1. Chlorosis, i.e., yellowish hue on the leaves results from
Accumulation of toxic waste products in leaves.
Deficiency of chlorophyll.
Short supplies of mineral nutrients in the soil.
All of these
✅ The correct answer is option D.
Coordination and Control MCQs
2. Chemically auxins are
Indole propionic acid.
Indole carboxylic acid.
Indole acetaldehyde
Indole acetic acid
✅ The correct answer is option D.
3. Gibberellins may be substituted for _____ light, therefore promote flowering in long day plants.
White
Red
Blue
Green
✅ The correct answer is option B.
4. Which of the following is an antagonist to Auxin in terms of promotion of stem growth?
Gibberellins
Cytokinins
Abscisic Acid
none of these
✅ The correct answer is option C.
5. Abscisic acid promotes flowering in short day plants and inhibits in long day plants, which of the following is antagonistic to abscisic acid in terms of flowering:
Gibberellins
Cytokinins
Auxins
Ethene
✅ The correct answer is option A.
6. The only promoter of leaf senescence in the following plant hormones is:
Gibberellins
Cytokinins
Auxins
Abscisic Acid
✅ The correct answer is option D.
7. Which of the following is used in the brewing industry to promote malting:
Gibberellins
Cytokinins
Auxins
Abscisic Acid
✅ The correct answer is option A.
8. Which type of the receptors are present in the ear?
Chemoreceptors
Mechanoreceptors
Photoreceptors
Thermoreceptors
✅ The correct answer is option B.
9. Type of sensations carried by nociceptors are:
Touch
Temperature.
Pressure
Pain
✅ The correct answer is option D.
10. Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips?
Hair end organs
Meissner’s Corpuscles.
Pacinian corpuscles
None of these
✅ The correct answer is option B.