Question

Circadian rhythms in plants. Circadian rhythms are common in plants. Which of the following plant processes are likely to be influenced by circadian rhythms? (Check all that apply.) Check All That Apply o Photosynthetic activity o Flowering o Root nodule formation o Opening and closing of the stomata o Fragrance emission

Answer 1

Ans-1- Following are the processes affected by circadian rhythm-

Growth, leaf movement, gas exchange, flowering, germination fragrance emission, and photosynthetic activity. So except root nodule formation, all the processes are affected by circadian rhythm.

Ans-2- Gibberlic acid is compulsory for the germination of seed because it induces the expression of genes involved in the breakdown of stored starch. without GA seed germination can not occur. False.

Ans-3- Expansin is a protein responsible for cell elongation. The protein is active at acidic pH. Since the pH is increasing the protein would be inactive, hence there would not be cell elongation.  False.