Question

Blue light is effective in phototropism.

• A. True
• B. False

Answer 1

The correct option is A True

Application of unilateral light triggers the curvature of growing plant organs away or towards the light source. This phenomenon is known as phototropism. Four different types of photoreceptors have been identified in plants. Among them is a small family of proteins known as the phototropins, which are activated specifically by UV/blue wavelengths of light. The photoactivation of these proteins stimulates a range of processes that ultimately optimize the photosynthetic efficiency of plants, including phototropism.

So, the correct answer is option A.