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生物 大学生・専門学校生・社会人

至急お願いいたします🚨 生物の質問です。 ミトコンドリアの経路についての説明だと思うのですが、電子オーバーフローモデルと電子分布モデルの違いを教えていただきたいです。 また、どういう仕組みなのか、何故このように電子が流れるのかも教えていただきたいです。 UQ poolはユ... 続きを読む

(A) Electron overflow model (considered out-of-date) Alt UQ pool Alternative oxidase inactive. Alt No alternative pathway activity Cytochrome pathway unsaturated Cyt (B) Electron distribution model (reflects current thinking) UQ pool Cyt Alternative pathway active Cytochrome pathway saturated Alt Alternative oxidase active Alt UQ pool Cyt Cyt Figure 14.33 Two models for regulation of electron flow through the alternative oxidase. (A) In the electron overflow model, no appreciable electron transfer through the alternative pathway takes place until electron flow through the cytochrome pathway is at or near satu- ration. This could result from the effects of respirato- ry control, if the rate of mitochondrial ATP produc- tion exceeds its rate of utilization in the cytosol, or from some externally imposed stress, such as low temperature. Under such circumstances, the UQ pool becomes sufficiently reduced to allow electrons to flow through the alternative oxidase, the latter re- quiring that the UQ pool be 40% to 60% reduced to attain significant activity. (B) In the electron distribu- tion model, the alternative and cytochrome path- ways both show significant activity at low levels of UQ pool reduction, and electrons are distributed be- tween the two pathways on the basis of the relative activities of each pathway. The activity of the alter- native oxidase under these circumstances is thought to be regulated by the action of a-keto acids and by reduction/oxidation of the intermolecular disulfide bond, as well as by additional regulatory mecha- nisms not yet characterized.

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TOEIC・英語 大学生・専門学校生・社会人

【至急】この穴埋め問題の答えを教えて欲しいです。

Progress test (Part 1) Drag the words into the correct spaces. some of few 1/2 some a few enough neither lots of both little every each no information about attractions in the city. There are Coming to London for a weekend? Here's interesting places to visit - you won't have time to see them all. Firstly, visit to London would be complete without seeing Big Ben. The clock at the Houses of Parliament has become a symbol of London, but few✔ tourists know that Big Ben is actually the name of the bell, not day, so arrive early. the clock or the clock tower. On the opposite side of the river is the London Eye, the world's biggest observation wheel. holding 25 people, but there are still queues nearly There are 32 sections, If you'd like somewhere scientific, you could go to the Natural History Museum or the Science Museum. Entry to of these appeal to you, you may prefer Madame Tussaud's, the museum where is free. Or, if you can meet the world's most famous people made of wax. You could meet the Queen of England there, or you could hope to see her at Buckingham Palace, her London home, just the most valuable jewels in the world. stops away on the London Underground 'Tube' train. If you want to see more royal palaces, try the Tower of London, where you can see the Crown Jewels, If that isn't for one trip, why not go to Shakespeare's Globe Theatre, a reconstruction of the 1599 theatre extra money, you can even see a play there. where his plays were performed. If you have a

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