Free Test Growth – NEET

Q1: Which plant hormone is primarily responsible for cell elongation?

A. Auxin B. Cytokinin C. Gibberellin D. Ethylene

Q2: What is the name of the growth phase in which the cell size increases?

A. Meristematic phase B. Maturation phase C. Elongation phase D. Differentiation phase

Q3: The term “plasticity” in plant growth refers to:

A. Genetic mutations B. Response to gravity C. Adaptability in form due to environment D. Water absorption

Q4: Which phase comes after the elongation phase in plant growth?

A. Maturation phase B. Differentiation phase C. Meristematic phase D. Dormant phase

Q5: What is the shape of the typical growth curve of a plant?

A. S-shaped B. Z-shaped C. U-shaped D. L-shaped

Q6: Which hormone promotes seed dormancy?

A. Auxin B. Cytokinin C. Gibberellin D. Abscisic acid

Q7: Which plant growth hormone promotes cell division?

A. Auxin B. Cytokinin C. Gibberellin D. Ethylene

Q8: The region in roots where active cell division occurs is called:

A. Zone of elongation B. Zone of differentiation C. Root cap D. Meristematic zone

Q9: What causes bolting in rosette plants?

A. Low temperature B. High oxygen C. Application of gibberellin D. Low water

Q10: Which environmental factor does not affect plant growth?

A. Light B. Temperature C. Soil pH D. Sound

Q11: Which process marks the end of cell growth?

A. Mitosis B. Differentiation C. Elongation D. Dormancy

Q12: Which of the following is a natural growth inhibitor?

A. IAA B. ABA C. GA3 D. Zeatin

Q13: Photoperiodism affects which of the following processes?

A. Respiration B. Transpiration C. Seed dormancy D. Flowering

Q14: Which plant hormone delays senescence?

A. Gibberellin B. Auxin C. Cytokinin D. Ethylene

Q15: Growth in plants is generally:

A. Finite B. Reversible C. Indefinite D. Discontinuous

Q16: Which of the following statements is correct about growth in plants?

A. It is a reversible process. B. It stops after maturity. C. It is always measurable. D. It cannot be influenced by hormones.

Q17: The increase in volume of a plant cell is mainly due to:

A. Protein synthesis B. Cell wall expansion C. Water uptake D. Photosynthesis

Q18: In which region of the root is the rate of cell division the highest?

A. Maturation zone B. Zone of elongation C. Meristematic zone D. Root cap

Q19: What does the term "differentiation" in plants refer to?

A. Increase in number of cells B. Formation of new organs C. Maturity of cells into specific functions D. Death of cells

Q20: Apical dominance in plants is controlled by which hormone?