Use the following information to answer the question. Paulinella chromatophora is one of the few cercozoans that is autotrophic, carrying out aerobic photosynthesis with its two elongated "chromatophores." The chromatophores are contained within vesicles of the host cell, and each is derived from a cyanobacterium, though not the same type of cyanobacterium that gave rise to the chloroplasts of algae and plants. A crucial photosynthetic gene of the cyanobacterium that gave rise to the chromatophore is called psaE. This gene is present in the nuclear genome of the cercozoan, but is not in the genome of the chromatophore. This is evidence of ________.

#Question id: 11841

#Unit 6. System Physiology – Plant

Multiple  isoforms of ethylene receptors may be present in a cell. The receptor is a dimer, held together by______X_________. Ethylene binds within the transmembrane domain, through________Y______, which is assembled into the ethylene receptors.

#Question id: 11842

#Unit 6. System Physiology – Plant

What is the function of EIN3 in ethylene signalling pathway?

#Question id: 11843

#Unit 6. System Physiology – Plant

During an experiment Six-day-old pea seedlings were grown in the dark in the presence of 10 ppm (parts per million).  Firstly, Grown seedling treated with ethylene and secondly grown seedling left untreated. What will be the conclusion has been drawn from this experiments?      

#Question id: 11844

#Unit 6. System Physiology – Plant

The following statements are made to describe the biosynthetic pathway of IAA;

a)  IPA pathway involves a deamination reaction to form IPA, followed by a decarboxylation reaction to form indole-3-acetaldehyde (IAld) and then oxidized to IAA by a specific dehydrogenase

b) IAN pathway is similar to the IPA pathway, except that the order of the deamination and decarboxylation reactions is reversed, and different enzymes are involved

c) IAM pathway  involves the two enzymes  tryptophan monooxygenase and IAM hydrolase

d) In the IAN pathway, tryptophan is first converted to indole-3-acetaldoxime and then to indole-3-acetonitrile. The enzyme that converts IAN to IAA is called nitrilase

Which of the following is the correct  statements  of about the biosynthesis of  IAA?

#Question id: 11845

#Unit 6. System Physiology – Plant

IAA Is synthesized from__

#Question id: 11846

#Unit 6. System Physiology – Plant

In maize  orange pericarp (orp) mutant is