Biology MCQ
#7 Biology Class 12 Chapter 7 - Plant Growth and Mineral Nutrition MHTCET / NEET MCQ
7 Plant Growth and Mineral Nutrition
(1) Which of the hormone can replace vernalization ?
(a) Auxin(b) Cytokinin(c) Gibberellins(d) Ethylene
Answer-
(c) Gibberellins
(2) The principle pathway of water translocation in angiosperms is ……… .
(a) Sieve cells(b) Sieve tube elements(c) Xylem(d) Xylem and phloem
Answer-
(c) Xylem
(3) Abscissic acid controls ……… .
(a) cell division(b) leaf fall and dormancy(c) shoot elongation(d) cell elongation and wall formation
Answer-
(b) leaf fall and dormancy
(4) Which is employed for artificial ripening of banana fruits ?
(a) Auxin(b) Ethylene(c) Cytokinin(d) Gibberellin
Answer-
(b) Ethylene
(5) Which of the following is required for stimulation of flowering in plants ?
(a) Adequate oxygen(b) Definite photoperiod(c) Adequate water(d) W ater and minerals
Answer-
(b) Definite photoperiod
(6) For short day plants, the critical period is ……… .
(a) light(b) dark/night(c) U V rays(d) Both (a) and (c)
Answer-
(b) dark/night
(7) Which of the following is NOT day neutral plant ?
(a) Tomato(b) Cotton(c) Sunflower(d) Soybean
Answer-
(d) Soybean
(8) Essential macro elements are ……… .
(a) manufactured during photosynthesis(b) produced by enzymes(c) obtained from soil(d) produced by growth hormones
Answer-
(c) obtained from soil
(9) Function of Zinc is ……… .
(a) closing of stomata(b) biosynthesis of 3-IAA(c) synthesis of chlorophyll(d) oxidation of carbohydrates
Answer-
(b) biosynthesis of 3-IAA
(10) Necrosis means ……… .
(a) yellow spot on the leaves(b) death of tissue(c) darkening of green colour in leaves(d) wilting of leaves
Answer-
(b) death of tissue
(11) Conversion of nitrates to nitrogen is called ……… .
(a) ammonification(b) nitrification(c) nitrogen fixation(d) denitrification
Answer-
(d) denitrification
(12) How many molecules of ATP are required to fix one molecule of nitrogen ?
(a) 12(b) 20(c) 6(d) 16
Answer-
(d) 16
(13) For the following, which is the aspect of growth ? Example – Increase in length, size and number of cells.
(a) Quantitative(b) Qualitative(c) Both (a) and (b)(d) Three dimensional
Answer-
(a) Quantitative
(14) In vascular plants, growth takes place due to ……… .
(a) conducting tissues(b) embryo(c) meristems(d) stem cell
Answer-
(c) meristems
(15) What is growth ?
(a) Temporary, irreversible increase in an organism.(b) Permanent, reversible increase in an organism.(c) Permanent, irreversible decrease in an organism.(d) Permanent, irreversible increase in an organism.
Answer-
(d) Permanent, irreversible, increase in an organism
(16) Based on location, plants have these three types of meristems.
(a) Basal, Intercalary and Lateral(b) Apical, Basal and Lateral(c) Apical, Interfascicular and Lateral(d) Apical, Intercalary, Lateral
Answer-
(d) Apical, Intercalary, Lateral
(17) Meristem cells are ……… .
(a) thin walled, vacuolated with prominent nucleus(b) thick walled, non-vacuolated without nucleus(c) thin walled, non-vacuolated with prominent nucleus(d) thick walled, vacuolated with prominent nucleus
Answer-
(c) thin walled, non-vacuolated with prominent nucleus
(18) Select correct sequence of phases of growth.
(a) Phase of formation, phase of elongation, phase of maturation(b) Phase of cell division, phase of enlargement, phase of elongation(c) Phase of formation, phase of maturation, phase of elongation(d) Phase of enlargement, phase of cell division, phase of maturation
Answer-
(a) Phase of formation, phase of elongation, phase of maturation
(19) In which phase of growth, growth rate is at accelerated pace ?
