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level: Level 1

Questions and Answers List

level questions: Level 1

Question	Answer
which of the following hormone induces cell division	cytokinin
which is a weedicide ?	2,4-D
a plant cell has potential to develop into a full plant. this is called	totipotency
the plant hormone controlling fruit ripening is	ethylene
induction of cell division and delay in senescence is done by	cytokinins
curling of tendrils is due to	thigmotrophism
bud dormacy can be inuced by	ABA
avena curvature test is a bioassay for examining the activity of	auxins
induction of cell division and delay is senescence is one by	cytokinins
gibberellins can promote seed germination because of their influence on	prouction of hyrolyzing enzymes
senescence as an actie developmental cellular process in the growth and functioning of a flowering plant,is indicated in	leaf abscission
movement of leaves of mimosa pudica are due to	seismonasty
thigmotropic movement is best shown by	movement in tendrils
phytohormones are	regulators synthesided by plants and influencing physiological processes
fruit and leaf drop at an early age can be prevented by the application of	auxins
what is a stress hormone/ produced during extreme conditions	abscisic acid
auxetic growth is	increase in cell volume only
a chemical believed to be involved in flowering is	florigen
a plant hormone used for inducing morphogenesis in plant tissue culture is	cytokinins
which combination of gases is suitable for fruit ripening	80 per cent C2H4 and 20 per cent CO2
ABA is involved in	increased cell division
which hormone prevents falling of fruits	NAA
hormone responsible for senescence	ABA
dwarfness can be controlled by treating plant with	gibberellic acid
seed dormancy is due to the	abscisic acid
plants deficient of element zinc, show its effect on the biosynthesis of plant growth hormone	auxin
differentitation of shoot is controlled by	high cytokinin: auxin ratio
cell elongation in the internodal region of the green plants takes place due to	gibberellins
the pigment that absorbs red and far red light in plants is	phytochrome
which one is a long day plant	spinach
proteinaceous pigments which control activities concenred with light	phytochrome
the method that renders the seed coat permeable to water so that embryo expansion is not physically retarded is	scarification
the response of different organisms to environmental rhythms of light and darkness is called	photoperiodism
what will be the effect on phytochrome in a plant subjected to continous red light	level of phytochrome decreases
in short day plants, flowering is induced by	photoperiod below a critical length and uninterrupted long night
flowering dependent on cold treatment is	vernalisation
which one increases in the absence of light	elongation of internodes
which one of the following can replace vernalisation	gibberellins
phytochrome is involved in	photoperiodism
treatment of seed at low temperature under moist condition to break its dormancy is called	stratification
vernalization stimulates flowering in	carrot
leaf fall can be prevented with the help of	cytokinins
abscisic acid controls	leaf fall and dormancy
hormone primarily concerned with cell division is	cytokinin/zeatin
abscisic acid causes	stomatal closure
the hormone responsible for apical dominance is	IAA
cytokinins	helps retain chlorophyll
the regulator which retards ageing /senescence of plant parts is	cytokinins
auxin can be bioassayed by	avena coleoptile curvature
an enzyme that can stimulate germination of barley seeds is	alpha-amylase
foolish seedling disease of rice lead to the discovery of	GA
abscissic acid	stomatal closure
which acid is a derivative of carotenoids	abscisic acid
one of the synthetic auxin is	NAA
acts as an antagonist to gibberlins	ABA
the pineapple whhich under natural conditions is difficult to blossom has been made to produce fruits throughout the year of application of	NAA, 2,4-D
during seed germination its stored food is mobilized	gibberlins
a few normal seedlings of tamato were kept in a dark room. after a few days they were found to have become white coloured like albinos. which term is used to describe them	etiolated
DR F. Went noted that if coleoptile tips were removed and placed on agar for an hour, the agar would produce a bending when placed on one side of freshly cut coleoptile stumps. significance is	it demonstrates polar movement of auxins