I. Kinetin is a degradative substance from DN | vedclass

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(C) $I.$ Kinetin is a modified form of adenine (a purine) obtained from autoclaved herring sperm $DNA$,making the statement correct.$II.$ $ABA$ (Absci

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$I$ and $III$

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(C) $I.$ Kinetin is a modified form of adenine (a purine) obtained from autoclaved herring sperm $DNA$,making the statement correct.$II.$ $ABA$ (Abscisic acid) is not present in all lower plants; for example,it is absent in many algae and some bryophytes,making the statement incorrect.$III.$ $A$ low ratio of cytokinin to auxin (high auxin,low cytokinin) promotes root initiation,while a high ratio promotes shoot formation,making the statement correct.$IV.$ $ABA$ is synthesized via the mevalonic acid pathway (terpenoid pathway) in plastids,not through glycolysis,making the statement incorrect.Therefore,statements $I$ and $III$ are correct.

List-$I$ (Growth Regulator)	List-$II$ (Function/Effect)
$A$. $2,4-D$	$I$. Brewing industry
$B$. $GA_3$	$II$. Stimulation of stomatal closure
$C$. Kinetin	$III$. Herbicide
$D$. $ABA$	$IV$. Nutrient mobilisation

Column-$I$	Column-$II$
$A$. Cytokinin	$i$. Stimulates closure of stomata
$B$. Ethylene	$ii$. Increases stem length
$C$. Gibberellin	$iii$. Promotes lateral shoot growth
$D$. Abscisic acid	$iv$. Found in large amounts in tissues undergoing senescence

Column-$I$	Column-$II$
$A$. Plant growth promoters	$1$. Auxin
$B$. Plant growth inhibitor	$2$. Gibberellin
	$3$. Abscisic acid
	$4$. Cytokinin

$I.$ Kinetin is a degradative substance from $DNA$.
$II.$ $ABA$ is present in all plants including lower plants.
$III.$ Low ratio of cytokinin to auxin favours root formation only.
$IV.$ $ABA$ is synthesized catabolically through glycolysis pathway.
Choose the correct combination of options.

Similar Questions

Match List-$I$ with List-$II$:
List-$I$ (Growth Regulator) List-$II$ (Function/Effect)
$A$. $2,4-D$ $I$. Brewing industry
$B$. $GA_3$ $II$. Stimulation of stomatal closure
$C$. Kinetin $III$. Herbicide
$D$. $ABA$ $IV$. Nutrient mobilisation

Choose the correct answer from the options given below:

Match the following columns:
Column-$I$ Column-$II$
$A$. Plant growth promoters $1$. Auxin
$B$. Plant growth inhibitor $2$. Gibberellin
$3$. Abscisic acid
$4$. Cytokinin

Select the correct matching for $A$ and $B$.

On touching the leaves of $Mimosa \text{ } pudica$ droop down because of:

Identify two of the following phytohormones,which regulate the stomatal movements?
$I.$ $IAA$
$II.$ $GA_3$
$III.$ $Zeatin$
$IV.$ $ABA$

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$I.$ Kinetin is a degradative substance from $DNA$.$II.$ $ABA$ is present in all plants including lower plants.$III.$ Low ratio of cytokinin to auxin favours root formation only.$IV.$ $ABA$ is synthesized catabolically through glycolysis pathway.Choose the correct combination of options.