(a) Lag phase(b) Log phase(c) Steady phase(d) Stationary phase
Answer-
(b) Log phase
(20) Water is essential for growth because it is necessary ……… .
(a) for turgidity(b) as nutrient(c) as raw material(d) for gravity
Answer-
(a) for turgidity
(21) Which equipment is suitable for measuring linear growth of shoot ?
(a) Horizontal microscope(b) Spectroscope(c) Crescograph(d) Auxanometer
Answer-
(d) Auxanometer
(22) Which is correct expression of absolute growth rate (AGR) ?
(a) AGR = dn/dt(b) AGR = dt/dn(c) AGR = RGR/n(d) AGR = n/RGR
Answer-
(a) AGR =dn/dt
(23) Arithmetic growth in plants shows ……… graph.
(a) Sigmoid(b) J-shaped(c) linear(d) elliptical
Answer-
(c) linear
(24) What is grand period of growth ?
(a) The total time required for all phases to occur(b) The total time required for exponential phase(c) The total time required for Lag and Log phase together(d) The total time required for stationary phase
Answer-
(a) The total time required for all phases to occur
(25) Which tissue is formed by process of dedifferentiation ?
(a) Intrafascicular cambium(b) Secondary phloem(c) Interfascicular cambium(d) Secondary xylem
Answer-
(c) Interfascicular cambium
(26) The example of environmental plasticityheterophylly observed is
(a) Cotton(b) Coriander(c) Larkspur(d) Buttercup
Answer-
(d) Buttercup
(27) Synthesis of IAA takes place from amino acid ……… .
(a) Methionine(b) Tryptophan(c) Valine(d) Aspartic acid
Answer-
(b) Tryptophan
(28) Find the odd one out.
(a) IAA(b) 2, 4-D(c) NAA(d) IBA
Answer-
(a) IAA
(29) The selective herbicide is ……… .
(a) IBA(b) GA3(c) 2, 4 D(d) NAA
Answer-
(c) 2, 4 D
(30) This hormone promotes rooting in artificial method of cutting ……… .
(a) Gibberellin(b) Auxin(c) Cytokinin(d) Dormin
Answer-
(b) Auxin
(31) Chemically the peculiar structure of gibberellins is ……… ring.
(a) pyrole ring(b) purine ring(c) gibbeane ring(d) pyrimidine
Answer-
(c) gibbeane ring
(32) First natural cytokinin was obtained from ……… by Letham.
(a) Maize grains(b) Coconut milk(c) Rice seedling(d) Tomato
Answer-
(a) Maize grains
(33) A low ratio of cytokinin to auxin induces ……… in plants.
(a) rooting(b) shooting(c) bud formation(d) flowering
Answer-
(a) rooting
(34) Apical dominance : Auxin : : Fruit ripening : ?
(a) Gibberellin(b) Cytokinin(c) Ethylene(d) Abscissic acid
Answer-
(c) Ethylene
(35) Which hormone is known as stress hormone ?
(a) Auxin(b) Gibberellin(c) Ethylene(d) Abscissic acid
Answer-
(d) Abscissic acid
(36) Abscissic acid is synthesised from ……… .
(a) Methionine(b) Malic acid(c) Mevalonic acid(d) Mucin
Answer-
(c) Mevalonic acid
(37) Photoperiodic response is because of pigment …….. .
(a) Cytochrome(b) Phytochrome(c) Anthocyanin(d) Phycobilin
Answer-
(b) Phytochrome
(38) The favourable temperature for vernalization is ……… .
(a) 1 to 6 °C(b) 11 to 16 °C(c) 10 to 16 °C(d) – 1 to 1 °C
Answer-
(a) 1 to 6 °C
(39) Identify the group of non-mineral elements needed by plants.
(a) PO4, CO3, SO4(b) C, H, O(c) N, P, K(d) C, H, N
Answer-
(b) C, H, O
(40) The deficiency symptoms of these minerals are visible in young leaves ……… .
(a) Ca, CO(b) S, P(c) Ca, S(d) Zn, Mg
Answer-
(c) Ca, S
(41) The symptom chlorosis is observed as ……… .
