Plant Growth and Development - Live Session - 15 MarchContact Number: 8527521718Plant Growth and Development - Live Session - 15 MarchContact Number: 8527521718Growth in plant organs is :
1. Qualitative and extrinsic
2. Quantitative and intrinsic
3. Qualitative and intrinsic
4. Quantitative and extrinsic
Find out the correct statement(s).
(a) Growth in plants is internal/intrinsic and open-ended
(b) Formation of cellular materials is called real or protoplasmic growth
(c) Plant growth is diffused only during the early embryonic stage
1. Only (a) & (b)
2. (b) only
3. Only (b) & (c)
4.(a), (b) & (c)
Find odd one with respect to differentiation
| 1. | Loss of nucleus in the sieve |
| 2. | Death of protoplasm in tracheary elements |
| 3. | Callus formation |
| 4. | Lignification in vessels |
Which of the given is/are examples of differentiation?
| 1. | Loss of nucleus and perforations in some sieve-tube members |
| 2. | Lignin deposition in tracheids and vessels |
| 3. | Differential wall thickening in guard cells |
| 4. | More than one option is correct |
If an etiolated stem could be first saturated with auxin by spraying and then exposed to a streak of light from one side, it will
1. Bend towards the light
2. Bend away from the light
3. Grow straight upwards
4. Be prevented from growing
Which is not a physiological effect of auxins?
| 1. | Cell elongation |
| 2. | Development of parthenocarpic fruits |
| 3. | Prevention of abscission of leaves and fruits |
| 4. | Reversal of genetic dwarfism |
Pruning of tea plants is done to discard the effects of
1.
2. Auxin
3. Cytokinin
4. ABA
Specific property attributed to GA is
(1) Shortening of genetically tall plants
(2) Elongation of genetically dwarf plants
(3) Rooting of stem cuttings
(4) Promotion of leaf and fruit fall
The phytohormone combination which is the key regulator of cell differentiation and morphogenesis is
1. Cytokinin & IAA
2. IAA & ABA
3. IAA &
4. Cytokinin & Gibberellin
Which is not true for abscisic acid?
| 1. | Acts as antitranspirant |
| 2. | Synthesized in chloroplast from carotenoids |
| 3. | Increases stress tolerance in plants |
| 4. | Induces epinasty of leaves and flowers |
The typical growth curve in plants is
(1) Parabolic
(2) Sigmoid
(3) Linear
(4) Stair-steps shaped
Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in
| 1. | Floral parts |
| 2. | Vessels and tracheid differentiation |
| 3. | Leaf abscission |
| 4. | Annual plants |
Importance of day length in the flowering of plants was first shown in
(1) Petunia
(2) Lemna
(3) Tobacco
(4) Cotton
“Foolish Seedling” disease of rice led to the discovery of
(1) IAA
(2) GA
(3) ABA
(4) 2, 4 – D
Opening of floral buds into flowers is type of:
| 1. | Autonomic movement of growth |
| 2. | Autonomic movement of locomotion |
| 3. | Autonomic movement of variation |
| 4. | Paratonic movement of growth |
Which one of the following pairs, is not correctly matched?
(1) IAA – Cell wall elongation
(2) Abscisic acid – Stomatal closure
(3) Gibberellic acid – Leaf fall
(4) Cytokinin – Cell division
In which of the following plants' leaves of the juvenile phase are different in shape from those in the mature phase?
1. Cotton, Buttercup
2. Larkspur, Ranunculus
3. Coriander, Ivy
4. More than one option is correct
Which of the following is not naturally occurring plant hormone?
(1) IAA
(2) IBA
(3) 2, 4-D
(4) Zeatin
The pigment which absorbs red and far-red light is
1. Phytochrome
2. Xanthophyll
3. Cytochrome
4. Carotene
Effect of low temperature which shortens the vegetative period and hastens flowering is
(1) Photoperiodism
(2) Quiescence
(3) Vernalisation
(4) Abscission
Choose the odd one out with respect to SDP
(1) Cocklebur
(2) Henbane
(3) Sugarcane
(4) Coffee
Acetyl CoA is a precursor for
1. Auxin
2. Cytokinin
3. Gibberellins
4. ABA
Which of the following hormone fits in both categories i.e., inhibitor and promotor?
