Following statements are regarding to the phosphoinositide pathway.

A. many activated RTKs and cytokine receptors initiate phosphoinositide pathway by recruiting the enzyme phosphatidylinositol-3 kinase (PI-3 kinase) to the membrane.

B. PI-3 kinase adds a phosphate to the 3′ carbon in one of two separate phosphatidylinositol substrates, leading to formation of two phosphatidylinositol 3-phosphates: PI(3,4)P2 or I(3,4,5)P3

C. PI-3 kinase pathway can trigger cell division and prevent apoptosis, thus ensuring cell survival by the activation of PKB.

D. Activated PKB phosphorylates FOXO3a, which induces the expression of several antiapoptotic genes.

Which of the following combination is correct?

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#Question id: 10253

#Unit 6. System Physiology – Plant

Two pathways for the splitting of sucrose are known in plants, both of which take part in the use of sucrose from phloem unloading;

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#Question id: 9268

#Unit 6. System Physiology – Plant

The most active photosynthetic tissue in higher plants is the

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#Question id: 9271

#Unit 6. System Physiology – Plant

Chlorophylls a and b are abundant in green plants, and c and d are found in some protists and cyanobacteria. A number of different types of bacteriochlorophyll have been found; which type of chlorophyll is the most widely distributed, shows the distribution of pigments in different types of photosynthetic organisms;

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#Question id: 9274

#Unit 6. System Physiology – Plant

The different types of carotenoids found in photosynthetic organisms, the all carotenoids are

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#Question id: 9275

#Unit 6. System Physiology – Plant

The colour of carrots, is due to;

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#Question id: 9277

#Unit 6. System Physiology – Plant

The light energy absorbed by the carotenoids is transferred to chlorophyll for photosynthesis; because of this role they are called