Wired Faculty
Wilting of leaves at noon and their recovery toward evening is known as
incipient wilting
temporary wilting
midday desiccation
permanent wilting
B.
temporary wilting
Temporary of transient wilting occurs during midday and is visible externally due to drooping of leaves and young shoot. It is corrected in the afternoon when transpiration decreases.
Which of the following induces and promotes cell division?
ABA
Auxin
Cytokinin
Gibberellin
C.
Cytokinin
Cytokinin is a plant cell division hormone, i.e. it induces and promotes cell division in plants. It is primarily involved in cell growth and its differentiation. It also affects apical dominance, axillary bud growth and leaf senescence.
Artificial application of auxins like IAA, IBA and NAA to unpollinated pistils can form
fruits with much flash
larger fruits
sweet fruits
seedless fruits
D.
seedless fruits
The auxin's application on unpollinated pistils develops into seedless fruits and parthenocarps, which carry a better market price than normal fruits.
Internodal elongation is stimulated by
auxin
cytokinin
gibberellin
phenol
C.
gibberellin
The gibberellins induce internodal elongation. When the lettuce plants are treated with gibberellin, they become wine like.
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In the electron transport chain, in terminal oxidation, the cytochrome, which donates electrons to O2 is
cytochrome- b
cytochrome- c
cytochrome- a3
cytochrome- a
C.
cytochrome- a3
The cytochrome- a3 is an electron carrier which contains copper with iron. It picks up electrons and through copper, it hands over electrons to oxygen. Oxygen accepts electrons finally.
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