2020届高考生物真题优选卷全国卷第五卷
※题型：单选题※知识点：单选题※试题难度：中等<br>若利用根瘤农杆菌转基因技术将抗虫基因和抗除草剂基因转入大豆,获得若干转基因植物(T<substyle="POSITION:relative;LINE-HEIGHT:0;WIDOWS:2;TEXT-TRANSFORM:none;BACKGROUND-COLOR:rgb(255,255,255);FONT-STYLE:normal;TEXT-INDENT:0px;BOTTOM:-0.25em;FONT-FAMILY:zuoyeFont_mathFont;WHITE-SPACE:normal;ORPHANS:2;LETTER-SPACING:normal;COLOR:rgb(102,102,102);FONT-SIZE:12px;VERTICAL-ALIGN:baseline;FONT-WEIGHT:normal;WORD-SPACING:0px;font-variant-ligatures:normal;font-variant-caps:normal;-webkit-text-stroke-width:0px">0</sub>代),从中选择抗虫抗除草剂的单株S<substyle="POSITION:relative;LINE-HEIGHT:0;WIDOWS:2;TEXT-TRANSFORM:none;BACKGROUND-COLOR:rgb(255,255,255);FONT-STYLE:normal;TEXT-INDENT:0px;BOTTOM:-0.25em;FONT-FAMILY:zuoyeFont_mathFont;WHITE-SPACE:normal;ORPHANS:2;LETTER-SPACING:normal;COLOR:rgb(102,102,102);FONT-SIZE:12px;VERTICAL-ALIGN:baseline;FONT-WEIGHT:normal;WORD-SPACING:0px;font-variant-ligatures:normal;font-variant-caps:normal;-webkit-text-stroke-width:0px">1</sub>、S<substyle="POSITION:relative;LINE-HEIGHT:0;WIDOWS:2;TEXT-TRANSFORM:none;BACKGROUND-COLOR:rgb(255,255,255);FONT-STYLE:normal;TEXT-INDENT:0px;BOTTOM:-0.25em;FONT-FAMILY:zuoyeFont_mathFont;WHITE-SPACE:normal;ORPHANS:2;LETTER-SPACING:normal;COLOR:rgb(102,102,102);FONT-SIZE:12px;VERTICAL-ALIGN:baseline;FONT-WEIGHT:normal;WORD-SPACING:0px;font-variant-ligatures:normal;font-variant-caps:normal;-webkit-text-stroke-width:0px">2</sub>和S<substyle="POSITION:relative;LINE-HEIGHT:0;WIDOWS:2;TEXT-TRANSFORM:none;BACKGROUND-COLOR:rgb(255,255,255);FONT-STYLE:normal;TEXT-INDENT:0px;BOTTOM:-0.25em;FONT-FAMILY:zuoyeFont_mathFont;WHITE-SPACE:normal;ORPHANS:2;LETTER-SPACING:normal;COLOR:rgb(102,102,102);FONT-SIZE:12px;VERTICAL-ALIGN:baseline;FONT-WEIGHT:normal;WORD-SPACING:0px;font-variant-ligatures:normal;font-variant-caps:normal;-webkit-text-stroke-width:0px">3</sub>分别进行自交获得T<substyle="POSITION:relative;LINE-HEIGHT:0;WIDOWS:2;TEXT-TRANSFORM:none;BACKGROUND-COLOR:rgb(255,255,255);FONT-STYLE:normal;TEXT-INDENT:0px;BOTTOM:-0.25em;FONT-FAMILY:zuoyeFont_mathFont;WHITE-SPACE:normal;ORPHANS:2;LETTER-SPACING:normal;COLOR:rgb(102,102,102);FONT-SIZE:12px;VERTICAL-ALIGN:baseline;FONT-WEIGHT:normal;WORD-SPACING:0px;font-variant-ligatures:normal;font-variant-caps:normal;-webkit-text-stroke-width:0px">1</sub>代,T<substyle="POSITION:relative;LINE-HEIGHT:0;WIDOWS:2;TEXT-TRANSFORM:none;BACKGROUND-COLOR:rgb(255,255,255);FONT-STYLE:normal;TEXT-INDENT:0px;BOTTOM:-0.25em;FONT-FAMILY:zuoyeFont_mathFont;WHITE-SPACE:normal;ORPHANS:2;LETTER-SPACING:normal;COLOR:rgb(102,102,102);FONT-SIZE:12px;VERTICAL-ALIGN:baseline;FONT-WEIGHT:normal;WORD-SPACING:0px;font-variant-ligatures:normal;font-variant-caps:normal;-webkit-text-stroke-width:0px">1 </sub>代性状表现如图所示.已知目的基因能1次或多次插入并整合到受体细胞染色体上.下列叙述正确的是( )<img src="https://picture2.zhihuicn.com/testImage/1/2017/6/7/AFE9FB2AE837994BB085F6DFB56B94AE.png"><br>style="VERTICAL-ALIGN:middle">A.抗虫对不抗虫表现为完全显性,抗除草剂对不抗除草剂表现为不完全显性<br>B.根瘤农杆菌Ti质粒携带的抗虫和抗除草剂基因分别插入到了S<sub>2</sub>的2条非同源染色体上,并正常表达<br>C.若给S<sub>1</sub>后代T<sub>1</sub>植株喷施适量的除草剂,让存活植株自交,得到的自交一代群体中不抗虫抗除草剂的基因型频率为1/2<br>D.若取S<sub>3</sub>后代T<sub>1</sub>纯合抗虫不抗除草剂与纯合不抗虫抗除草剂单株杂交,得到的子二代中抗虫抗除草剂的纯合子占1/9<br>答案<br><img src="https://picture2.zhihuicn.com/answer/1/9/2017/8b5bb793a63e4d8e9d760ff174b1ddff/D7C9A679F3C72D4F1064B7D0A0FD4AD8.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/1/9/2017/06e540016bfc4b18bd92d2659777e91d/269AB35362511EAF0BE1828B3A2F8CA9.png"><br><br>※题型：填空题※知识点：填空题※试题难度：中等<br>光合作用是整个生物圈的物质基础和能量基础:回答下列问题:1.为研究光合作用中碳的同化与去向,用__________的CO<sub>2</sub>供给小球藻,毎隔一定时间取样,并将样品立即加入到煮沸的甲醇中.甲醇用以杀死小球藻并__________标记化合物.浓缩后再点样进行双向纸层析,使标记化合物__________.根据标记化合物出现的时间,最先检测到的是三碳化合物.测此三碳化合物是CO<sub>2</sub>与某一个二碳分子结合生成的,但当__________后,发现RuBP的含量快速升荀.由此推知固定CO<sub>2</sub>的物质不是二碳分子.<br>2.在“探究环境因素对光合作用的影响”的活动中,选用某植物幼苗,用含有100mmol/LNaCl的完全营养液迸行培养,测定其光合作用速率和气孔导度,结果如图所示.本实验可推出的实验结论是__________________.实验中设置了前后自身对照,还可设置__________________作为空白对照.测量光合作用速率的指标除本实验采用的之外,还可采用可__________________.(答出两点即可)<img src="https://picture2.zhihuicn.com/testImage/1/2018/11/27/70CE574F3FB4E68DC8D956EC92D9A43B.png"><br>style="VERTICAL-ALIGN:middle"><br>答案<br><img src="https://picture2.zhihuicn.com/answer/1/9/2018/5e3ec44ac42e4f20832e8048c07ad9da/076C272329F5BD43211AAE7EE073C8E7.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/1/9/2018/36b4b47309ab4ad2bd9163829fe9e336/725DE998756FAF7D81F094EDCA014C2A.png"><br><br>
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