Quiz - biology - Plant Growth & Development

Q1. Match the PGR with the plants which played role in their discovery –

Column I	Column II
a Auxin	i Tobacco
b Gibberellin	ii Rice
c Cytokinin	iii Orange
d Ethylene	iv Avena

A) a-iii, b-i, c-ii, d-iv
B) a-iv, b-ii, c-i, d-iii
C) a-i, b-iii, c-iv, d-ii
D) a-ii, b-iv, c-iii, d-i

Pg-247

medium

a-iii, b-i, c-ii, d-iv

a-iv, b-ii, c-i, d-iii

a-i, b-iii, c-iv, d-ii

a-ii, b-iv, c-iii, d-i

Q2. Abscisic acid was independent discovered by three different researchers and named as –

Pg-247

easy

Inhibitor-A, abscission-III, dormin

Inhibitor-C, abscission-II, dormane

Inhibitor-B, abscission-II, dormin

Inhibitor-B, abscission-II, dormane

Q3. The term kinetin was given by –

Pg-248

easy

Muller et al

Kurosawa et al

Cousins et al

None of these

Q4. The foolish seedling disease of rice is caused by –

Pg-248

easy

Nematode

Bacteria

Fungus

Virus

Q5. Auxin was isolated by _(i)_ from _(ii)_

(i)	(ii)
A Francis Darwin	Wleoptile of oat seedling
B Francis Darwin	Cleoptile of canary grass
C F.W. Went	Cleoptile of oat seedling
D F.W. Went	Cleoptile of canary grass

Pg-248

easy

Francis Darwin;Wleoptile of oat seedling

Francis Darwin;Cleoptile of canary grass

F.W. Went;Cleoptile of oat seedling

F.W. Went;Cleoptile of canary grass

Q6. The figure shows –

Pg-248

easy

Experiment to show that tip of coleoptile produces gibberelin

Experiment to show that tip of coleorhiza produces gibberelin

Experiment to show that tip of coleorhiza produces auxin

Experiment to show that tip of coleoptile produces auxin

Q7. Auxin was first isolated from –

Pg-248

easy

Xylem sap

Phloem sap

Human urine

Root exudates

Q8. Synthetic auxins –

Pg-248

easy

IAA

IBA

NAA

Both A & C

Q9. Auxin isolated from plant –

Pg-248

easy

NAA

IAA

2, 4-D

Both A & B

Q10. Auxins are generally produced by –

Pg-248

easy

Growing apex of root & shoot

Epidermal tissue of shoots only

Xylem secondary cells

Endodermal cells of roots & shoot

Q11. Assertion: Auxin is used in plant propagation widely.
Reason: Auxin initiate rooting.
Choose the correct option -

Pg-248

medium

Both Assertion and Reason are correct, and Reason is correct explanation of Assertion

Both Assertion and Reason are correct, but Reason doesn't explain Assertion

Assertion is correct but Reason is wrong

Both Assertion and Reason are incorrect

Q12. Auxin promote –

Pg-248

easy

Rooting in stem cutting

Flowering in pineapple

Bolting in beet

Both A & B

Q13. Statement-I Auxin prevent fruit and leaf drop at early stage
Statement-II Auxin promote abscission of older mature leaves & fruits
Choose the appropriate option –

Pg-248

medium

Statement-I is correct and Statement-II is incorrect

Statement-I is incorrect and Statement-II is correct

Both Statement-I & Statement-II are correct

Both Statement-I & Statement-II are incorrect

Q14. Auxin –

Pg-248

easy

Promotes apical dominance

Prevent apical dominance

Both promote & prevent apical dominance based on condition

Can't say

Q15. In tea plantation and hedge -making

Pg-248

easy

Lateral buds are removed

Shoot tips are removed

Root tips are removed

None of these

Q16. Auxin –

Pg-248

easy

Induces parthenocarpy

Act as herbicide

Help in cell division

All of these

Q17. 2, 4-D is used to –

Pg-248

easy

Kill gymnosperms usually

Kill dicot usually

Kill monocot usually

Both A & B

Q18. Gibberellins are

Pg-249

easy

Promotory PGR

Inhibitory PGR

Neither promotory nor inhibitory PGR

Both promotory and inhibitory PGR

Q19. Which of the following statements are incorrect –

Pg-249

easy

There are more than 100 gibberellins reported

GA3 was one of the gibberellins to be discovered

All GA are basic

GAs are also reported in fungi

Q20. Gibberellins is used in grapes for –

Pg-249

easy

Increase in length of stalk

Increase in girth of stalk

Decrease in length of stalk

Decrease in girth of stalk

Q21. Gibberellins –

Pg-249

easy

Promotes senescence

Delay senescence

Neither promote not delay senescence

Both promote & delay senescence based on situation

Q22. Assertion: Spraying gibberellins on fruits extend its market period
Reason: Gibberellins delays senescence
Choose the best option –

Pg-249

medium

Both assertion & reason are correct and reason is correct explanation of assertion

Both assertion & reason are correct but reason is not explanation of assertion

Assertion is correct but reason is wrong

Both assertion & reason are in correct

Q23. Which of these are correct –

Pg-249

easy

ABA shows the malting process in brewing industry

ABA speeds the malting process in brewing industry

GA3 slows the malting process in brewing industry

GA3 speeds the malting process in brewing industry

Q24. Gibberellins is used to improve yields of –

Pg-249

easy

Apple

Grape

Sugarcane

All of these

Q25. Assertion: Juvenile conifers are sprayed with GA
Reason: GA delays senescence and malting period
Which of the given options are correct?

