The cis and trans GroEL rings undergo conformational changes in a reciprocating fashion, with events in one ring influencing events in the other ring. The entire GroEL/ES chaperonin complex functions as follows;

a) One GroEL ring that has bound 7 ATP also binds an improperly folded substrate protein, which associates with hydrophobic patches that line the inner wall of the GroEL chamber

b) The GroES cap then binds to the GroEL ring like a lid on a pot, inducing a conformational change in the resulting cis ring

c) Within ~10 s the cis ring catalyzes the hydrolysis of its 7 bound ATPs and releases the resulting Pi , which weakens the interactions binding GroES to GroEL

d) A second molecule of improperly folded substrate protein binds to the cis ring, followed by 7 ATP

e) The binding of substrate protein and ATP to the cis ring conformationally induces the trans ring to release its bound GroES, 7 ADP, and the presumably now better-folded substrate protein

Which of the following is incorrect functions of GroEL/ES chaperonin complex?

#Question id: 10203

#Unit 6. System Physiology – Plant

Light-response curves of photosynthetic carbon fixation in sun and shade plants. Typically, shade plants have a low light compensation point and have lower maximum photosynthetic rates than sun plants this is because respiration rates in shade plants are very low; which of the following graph is correct?

#Question id: 10204

#Unit 6. System Physiology – Plant

When exposed to excess light, leaves must dissipate the surplus absorbed light energy to prevent damage to the photosynthetic apparatus. There are several routes for energy dissipation that involve,

#Question id: 10205

#Unit 6. System Physiology – Plant

The xanthophyll cycle, which comprises the three carotenoids violaxanthin, antheraxanthin, and zeaxanthin, establishes an ability to dissipate excess light energy in the leaf, Under high light the conversion of the carotenoids such as

#Question id: 10206

#Unit 6. System Physiology – Plant

The excess energy is absorbed by three carotenoids molecules such as violaxanthin, antheraxanthin, and zeaxanthin, which of the following statements correct about these molecules?

#Question id: 10207

#Unit 6. System Physiology – Plant

In high light, violaxanthin is converted into zeaxanthin, via the intermediate antheraxanthin by the enzyme known as

#Question id: 10208

#Unit 6. System Physiology – Plant

The large amounts of energy absorbed by the pigments if this energy cannot be stored by photochemistry, this is why a protection mechanism is needed Protection against photodamage is a multilevel process what role does the first line of defense play to suppress from damage?