Q1. Which phase of growth is characterized by maximum cell enlargement and thickening of cell walls?A. Meristematic phaseB. Elongation phaseC. Maturation phaseD. Lag phase
Q2. Which type of growth pattern produces a sigmoid curve?A. Arithmetic growthB. Geometric growthC. Linear growthD. Exponential growth
Q3. Which plant hormone is used for thinning of cotton, cherries, and walnuts?A. GibberellinB. CytokininC. EthyleneD. Auxin
Q4. What happens if cytokinin is not added to a plant tissue culture medium?A. Root formation is inhibitedB. Shoot formation is inhibitedC. Flowering is delayedD. Leaf abscission increases
Q5. Which plant hormone is known as the 'stress hormone'?A. AuxinB. GibberellinC. Abscisic acidD. Cytokinin
Q6. Which of the following about differentiation and dedifferentiation is correct?A. Dedifferentiation is when cells lose their ability to divide.B. Differentiation produces specialized cells.C. Dedifferentiated cells cannot redifferentiate.D. Differentiation is a reversible process.
Q7. Which parameter is commonly used to measure growth in a dorsiventral leaf?A. VolumeB. Cell numberC. Surface areaD. Dry weight
Q8. Who discovered the plant hormone responsible for phototropism?A. E. KurosawaB. Charles DarwinC. F.W. WentD. H.H. Cousins
Q9. Which of the following statements about auxins is incorrect?A. Auxins promote apical dominance.B. Auxins induce parthenocarpy.C. 2,4-D is a synthetic auxin.D. Auxins are produced mainly in roots.
Q10. Which of the following about plant growth measurement is incorrect?A. Growth can be measured by an increase in dry weight.B. Growth can be measured by an increase in cell number.C. Surface area increase is not a measure of growth.D. Fresh weight is used to measure growth.