(1) Cytokinins
(2) Ethylene
(3) Auxin
(4) Gibberellins
Hypocotyl grows first and cotyledons come out of the soil during germination of
1. Rice
2. Maize
3. Mango
4. Mustard
If a viable seed fails to germinate in favorable conditions then it is called
(1) Dormancy
(2) Quiescence
(3) Senescence
(4) Abscission
About ETS which one is not correct?
(1) Present in the inner mitochondrial membrane
(2) Complex I is related to NADH dehydrogenase
(3) Cytochrome bc1 complex is also known as complex III
(4) Complex IV coupled with ATP synthase
The response of plants to periods of day and night was first observed in
(1) Rice
(2) Tomato
(3) Sunflower
(4) Tobacco
Apples are usually wrapped in waxed paper to
| 1. | Make them look attractive |
| 2. | Prevent dormin formation due to injury |
| 3. | Prevent aerobic respiration by checking the entry of oxygen |
| 4. | Prevent sunlight from changing its colour |
Dwarf maize test and Avena curvature test are bioassays of respectively
| 1. | IAA and Ethylene |
| 2. | Gibberellins and Cytokinins |
| 3. | Auxins and Cytokinins |
| 4. | Gibberellins and Auxins |
The hormone which can replace long days and low-temperature requirements for flowering in some plants is
1. Ethylene
2. Auxins
3. Gibberellins
4. Cytokinins
Choose an incorrect match
| 1. | IAA – Tryptophan |
| 2. | \(\mathrm{CH}_2=\mathrm{CH}_2\) – Methionine |
| 3. | Gibberellins – Succinyl coA |
| 4. | Cytokinins – tRNA |
Formation of cork from cork cambium is
1. Redifferentiation
2. Differentiation
3. Stratification
4. Dedifferentiation
Match the following
| Column I | Column II | ||
| a. | Cytokinins | (i) | Delay senescence |
| b. | IAA | (ii) | Horizontal growth of seedling |
| c. | GA | (iii) | Xylem differentiation |
| d. | Ethylene | (iv) | Translocation of sugars |
| 1. | a(iv), b(iii), c(i), d(ii) |
| 2. | a(ii), b(iv), c(i), d(iii) |
| 3. | a(ii), b(i), c(iv), d(iii) |
| 4. | a(iii), b(ii), c(iv), d(i) |
_____ shows plasticity in response to its prevailing environment.
1. Coriander
2. Cotton
3. Larkspur
4. Buttercup
ABA is useful in
| 1. | Increasing length of stalks in grapes |
| 2. | Cell division |
| 3. | Seed development |
| 4. | Germination of peanut seeds |
The germination and seedling development in beans is
1. Viviparous
2. Hypogeal
3. Epigeal
4. Quiescence
Which of the following is incorrect with respect to Abscisic acid?
| 1. | In most situations, it acts as an antagonistic hormone to gibberellins |
| 2. | It promotes bud dormancy during winters |
| 3. | It helps in the closing of stomata |
| 4. | It helps in sprouting in potato |
How many of the following functions are correct for cytokinins?
Adventitious shoot formation, Promote femaleness, Leaf development,
Root initiation, Cell division, Parthenocarpy
1. Five
2. Four
3. Three
4. Six
Select the incorrect statement with respect to Gibberellins
| a. | Some GAs are acidic |
| b. | They delay senescence |
| c. | Used to increase the length of grape stalks |
| d. | Promotes bolting just after flowering |
1. a & b
2. a & d
3. b & c
4. c & d
Growth of pollen tube is measured in terms of
1. Surface area
2. Cell number
3. Cell size
4. Length
Find the odd one out with respect to synthetic auxins
(1) IBA
(2) 2, 4, 5-T
(3) NAA
(4) 2, 4-D