Pg-249

easy

Both assertion & reason are correct and reason is correct explanation of assertion

Both assertion & reason are correct but reason is not explanation of assertion

Assertion is correct but reason is wrong

Both assertion & reason are in correct

Q26. Bolting is –

Pg-249

easy

Yellowing of leaves

Node elongation prior to flowering

Early maturing and seed production

None of these

Q27. GA promote bolting in –

Pg-249

easy

Beet

Cabbage

Plants with rosetle habit

All of these

Q28. Cytokinins were discovered as –

Pg-249

easy

Kinin

Kinetin

Kinesin

Zentin

Q29. Kinetin is a modified form of –

Pg-249

easy

Purine – guanine

Pyrimidine – cytosine

Purine – adenine

Pyrimidine – thymine

Q30. Kinetin was discovered from –

Pg-249

easy

Autoclaved herring egg DNA

Human urine

Corn kernel

None of these

Q31. Read the following statements regarding cytokinin –
i) Kinetin occurs naturally in plants
ii) Kinetin was discovered from coconut milk
iii) Zeatin does not occur naturally in plants
iv) Zeatin was isolated from human DNA
How many of the statements are incorrect –

Pg-249

easy

1

2

3

4

Q32. Natural cytokinin may be synthesized in –

Pg-249

easy

Root apex

Developing shoot buds

Young fruits

More than one option is correct

Q33. Cytokinin helps to produce –

Pg-249

easy

Chloroplast in leaves

Elongation in sugarcane

Synchronized fruit set in pineapple

Flowering in pineapple

Q34. Ethylene is synthesized in large amounts by –

Pg-250

easy

ripening fruit

Tissues undergoing senescence

Newly developed leaves

More than one option is correct

Q35. Ethylene causes _(i)_ growth of seedling, swelling of axis and apical hook formation in _(ii)_ seedling

(i)	(ii)
A) Horizontal	Monocot
B) Vertical	Dicot
C) Horizontal	Dicot
D) Vertical	Monocot

Pg-250

easy

Horizontal;Monocot

Vertical;Dicot

Horizontal;Dicot

Vertical;Monocot

Q36. Ethylene promotes –

Pg-250

easy

Senescence and abscission of flowers

Senescence but not abscission of flowers

Abscission of flowers but not senescence

Neither senescence nor abscission of flowers

Q37. Ethylene in fruits causes –

Pg-250

easy

Rise in rate of respiration called respiratory anti-climactic

Rise in rate of respiration called respiratory climactic

Fall in rate of respiration called respiratory anti-climactic

Fall in rate of respiration called respiratory climactic

Q38. Ethylene –

Pg-250

easy

Promotes seed and bud dormancy

Promotes only seed dormancy

Promotes only bud dormancy

None of these

Q39. Statement-I Ethylene promotes internode/petiole elongation in deep water rice plants
Statement-II ethylene helps upper part of shoot to remain above water.
Choose the appropriate option –

Pg-250

easy

Statement-I is correct and Statement-II is incorrect

Statement-I is incorrect and Statement-II is correct

Statement-I and Statement-II are correct

Statement-I and Statement-II are incorrect

Q40. Ethylene –

Pg-250

easy

Promotes root hair formation and increase in absorption surface

Demotes root hair formation and increase in absorption surface

Promotes root hair formation and decrease in absorption surface

Demotes root hair formation and decrease in absorption surface

Q41. Ethylene initiates –

Pg-250

easy

Flowering in pineapple

Flowering in mango

Synchronizing fruit-set in pineapple

All of these

Q42. Most widely used source of ethylene –

Pg-250

easy

Is ethepene

Hasters fruit ripening in tomato and apple

In aqueous solution is absorbed on the plant roots

More than one option is correct

Q43. Ethylene promotes –

Pg-250

easy

Female flowers in cucumber, increasing the yield

Female flowers in cucumber, decreasing the yield

male flowers in cucumber, increasing the yield

male flowers in cucumber, decreasing the yield

Q44. ABA is –

Pg-250

easy

Inhibitor of plant growth and metabolism

Inhibitor of plant growth but not metabolism

Inhibitor of plant metabolism but not growth

Inhibitor of neither plant growth nor metabolism

Q45. ABA –

Pg-250

easy

Inhibit seed germination

Promote seed dormancy

Inhibit seed dormancy

Both A & B

Q46. ABA is called stress hormone because

Pg-250

easy

It causes stress to plant

It is released during stress in plant

It helps plant to fight stress conditions

More than one option is correct

Q47. ABA stimulates –

Pg-251

easy

Stomata opening for more CO2 exchange

Stomata closure to decrease transpiration

Stomata opening to cause transpiration & calling effect

Both A & C

Q48. In most situation, ABA acts as an antagonist to-

Pg-251

easy

Auxin

GA

Cytokinin

Ethylene

Loading...

Biology - Plant Growth & Development

Loading...

Biology - Plant Growth & Development

Image Preview