(a) yellowing of leaf(b) premature leaf fall(c) malformation of leaf(d) localized death of tissue
Answer-
(a) yellowing of leaf
(42) ……… is constituent of chlorophyll.
(a) Mn(b) Mg(c) Mo(d) Fe
Answer-
(b) Mg
(43) This is essential for O2 evolution in photosynthesis and for proper solute concentration ………
(a) Ca(b) Cu(c) Cl(d) Co
Answer-
(c) Cl
(44) For active absorption of mineral uptake, energy is supplied by
(a) respiration(b) chemosynthesis(c) photosynthesis(d) transpiration
Answer-
(a) respiration
(45) Cyanobacteria fix nitrogen in specialised cells called ……… .
(a) Velamen(b) Haustoria(c) Heteocysts(d) Hormogonia
Answer-
(c) Heteocysts
(46) In root nodule, symbiotic nitrogen fixer organism is ……… .
(a) Rhizopus(b) Pseudomonas(c) Rhizobium(d) Nitrosomonas
Answer-
(c) Rhizobium
(47) In plant body, amides are transported through ……… .
(a) sieve tubes(b) xylem vessels(c) phloem parenchyma(d) plasmodesmata
Answer-
(b) xylem vessels
(48) Building blocks of proteins are ……… .
(a) amides(b) amino acids(c) carboxylic acid(d) nitrates
Answer-
(b) amino acids
(49) Flowering plants Aster, Dahlia and Chrysanthemum are ……… .
(a) SDP(b) LDP(c) DNP(d) SDP or LDP
Answer-
(a) SDP
(50) Experimental material of Garner and Allard for discovery of photoperiodism was …… .
(a) Cucumber and Tomato(b) Dahlia and Aster(c) Soybean and Tobacco(d) Cabbage and Spinach
Answer-
(c) Soybean and Tobacco
(51) Which of the following is used for the production of long seedless grapes ?
(a) Auxin(b) Cytokinin(c) Ethylene(d) Gibberellin
Answer-
(d) Gibberellin
(52) In vernalization, the cold stimulus is perceived by ………. .
(a) axillary bud(b) floral bud(c) leaves(d) apical bud (shoot apex)
Answer-
(d) apical bud (shoot apex)
(53) Xanthium is ……… .
(a) SDP(b) LDP(c) DNP(d) not a flowering plant
Answer-
(a) SDP
(54) Growth starts slowly during the ………. .
(a) lag phase(b) exponential phase(c) maturation phase(d) stationary phase
Answer-
(a) lag phase
(55) Cytokinins induce the formation of ….… .
(a) shoot apex(b) intrafascicular cambium(c) cork cambium(d) interfascicular cambium
Answer-
(d) interfascicular cambium
(56) Bakane disease in rice is associated with the discovery of ……… .
(a) cytokinins(b) gibberellins(c) auxins(d) ethylene
Answer-
(b) gibberellins
(57) ABA is also known as ……… .
(a) antitoxin(b) antivirulent(c) antioxidant(d) antigibberellin
Answer-
(d) antigibberellin
(58) Gibberellins were first discovered from ……… .
(a) bacteria(b) fungi(c) algae(d) gymnosperms
Answer-
(b) fungi
(59) Which of the following is trace element ?
(a) Mg(b) Nitrogen(c) Sulphur(d) Mn
Answer-
(d) Mn
(60) Which of the following is a macronutrient ?
(a) Ca(b) Mn(c) Zn(d) Mo
Answer-
(a) Ca
(61) Nitrogen is an important constituent of ………. .
(a) carbohydrates(b) sugars(c) proteins(d) polyphosphates
Answer-
(c) proteins
(62) Deficiency of phosphorus causes ……… .
(a) stunted growth(b) inward rolling of leaf margin(c) brittle cell walls(d) necrotic spots
Answer-
(a) stunted growth
(63) Which of the following is not an essential element for plant ?
(a) Sulphur(b) Boron(c) Iron(d) Cadmium
Answer-
(d) Cadmium
(64) ……… is a constituent of middle lamella.
(a) Mg(b) K(c) Ca(d) P
Answer-
(c) Ca
