate
best in the flask containing

a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Water

91) Most of our trees grow faster in the
a) Autumn
b) Summer
c) Winter
d) Spring

92) The single cotyledon of a monocot is the
a) Plumule
b) Mesocotyl
c) Coleorrhiza
d) Scutellum

93) The dispersal of seeds by the mechanical explosion of fruits is common among
a) Paddy and cucurbits
b) Grasses and chillies
c) Legumes
d) Sunflower family

94) In which of the following does the seed show no differentiation of cotyledons?
a) Cuscuta
b) Iberis
c) Walnut
d) Black pepper

95) Which of the following does not possess winged seeds nor exhibit wind dispersal?
a) Acer
b) Hiptage
c) Shorea
d) Moringa

96) Seedless fruits can be obtained by the treatment of flowers with
a) Enzymes
b) Hormones
c) 70 degrees temperature
d) Bright light

97) Caryopsis fruits are found in
a) Tomato
b) Maize (or Gramineae)
c) Brinjal
d) Coconut

98) Seeds of gram are
a) Exalbuminous epigeal
b) Exalbuminous hypogeal
c) Albuminous and epigeal
d) Albuminous and hypogeal

99) The caryopsis of maize can be described as
a) Exalbuminous and epigeal
b) Exalbuminous and hypogeal
c) Albuminous and epigeal
d) Albuminous and hypogeal

100) Seeds swell when placed in water due to (or) Seeds absorb water during germination by
a) Diffusion
b) Absorption
c) Imbibition
d) Osmosis


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