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27. Which of the following is a correct statement about nitrogen fixation in root nodules?
(A) The plant contributes the nitrogenase enzyme.
(B) The process is relatively inexpensive in terms of ATP costs.
(C) Leghemoglobin helps maintain a low O2 concentration within the nodule.
(D) The bacteria of the nodule are autotrophic.


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mi su 大二上 (2020/10/23)
豆科血紅素可以與氧氣結合,使氧濃度降低固...


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刷刷刷 大四上 (2024/03/29)
根瘤中的豆科血紅素(Leghemoglobin ),其血基質和氧氣的高親和力,攜帶大量氧氣供細胞行呼吸作用,製造大量ATP,使固氮作用順利進行。同時血基質和氧氣結合,也可以降低根瘤內的游離氧氣濃度,以避免固氮酵素受氧氣的抑制。因此在豆科植物根瘤中,豆科血紅素負起了輸送和調節氧氣濃度的雙重功能。
(A) The plant bacteria contributes the nitrogenase enzyme.
(B) The process is relatively inexpensive in terms of ATP costs.固氮作用需要消耗能量(ATP)
(C) Leghemoglobin helps maintain a low O2 concentration within the nodule.
(D) The bacteria of the nodule are autotrophic(自營的).

27. Which of the following is a correct ..-阿摩線上測驗