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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(A) Electron overflow model (considered out-of-date) Alt UQ pool Alternative oxidase inactive.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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英語 中学生

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北海道 26 年度 B なの英文は,英語の授業で,絵美のグループがお互いにインタビューをした結果を表(table) にまとめたものです。これを読んで, 問いに答えなさい。 What did you do in your free time last weekend? aM Group A Name Emi MPA If your group members did each *activity, please put " 0" in its *box under the name of each member. blrow adt alollinme otermotni Your Name not ballool Group members Emi Kota Shiho Taku Miho Activities read 番 0 0|0 0 at home use the Internet 0 bobs w 0 Tuq of berd do *housework 0 play sports go shopping do volunteer work 0 *outside。 0|0 0 the home 0 0 (注) activity (activities) 活動 oulor Outside the home 家の外で,家の外の box 空欄,マス D9 housework 家事 0aM comethijs 問1 次の(1), (2) の問いに対する答えとして最も適当なものを,それぞれア~エから選びな さい。 (1) How many members played sports outside the home? ウ Three. ア One. イ Two. エ Four. (2) Who did more activities at home than activities outside the home? ア Emi and Shiho did. イ Kota and Taku did. ウ Shiho and Miho did. alasiol Uw エ Taku and Miho did. banusl 次のようにたずねられたとき,あなたはどのように答えますか,主語と動詞を含む英文 1文で書きなさい。 問 ngiste Tana (allavoda Which activity in the table do you want to do this weekend? |o ○oo

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