Auxin can be bioassayed by?

1. Avena coleoptiles curvature

2. Hydroponics

3. Ptometer

4. Lettuce hypocotyl elongation

Subtopic:  Growth Hormones & Auxin |
 90%
NEET - 2015
Please attempt this question first.
Hints

What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows?

1. Green plants need light to perform photosynthesis
2. Green plants seek light because they are phototropic
3. Light stimulates plant cells on the lighted side to grow faster
4. Auxin accumulates on the shaded side, stimulating greater
cell elongation there

Subtopic:  Growth Hormones & Auxin |
 79%
NEET - 2015
Please attempt this question first.
Hints

Dr. F. Went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly - cut coleoptile stumps. What is the significance of this experiment?
 

1. It made possible the isolation and exact identification of auxin.
2. It is the basis for the quantitative determination of small amounts of growth-promoting substances.
3. It supports the hypothesis that IAA is auxin.
4. It demonstrates the polar movements of auxins.

Subtopic:  Growth Hormones & Auxin |
AIPMT - 2014
Please attempt this question first.
Hints

Phototropic curvature is the result of uneven distribution of:

1. gibberellin

2. phytochrome

3. cytokinins

4. auxin

Subtopic:  Growth Hormones & Auxin |
 79%
AIPMT - 2010
Please attempt this question first.
Hints

One of the commonly used plant growth hormone in tea plantations is:

1. Abscisic acid 2. Zeatin
3. Indole-3- acetic acid 4. Ethylene
Subtopic:  Growth Hormones & Auxin |
 76%
From NCERT
AIPMT - 2010
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Root development is promoted by:
1. Auxin
2. Gibberellin
3. Ethylene
4. Abscisic acid

Subtopic:  Growth Hormones & Auxin |
 76%
From NCERT
AIPMT - 2010
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

One of the synthetic auxin is:

1. NAA

2. IAA

3. GA

4. IBA

Subtopic:  Growth Hormones & Auxin | Auxin Function |
 84%
From NCERT
AIPMT - 2009
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh