1) Which of the following is correct about growth?
A) Growth is regarded as one of most fundamental and conspicuous characteristics of living being
B) Growth can be defined as an irreversible permanent increase in size of an organ or its parts or even of an individual cell.
C) Generally growth is accompanied by metabolic processes(both anabolic and catabolic), that occur at the expense of energy
D) All of the above
2) Root apical meristem and shoot apical meristem are responsible for the growth of plants and principally contribute to the elongation of the plants along their axis. This growth is called
A) Primary growth
B) Secondary growth
C) Indeterminate growth
D) Both B & C
3) In dicotyledonous plants and gymnosperms, the lateral meristemsVascular cambium and cork cambium appear later in life. They are the meristems that cause increase in the girth of the organs in which they are active. This is known as
A) Primary growth
B) Secondary growth
C) Indeterminate growth
D) Both B & C
4) A sigmoid or S-curve is a characteristic of
A) Living organism growing in a natural environment
B) Typically all cells, tissues and organs of a plant
C) Root elongation at a constant rate
D) Both A & B
5) It is measure of the ability of the plant to produce new plant material, referred to as
A) Relative growth rate
B) Absolute growth rate
C) Efficiency index
D) Both A & C
6) The simplest expression of arithmetic growth is exemplified by
A) Living organism growing in a natural environment
B) Typically all cells, tissues and organs of a plant
C) root elongation at a constant rate
D) Both A & B
7) Development is the sum of two processes
A) Differentiation and dedifferentiation
B) Growth and cell-division
C) Growth and differentiation
D) Dedifferentiation and re differentiation
8) Auxanometer is required for
A) Studying rate of transpiration
B) Measuring rate of respiration
C) Finding out rate of photosynthesis
D) Calculating rate of growth
9) The living differentiated cells that by now have lost the capacity to divide can regain the capacity of division under certain conditions. This phenomenon is termed as
A) Differentiation
B) Dedifferentiation
C) Redifferentiation
D) Heterophylly
10) The cells derived from root apical and shoot apical meristems and cambium differentiate and mature to perform specific function. This act leading to maturation is termed as
A) Differentiation
B) Dedifferentiation
C) Redifferentiation
D) Heterophylly
11) Interfascicular cambium and cork cambium are able to divide and produce cells that once again lose the capacity to divide but mature to perform specific function. This phenomenon is called
A) Differentiation
B) Dedifferentiation
C) Redifferentiation
D) Heterophylly
12) Which of the following is an example of the dedifferentiation?
A) The formation of tracheary elements (xylem tracheids and xylem vessels)
B) Formation of meristem like interfascicular cambium from fully differentiated parenchyma cells
C) Formation of meristem like cork cambium from fully differentiated parenchyma cells
D) Both B & C
13) Plants follow different pathway in response to environment or phases of life to from different kind of structures. This ability is called
A) Development
B) Differentiation
C) Plasticity
D) Photoperiodism
14) Which of the following is an example of plasticity ?
A) heterophylly in cotton, coriander and larkspur
B) Heterophylly in buttercup
C) Bolting in beet and cabbage
D) Both A & B
15) In some plants , the leaves of the juvenile plant are different in shape from those in mature plants. This is the heterophylly due to phases of life and seen in
A) Cotton, coriander and buttercup
B) Buttercup & larkspur
C) Buttercup only
D) Cotton, coriander and larkspur
16) The PGRs which play an important role in plant responses to wound and stresses of biotic & a biotic origin and also involved in various growth inhibiting activities such as dormancy and abscission , is/are
A) ABA
B) Ethylene
C) Auxin cytokinin and GA
D) ABA and Ethylene
17) The discovery of each of the five major groups of PGRs (auxin,GA, cytokinin, ABA and ethylene) have been accidental .All this started with the observation of
A) F.W .Went
B) E.Kurosawa
C) Skoog and Miller
D)Charles Darwin and his son Francis Darwin
18) Cytokinesis promoting active substa nce is called kinetin which is iden tified, crystallised and termed by
A) F.W .Went
B) E.Kurosawa
C) Skoog and Miller
D) Charles Darwin and his son Francis Darwin
19) During mid-1960s , three independent researchers reported the purification and chemical characterization of three different kinds of inhibitors: inhibitor-B, abscission II and dormin. Later all the three were proved to be chemically identical. It was named
A) Indole acetic acid
B) Indole butyric acid
C) Naphthalene acetic acid
D) Abscisic acid
20) What would be expected to happen if you forget to add cytokinin to the culture medium?
A) There will be no differentiation of root
B) There will be no differentiation of shoot
C) A callus will be produced
D) Nothing would happen
21) What would be happen if a rotten fruit gets mixed with unripe fruits?
A) hastens the ripening of unripe fruits
B) Retards the ripening of unripe fruits
C) Nothing would happen
D) Unripe fruit is now not healthier for consumption
22) Which one of the PGRs would be used by farmers if they are asked to?
a) induce parthenocarpy in tomatoes
b) Hastens fruit ripening in tomatoes and apples
c) Induces flowering in mango
d) Elongation and improvement in shape of apple
e) Promote nutrient mobilisation
A)a-auxins , b-ethephon,c- ethylene, d-GA,e- cytokinin
B)a- ethylene,b-GA,c- auxins ,d- ethephon,e- cytokinin
C))a-auxins, b-ethephon,c- cytokinin,d-ethylene, e-GA
D) a-cytokinin,b- auxin,c-GA,d- ethephon,e-ethylene
23) Read the following statements and find out the incorrect statement
A) Auxins initiates flowering in pineapples and ethylene promotes flowering in pineapples
B) 2,4-D is used to prepare weedfree lawns by gardeners
C) There are more than 100 gibberellins reported from widely different organisms such as fungi and
higher plants. All GAs are acidic
D) The ability of GAs to cause an increase length of axis used to increase the length of grapes stalks
24) The hormone which promotes rapid inter node or petiole elongation in deep water rice plants, also
A) Initiates germination in peanut seeds and sprouting of potato tubers
B) Breaks seed and bud dormancy
C) Inhibits seed germination
D) Both A & B
25) Which one of the PGRs would you use if you are asked to?
1) induce rooting in a twig
2) Quickly ripen a fruit
3) Delay leaf senescence
A) a-auxin,b- ethylene, c-GA
B) a-cytokinin ,b-ethylene, c-GA
C) a-auxin,b- ethylene,c-cytokinin
D) a-cytokinin,b- GA,c-auxin
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