Plant Hormones Quiz

A plant hormone or phytohormone is a chemical substance produced naturally in plants which is translocated to another region for regulating one or more physiological reactions when present in low concentration. All phytohormones are growth regulators but all growth regulators are not phytohormones. Phytohormones can be broadly divided into two groups based on their functions in a living plant body- growth promoters and growth inhibitors. Auxin, gibberellins and cytokinin are growth promoters and ethylene and abscisic acid (ABA) are growth inhibitors. Read more>>



1. Apical dominance is affected by the hormone
IAA
ABA
GA
ethylene
2. Genetic dwarfness can be overcome by treatment with
auxins
gibberllins
auxins and cytokinins
ABA
3. To prevent over ripening, banana should be
stored on top of the refrigerator
given a dip in ascorbic acid
maintained at room temperature
refrigerated
4. Aging of plant organs can be delayed with the help of the hormone
auxin
ethylene
cytokinin
abscisic acid
5. Auxins are
growth catalysts
destroyers of growth
growth inhibitor
growth hormones
6. Bioassay for gibberellins is
Seed dormancy test
green leaf test
Avena curvature test
Dwarf maize test
7. Artificial ripening of fruits is accomplished by treatment with
Ethylene gas
IAA
Kinetin
Sodium chloride
8. Which of the following affects of auxins on plants are the basis for commercial application?
callus formation
curvature of stem
induction of root formation in stem cuttins
all of these
9. A green plant bends towards the source of light when exposed to the light on only one side. Which of the following is the best explanation of the phenomenon?
Light reduces length
They need light for photosynthesis
The apices of their stems are attracted by the light
Auxin accumulates on the shaded side to induce greater cell elongation on the side
10. Delay in senescence is caused by the spray of
IBA
GA
ABA
Cytokinin
Score =
Correct answers:

0 comments:

Post a Comment