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专题八生命活动的调节1.(2015年全国新课标卷Ⅰ,2)下列关于植物生长素的叙述,错误的是()A.植物幼嫩叶片中的色氨酸可转变为生长素B.成熟茎韧皮部中的生长素可以进行非极性运输C.幼嫩细胞和成熟细胞对生长素的敏感程度相同D.豌豆幼苗切段中乙烯的合成受生长素浓度的影响【解题思路】生长素可以由色氨酸在酶催化作用下生成,A项正确;在成熟组织中,生长素通过韧皮部进行非极性运输,B项正确;幼嫩细胞比成熟细胞对生长素更为敏感,C项错误;生
Topic Eight life activities of the regulation 1. (2015 New Curriculum Volume I, 2) The following statement on the auxin, the error is () A. Trichoderma in young leaves of plants can be converted to auxin B . Auxin in the mature stem phloem can be non-polar transport C. tender cells and mature cells to the same sensitivity to auxin D. pea seedling section ethylene synthesis by the concentration of auxin [ideas] Auxin can be produced by tryptophan under the action of enzyme catalysis, and item A is correct. In mature tissues, auxin is transported by phloem for non-polar transport, and item B is correct; young and tender cells are more sensitive to auxin than mature cells, C error; students