Identify the option where all the columns are not correctly matched:
|
PGR |
Nature |
Actions |
1. |
Auxin |
Indole compounds |
Apical dominance, Flowering in pineapples, Parthenocarpy in tomatoes |
2. |
Cytokinin |
Adenine derivative |
|
3. |
Gibberellin |
Terpene |
Increase in length |
4 . |
ABA |
Carotenoid derivative |
Closure of stomata in water stress, inducing seed dormancy, inducing flowering in mango |
The shoot apical meristem in a dicot embryo is located:
(1) Between the two cotyledons
(2) Within the root apex
(3) Around the suspensor
(4) In the endosperm
Primary and secondary growth are inhibited by:
1. Auxins
2. Gibberellins
3. Abscisic acid
4. Cytokinins
Study the graph below and find out that out of A, B and C which has maximum efficiency index
1. A
2. B
3. C
4. Either B or C
How many of the following statement is/are correct?
(1) Both Rhizobium and Frankia are free living in soil and can fix only under symbiotic condition.
(2) Root nodules can be best observed before flowering.
(3) Formation of root nodule takes place as a result of division of cortical and endodermal cell.
(4) When Rhizobium is free living it is aerobic but when it is symbiont it becomes anaerobic to protect Mo-Fe protein.
Options :
1. 4
2. 3
3. 2
4. 1
I. Cytokinin is primarily concerned with cell division.
II. breaks seed and bud dormany in some.
III. ABA stimulates the opening of stomata.
IV. initiates germination in peanut seeds, sproduting of potato tubers.
V. ABA is synergistic to . The false statement is
1. I, II, IV
2. III, V
3. III, IV
4. IV, V
How many of the following statement is/are correct about fate of ammonia is plants?
(1) At physiological pH is protonated to form which cannot be stored as it is toxic.
(2) Most plants can assimilate NH4+ as well as
(3) Assimilation of ammonia can take place by reductive amination as well as transamination.
(4) Tranport of fixed nitrogen in form of amides and ureides take place via xylem vessel.
Options :
1. 4
2. 3
3. 2
4. 1
The correct match is
Column I Column II
I. IAA A. Terpenes
II. GA B. Indole compounds
III. ABA C. Adenine derivatives
IV. D. Gases
V. Kinetin, ( furfuryl amino purine) E. Carotenoid derivatives
1. I – B, II – A, III – E, IV – D, V – C
2. I – A, II – B, III – C, IV – D, V – E
3. I – E, II – D, III – A, IV – B, V – C
4. None
Pruning of tea plants is done to discard the effects of
1.
2. Auxin
3. Cytokinin
4. ABA
Which of the following pair of plants respond to higher temperatures and show higher rate of photosynthesis ?
1. Tomato, Bell pepper.
2. Rice, Wheat.
3. Zea mays, sorghum.
4. Bell pepper, Rice.
Following are the statements related to PGR how many of them are correct?
(1) Auxin is responsible for the phototrophism.
(2) Sterile filtrates of the fungus Gibberella fujikuroi can break seed dormancy.
(3) A ripened orange can cause sprouting in potato.
(4) Extract of maize endosperm can overcome apical dominance.
1. 4
2. 3
3. 2
4. 1
Which of the following hormone pramotes flowering in pineapple?
1. IAA
2.
3.
4. Both 1 and 2
The phytohormone that speed up the malting process in brewing industry is also responsible for
a. Initiates rooting in stem cutting.
b. Increases chloroplast in leaves.
c. Promotes root hair formation.
d. Inhibits seed germination.
e. Promotes seed germination.
f. Promotes internode elongation just prior to flowering.
1. a and c
2. b and d
3. d and f
4. e and f
The permanent tissue that forms the major component within the organs :
1. Provides mechanical support to the growing parts of plant.
2. Is thin-walled and performs the function of photosynthesis, storage and secretion.
3. is made up of four different kinds of elements.
4. Is usually dead without protoplast and has thick lignified cell wall.
In which of the following options the PGR is correctly matched with its two functions?
1. Abscisc acid - (i) Induce immediate stomatal closure in leaves.
(ii) Induce rooting is a twig.
2. Gibberellins - (i) Bolting in rosette plant.
(ii) Speed up the malting process in brewing industry.
3. Ethylene - (i) Delay leaf senescence.
(ii) Controls xylem differentiation.
4. Auxin - (i) Used to kill mocotyledonous weeds.
(ii) Promotes nutrient mobilisation.
Consider the following statements and select the option that correctly fill in the blanks.
A. _________ is used to induce the dormancy of buds and storage organs.
B. _________ speed up the malting process in brewing industry.
C. Senescence is prevented by __________.
A B C
1. Gibberellin Cytokinin GAs
2. Ethylene ABA Cytokinin
3. Cytokinin Auxins ABA
4. ABA GAs Cytokinin
How many of the following is responsible for seed dormancy?
(1) Abscissic acid.
(2) Phenolic acid.
(3) Para ascorbic acid.
(4) Hard seed coat.
(5) Immature embryo.
(6) GA3
Options
1. 5
2. 6
3. 4
4. 3
The phytohormone, which was first isolated from human urine, shows
a. Bolting effect.
b. Apical dominance.
c. Control of xylem differentiation.
d. Promote leaf senescence.
e. Ripening of fruit.
f. Initiation of rooting is stem cuttings.
1. b, c and f
2. a, d and e
3. b, e and f
4. a, b and d
Which of the following about gibberellins is not true ?
1. They have been used to produce ‘Thompson seedless’ grapes
2. Spraying gibberellins stimulates bud formation and fruit set in apples and pears
3. Application of GA promotes elongation of sugarcane internodes
4. Application of GA promotes fast fruit ripening
Which of the following hormone is used for shoot differentiation in callus?
1. 2, 4-D.
2. Benzyl amino purine (BAP).
3. Deformylase.
4. Gibberellic acid.